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java.lang.Object | +--java.lang.Class
Instances of the class Class represent classes and interfaces
in a running Java application. Every array also belongs to a class that is
reflected as a Class object that is shared by all arrays with
the same element type and number of dimensions. The primitive Java types
(boolean, byte, char,
short, int, long,
float, and double), and the keyword
void are also represented as Class objects.
Class has no public constructor. Instead Class
objects are constructed automatically by the Java Virtual Machine as classes
are loaded and by calls to the defineClass method in the class
loader.
The following example uses a Class object to print the
class name of an object:
void printClassName(Object obj) {
System.out.println("The class of " + obj +
" is " + obj.getClass().getName());
}
ClassLoader.defineClass(byte[], int, int), Serialized Form| Field Summary | |
private static java.security.ProtectionDomain |
allPermDomain
protection domain returned when the internal domain is null |
private static RuntimePermission |
getPDperm
permission required to get a protection domain |
private static ObjectStreamField[] |
serialPersistentFields
Class Class is special cased within the Serialization Stream Protocol. |
private static long |
serialVersionUID
use serialVersionUID from JDK 1.1 for interoperability |
| Constructor Summary | |
private |
Class()
|
| Method Summary | |
(package private) static void |
|
private void |
checkMemberAccess(int which,
ClassLoader ccl)
|
static Class |
forName(String className)
Returns the Class object associated with the class or
interface with the given string name. |
static Class |
forName(String name,
boolean initialize,
ClassLoader loader)
Returns the Class object associated with the class or
interface with the given string name, using the given class loader. |
private static Class |
forName0(String name,
boolean initialize,
ClassLoader loader)
Called after security checks have been made. |
Class[] |
getClasses()
Returns an array containing Class objects representing all
the public classes and interfaces that are members of the class
represented by this Class object. |
ClassLoader |
getClassLoader()
Returns the class loader for the class. |
private ClassLoader |
getClassLoader0()
|
Class |
getComponentType()
Returns the Class representing the component type of an
array. |
java.lang.reflect.Constructor |
getConstructor(Class[] parameterTypes)
Returns a Constructor object that reflects the specified
public constructor of the class represented by this Class
object. |
private java.lang.reflect.Constructor |
getConstructor0(Class[] parameterTypes,
int which)
|
java.lang.reflect.Constructor[] |
getConstructors()
Returns an array containing Constructor objects reflecting
all the public constructors of the class represented by this
Class object. |
private java.lang.reflect.Constructor[] |
getConstructors0(int which)
|
Class[] |
getDeclaredClasses()
Returns an array of Class objects reflecting all the
classes and interfaces declared as members of the class represented by
this Class object. |
private Class[] |
getDeclaredClasses0()
|
java.lang.reflect.Constructor |
getDeclaredConstructor(Class[] parameterTypes)
Returns a Constructor object that reflects the specified
constructor of the class or interface represented by this
Class object. |
java.lang.reflect.Constructor[] |
getDeclaredConstructors()
Returns an array of Constructor objects reflecting all the
constructors declared by the class represented by this
Class object. |
java.lang.reflect.Field |
getDeclaredField(String name)
Returns a Field object that reflects the specified declared
field of the class or interface represented by this Class
object. |
java.lang.reflect.Field[] |
getDeclaredFields()
Returns an array of Field objects reflecting all the fields
declared by the class or interface represented by this
Class object. |
java.lang.reflect.Method |
getDeclaredMethod(String name,
Class[] parameterTypes)
Returns a Method object that reflects the specified
declared method of the class or interface represented by this
Class object. |
java.lang.reflect.Method[] |
getDeclaredMethods()
Returns an array of Method objects reflecting all the
methods declared by the class or interface represented by this
Class object. |
Class |
getDeclaringClass()
If the class or interface represented by this Class object
is a member of another class, returns the Class object
representing the class in which it was declared. |
java.lang.reflect.Field |
getField(String name)
Returns a Field object that reflects the specified public
member field of the class or interface represented by this
Class object. |
private java.lang.reflect.Field |
getField0(String name,
int which)
|
java.lang.reflect.Field[] |
getFields()
Returns an array containing Field objects reflecting all
the accessible public fields of the class or interface represented by
this Class object. |
private java.lang.reflect.Field[] |
getFields0(int which)
|
Class[] |
getInterfaces()
Determines the interfaces implemented by the class or interface represented by this object. |
java.lang.reflect.Method |
getMethod(String name,
Class[] parameterTypes)
Returns a Method object that reflects the specified public
member method of the class or interface represented by this
Class object. |
private java.lang.reflect.Method |
getMethod0(String name,
Class[] parameterTypes,
int which)
|
java.lang.reflect.Method[] |
getMethods()
Returns an array containing Method objects reflecting all
the public member methods of the class or interface represented
by this Class object, including those declared by the class
or interface and and those inherited from superclasses and
superinterfaces. |
private java.lang.reflect.Method[] |
getMethods0(int which)
|
int |
getModifiers()
Returns the Java language modifiers for this class or interface, encoded in an integer. |
String |
getName()
Returns the fully-qualified name of the entity (class, interface, array class, primitive type, or void) represented by this Class
object, as a String. |
Package |
getPackage()
Gets the package for this class. |
(package private) static Class |
getPrimitiveClass(String name)
|
java.security.ProtectionDomain |
getProtectionDomain()
Returns the ProtectionDomain of this class. |
private java.security.ProtectionDomain |
getProtectionDomain0()
Returns the ProtectionDomain of this class. |
java.net.URL |
getResource(String name)
Finds a resource with a given name. |
InputStream |
getResourceAsStream(String name)
Finds a resource with a given name. |
Object[] |
getSigners()
Gets the signers of this class. |
Class |
getSuperclass()
Returns the Class representing the superclass of the entity
(class, interface, primitive type or void) represented by this
Class. |
boolean |
isArray()
Determines if this Class object represents an array class. |
boolean |
isAssignableFrom(Class cls)
Determines if the class or interface represented by this Class object is either the same as, or is a superclass or
superinterface of, the class or interface represented by the specified
Class parameter. |
boolean |
isInstance(Object obj)
Determines if the specified Object is assignment-compatible
with the object represented by this Class. |
boolean |
isInterface()
Determines if the specified Class object represents an
interface type. |
boolean |
isPrimitive()
Determines if the specified Class object represents a
primitive type. |
Object |
newInstance()
Creates a new instance of the class represented by this Class object. |
private Object |
newInstance0()
|
private static void |
registerNatives()
|
private String |
resolveName(String name)
Add a package name prefix if the name is not absolute Remove leading "/" if name is absolute |
(package private) void |
setProtectionDomain0(java.security.ProtectionDomain pd)
Set the ProtectionDomain for this class. |
(package private) void |
setSigners(Object[] signers)
Set the signers of this class. |
String |
toString()
Converts the object to a string. |
| Methods inherited from class java.lang.Object |
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
wait,
wait,
wait |
| Field Detail |
private static RuntimePermission getPDperm
private static java.security.ProtectionDomain allPermDomain
private static final long serialVersionUID
private static final ObjectStreamField[] serialPersistentFields
TC_CLASS ClassDescriptor
A ClassDescriptor is a special cased serialization of
a java.io.ObjectStreamClass instance.
A new handle is generated for the initial time the class descriptor
is written into the stream. Future references to the class descriptor
are written as references to the initial class descriptor instance.ObjectStreamClass| Constructor Detail |
private Class()
| Method Detail |
private static void registerNatives()
static void()
public String toString()
getName. If this Class object represents a
primitive type, this method returns the name of the primitive type. If
this Class object represents void this method returns
"void".
public static Class forName(String className)
throws ClassNotFoundException
Class object associated with the class or
interface with the given string name. Invoking this method is
equivalent to:
whereClass.forName(className, true, currentLoader)
currentLoader denotes the defining class loader of
the current class.
For example, the following code fragment returns the
runtime Class descriptor for the class named
java.lang.Thread:
Class t = Class.forName("java.lang.Thread")
A call to forName("X") causes the class named X to be initialized.
className - the fully qualified name of the desired class.Class object for the class with the
specified name.
public static Class forName(String name,
boolean initialize,
ClassLoader loader)
throws ClassNotFoundException
Class object associated with the class or
interface with the given string name, using the given class loader.
Given the fully qualified name for a class or interface (in the same
format returned by getName) this method attempts to
locate, load, and link the class or interface. The specified class
loader is used to load the class or interface. If the parameter
loader is null, the class is loaded through the bootstrap
class loader. The class is initialized only if the
initialize parameter is true and if it has
not been initialized earlier.
If name denotes a primitive type or void, an attempt
will be made to locate a user-defined class in the unnamed package whose
name is name. Therefore, this method cannot be used to
obtain any of the Class objects representing primitive
types or void.
If name denotes an array class, the component type of
the array class is loaded but not initialized.
For example, in an instance method the expression:
Class.forName("Foo")
Class.forName("Foo", true, this.getClass().getClassLoader())
If the loader is null, and a security
manager is present, and the caller's class loader is not null, then this
method calls the security manager's checkPermission method
with a RuntimePermission("getClassLoader") permission to
ensure it's ok to access the bootstrap class loader.
name - fully qualified name of the desired classinitialize - whether the class must be initializedloader - class loader from which the class must be loadedforName(String),
ClassLoader
private static Class forName0(String name,
boolean initialize,
ClassLoader loader)
throws ClassNotFoundException
public Object newInstance()
throws InstantiationException,
IllegalAccessException
new
expression with an empty argument list. The class is initialized if it
has not already been initialized.
If there is a security manager, this method first calls the security
manager's checkMemberAccess method with this
and Member.PUBLIC as its arguments. If the class is in a
package, then this method also calls the security manager's
checkPackageAccess method with the package name as its
argument. Either of these calls could result in a SecurityException.
Class represents an abstract class,
an interface, an array class,
a primitive type, or void;
or if the instantiation fails for some other reason.
private Object newInstance0()
throws InstantiationException,
IllegalAccessException
public boolean isInstance(Object obj)
Object is assignment-compatible
with the object represented by this Class. This method is
the dynamic equivalent of the Java language instanceof
operator. The method returns true if the specified
Object argument is non-null and can be cast to the
reference type represented by this Class object without
raising a ClassCastException. It returns false
otherwise.
Specifically, if this Class object represents a
declared class, this method returns true if the specified
Object argument is an instance of the represented class (or
of any of its subclasses); it returns false otherwise. If
this Class object represents an array class, this method
returns true if the specified Object argument
can be converted to an object of the array class by an identity
conversion or by a widening reference conversion; it returns
false otherwise. If this Class object
represents an interface, this method returns true if the
class or any superclass of the specified Object argument
implements this interface; it returns false otherwise. If
this Class object represents a primitive type, this method
returns false.
obj - the object to checkpublic boolean isAssignableFrom(Class cls)
Class object is either the same as, or is a superclass or
superinterface of, the class or interface represented by the specified
Class parameter. It returns true if so;
otherwise it returns false. If this Class
object represents a primitive type, this method returns
true if the specified Class parameter is
exactly this Class object; otherwise it returns
false.
Specifically, this method tests whether the type represented by the
specified Class parameter can be converted to the type
represented by this Class object via an identity conversion
or via a widening reference conversion. See The Java Language
Specification, sections 5.1.1 and 5.1.4 , for details.
public boolean isInterface()
Class object represents an
interface type.true if this object represents an interface;
false otherwise.public boolean isArray()
Class object represents an array class.true if this object represents an array class;
false otherwise.public boolean isPrimitive()
Class object represents a
primitive type.
There are nine predefined Class objects to represent
the eight primitive types and void. These are created by the Java
Virtual Machine, and have the same names as the primitive types that
they represent, namely boolean, byte,
char, short, int,
long, float, and double.
These objects may only be accessed via the following public static
final variables, and are the only Class objects for which
this method returns true.
Boolean.TYPE,
Character.TYPE,
Byte.TYPE,
Short.TYPE,
Integer.TYPE,
Long.TYPE,
Float.TYPE,
Double.TYPE,
Void.TYPEpublic String getName()
Class
object, as a String.
If this Class object represents a class of arrays, then
the internal form of the name consists of the name of the element type
in Java signature format, preceded by one or more "["
characters representing the depth of array nesting. Thus:
returns "(new Object[3]).getClass().getName()
[Ljava.lang.Object;" and:
returns "(new int[3][4][5][6][7][8][9]).getClass().getName()
[[[[[[[I". The encoding of element type names
is as follows:
The class or interface name classname is given in fully qualified form as shown in the example above.B byte C char D double F float I int J long Lclassname; class or interface S short Z boolean
public ClassLoader getClassLoader()
If a security manager is present, and the caller's class loader is
not null and the caller's class loader is not the same as or an ancestor of
the class loader for the class whose class loader is requested, then
this method calls the security manager's checkPermission
method with a RuntimePermission("getClassLoader")
permission to ensure it's ok to access the class loader for the class.
If this object represents a primitive type or void, null is returned.
checkPermission method denies
access to the class loader for the class.ClassLoader,
SecurityManager.checkPermission(java.security.Permission),
RuntimePermissionprivate ClassLoader getClassLoader0()
public Class getSuperclass()
Class representing the superclass of the entity
(class, interface, primitive type or void) represented by this
Class. If this Class represents either the
Object class, an interface, a primitive type, or void, then
null is returned. If this object represents an array class then the
Class object representing the Object class is
returned.public Package getPackage()
Packages have attributes for versions and specifications only if the information was defined in the manifests that accompany the classes, and if the class loader created the package instance with the attributes from the manifest.
public Class[] getInterfaces()
If this object represents a class, the return value is an array
containing objects representing all interfaces implemented by the
class. The order of the interface objects in the array corresponds to
the order of the interface names in the implements clause
of the declaration of the class represented by this object. For
example, given the declaration:
class Shimmer implements FloorWax, DessertTopping { ... }
s is an instance of
Shimmer; the value of the expression:
is thes.getClass().getInterfaces()[0]
Class object that represents interface
FloorWax; and the value of:
is thes.getClass().getInterfaces()[1]
Class object that represents interface
DessertTopping.
If this object represents an interface, the array contains objects
representing all interfaces extended by the interface. The order of the
interface objects in the array corresponds to the order of the interface
names in the extends clause of the declaration of the
interface represented by this object.
If this object represents a class or interface that implements no interfaces, the method returns an array of length 0.
If this object represents a primitive type or void, the method returns an array of length 0.
public Class getComponentType()
Class representing the component type of an
array. If this class does not represent an array class this method
returns null.Arraypublic int getModifiers()
public, protected,
private, final, static,
abstract and interface; they should be decoded
using the methods of class Modifier.
If the underlying class is an array class, then its
public, private and protected
modifiers are the same as those of its component type. If this
Class represents a primitive type or void, its
public modifier is always true, and its
protected and private modifers are always
false. If this object represents an array class, a
primitive type or void, then its final modifier is always
true and its interface modifer is always
false. The values of its other modifiers are not determined
by this specification.
The modifier encodings are defined in The Java Virtual Machine Specification, table 4.1.
Modifierpublic Object[] getSigners()
void setSigners(Object[] signers)
public Class getDeclaringClass()
Class object
is a member of another class, returns the Class object
representing the class in which it was declared. This method returns
null if this class or interface is not a member of any other class. If
this Class object represents an array class, a primitive
type, or void,then this method returns null.public Class[] getClasses()
Class objects representing all
the public classes and interfaces that are members of the class
represented by this Class object. This includes public
class and interface members inherited from superclasses and public class
and interface members declared by the class. This method returns an
array of length 0 if this Class object has no public member
classes or interfaces. This method also returns an array of length 0 if
this Class object represents a primitive type, an array
class, or void.
For this class and each of its superclasses, the following
security checks are performed:
If there is a security manager, the security manager's
checkMemberAccess method is called
with this and Member.DECLARED
as its arguments, where this is this class or the superclass
whose members are being determined. If the class is in a package, then
the security manager's checkPackageAccess
method is also called with the package name
as its argument. Either of these calls could result in a SecurityException.
SecurityManager.checkMemberAccess(Class, int),
SecurityManager.checkPackageAccess(String)
public java.lang.reflect.Field[] getFields()
throws SecurityException
Field objects reflecting all
the accessible public fields of the class or interface represented by
this Class object. The elements in the array returned are
not sorted and are not in any particular order. This method returns an
array of length 0 if the class or interface has no accessible public
fields, or if it represents an array class, a primitive type, or void.
Specifically, if this Class object represents a class,
this method returns the public fields of this class and of all its
superclasses. If this Class object represents an
interface, this method returns the fields of this interface and of all
its superinterfaces.
If there is a security manager, this method first
calls the security manager's checkMemberAccess method
with this and Member.PUBLIC
as its arguments. If the class is in a package, then this method
also calls the security manager's checkPackageAccess
method with the package name
as its argument. Either of these calls could result in a SecurityException.
The implicit length field for array classs is not reflected by this
method. User code should use the methods of class Array to
manipulate arrays.
See The Java Language Specification, sections 8.2 and 8.3.
Field,
SecurityManager.checkMemberAccess(Class, int),
SecurityManager.checkPackageAccess(String)
public java.lang.reflect.Method[] getMethods()
throws SecurityException
Method objects reflecting all
the public member methods of the class or interface represented
by this Class object, including those declared by the class
or interface and and those inherited from superclasses and
superinterfaces. The elements in the array returned are not sorted and
are not in any particular order. This method returns an array of length
0 if this Class object represents a class or interface that
has no public member methods, or if this Class object
represents an array class, primitive type, or void.
If there is a security manager, this method first
calls the security manager's checkMemberAccess method
with this and Member.PUBLIC
as its arguments. If the class is in a package, then this method
also calls the security manager's checkPackageAccess
method with the package name
as its argument. Either of these calls could result in a SecurityException.
The class initialization method <clinit> is not
included in the returned array. If the class declares multiple public
member methods with the same parameter types, they are all included in
the returned array.
See The Java Language Specification, sections 8.2 and 8.4.
Method,
SecurityManager.checkMemberAccess(Class, int),
SecurityManager.checkPackageAccess(String)
public java.lang.reflect.Constructor[] getConstructors()
throws SecurityException
Constructor objects reflecting
all the public constructors of the class represented by this
Class object. An array of length 0 is returned if the
class has no public constructors, or if the class is an array class, or
if the class reflects a primitive type or void.
If there is a security manager, this method first
calls the security manager's checkMemberAccess method
with this and Member.PUBLIC
as its arguments. If the class is in a package, then this method
also calls the security manager's checkPackageAccess
method with the package name
as its argument. Either of these calls could result in a SecurityException.
Constructor,
SecurityManager.checkMemberAccess(Class, int),
SecurityManager.checkPackageAccess(String)
public java.lang.reflect.Field getField(String name)
throws NoSuchFieldException,
SecurityException
Field object that reflects the specified public
member field of the class or interface represented by this
Class object. The name parameter is a
String specifying the simple name of the desired field.
If there is a security manager, this method first
calls the security manager's checkMemberAccess method
with this and Member.PUBLIC
as its arguments. If the class is in a package, then this method
also calls the security manager's checkPackageAccess
method with the package name
as its argument. Either of these calls could result in a SecurityException.
The field to be reflected is determined by the algorithm that follows. Let C be the class represented by this object:
NoSuchFieldException
is thrown.See The Java Language Specification, sections 8.2 and 8.3.
Field,
SecurityManager.checkMemberAccess(Class, int),
SecurityManager.checkPackageAccess(String)
public java.lang.reflect.Method getMethod(String name,
Class[] parameterTypes)
throws NoSuchMethodException,
SecurityException
Method object that reflects the specified public
member method of the class or interface represented by this
Class object. The name parameter is a
String specifying the simple name the desired method. The
parameterTypes parameter is an array of Class
objects that identify the method's formal parameter types, in declared
order. If parameterTypes is null, it is
treated as if it were an empty array.
If there is a security manager, this method first
calls the security manager's checkMemberAccess method
with this and Member.PUBLIC
as its arguments. If the class is in a package, then this method
also calls the security manager's checkPackageAccess
method with the package name
as its argument. Either of these calls could result in a SecurityException.
If the name is "<init>"or "<clinit>" a
NoSuchMethodException is raised. Otherwise, the method to
be reflected is determined by the algorithm that follows. Let C be the
class represented by this object:
See The Java Language Specification, sections 8.2 and 8.4.
Method,
SecurityManager.checkMemberAccess(Class, int),
SecurityManager.checkPackageAccess(String)
public java.lang.reflect.Constructor getConstructor(Class[] parameterTypes)
throws NoSuchMethodException,
SecurityException
Constructor object that reflects the specified
public constructor of the class represented by this Class
object. The parameterTypes parameter is an array of
Class objects that identify the constructor's formal
parameter types, in declared order.
The constructor to reflect is the public constructor of the class
represented by this Class object whose formal parameter
types match those specified by parameterTypes.
If there is a security manager, this method first
calls the security manager's checkMemberAccess method
with this and Member.PUBLIC
as its arguments. If the class is in a package, then this method
also calls the security manager's checkPackageAccess
method with the package name
as its argument. Either of these calls could result in a SecurityException.
Constructor,
SecurityManager.checkMemberAccess(Class, int),
SecurityManager.checkPackageAccess(String)
public Class[] getDeclaredClasses()
throws SecurityException
Class objects reflecting all the
classes and interfaces declared as members of the class represented by
this Class object. This includes public, protected, default
(package) access, and private classes and interfaces declared by the
class, but excludes inherited classes and interfaces. This method
returns an array of length 0 if the class declares no classes or
interfaces as members, or if this Class object represents a
primitive type, an array class, or void.
If there is a security manager, this method first
calls the security manager's checkMemberAccess method
with this and Member.DECLARED
as its arguments. If the class is in a package, then this method
also calls the security manager's checkPackageAccess
method with the package name
as its argument. Either of these calls could result in a SecurityException.
SecurityManager.checkMemberAccess(Class, int),
SecurityManager.checkPackageAccess(String)
public java.lang.reflect.Field[] getDeclaredFields()
throws SecurityException
Field objects reflecting all the fields
declared by the class or interface represented by this
Class object. This includes public, protected, default
(package) access, and private fields, but excludes inherited fields.
The elements in the array returned are not sorted and are not in any
particular order. This method returns an array of length 0 if the class
or interface declares no fields, or if this Class object
represents a primitive type, an array class, or void.
See The Java Language Specification, sections 8.2 and 8.3.
If there is a security manager, this method first
calls the security manager's checkMemberAccess method
with this and Member.DECLARED
as its arguments. If the class is in a package, then this method
also calls the security manager's checkPackageAccess
method with the package name
as its argument. Either of these calls could result in a SecurityException.
Field,
SecurityManager.checkMemberAccess(Class, int),
SecurityManager.checkPackageAccess(String)
public java.lang.reflect.Method[] getDeclaredMethods()
throws SecurityException
Method objects reflecting all the
methods declared by the class or interface represented by this
Class object. This includes public, protected, default
(package) access, and private methods, but excludes inherited methods.
The elements in the array returned are not sorted and are not in any
particular order. This method returns an array of length 0 if the class
or interface declares no methods, or if this Class object
represents a primitive type, an array class, or void. The class
initialization method <clinit> is not included in the
returned array. If the class declares multiple public member methods
with the same parameter types, they are all included in the returned
array.
See The Java Language Specification, section 8.2.
If there is a security manager, this method first
calls the security manager's checkMemberAccess method
with this and Member.DECLARED
as its arguments. If the class is in a package, then this method
also calls the security manager's checkPackageAccess
method with the package name
as its argument. Either of these calls could result in a SecurityException.
Method,
SecurityManager.checkMemberAccess(Class, int),
SecurityManager.checkPackageAccess(String)
public java.lang.reflect.Constructor[] getDeclaredConstructors()
throws SecurityException
Constructor objects reflecting all the
constructors declared by the class represented by this
Class object. These are public, protected, default
(package) access, and private constructors. The elements in the array
returned are not sorted and are not in any particular order. If the
class has a default constructor, it is included in the returned array.
This method returns an array of length 0 if this Class
object represents an interface, a primitive type, an array class, or
void.
See The Java Language Specification, section 8.2.
If there is a security manager, this method first
calls the security manager's checkMemberAccess method
with this and Member.DECLARED
as its arguments. If the class is in a package, then this method
also calls the security manager's checkPackageAccess
method with the package name
as its argument. Either of these calls could result in a SecurityException.
Constructor,
SecurityManager.checkMemberAccess(Class, int),
SecurityManager.checkPackageAccess(String)
public java.lang.reflect.Field getDeclaredField(String name)
throws NoSuchFieldException,
SecurityException
Field object that reflects the specified declared
field of the class or interface represented by this Class
object. The name parameter is a String that
specifies the simple name of the desired field. Note that this method
will not reflect the length field of an array class.
If there is a security manager, this method first
calls the security manager's checkMemberAccess method
with this and Member.DECLARED
as its arguments. If the class is in a package, then this method
also calls the security manager's checkPackageAccess
method with the package name
as its argument. Either of these calls could result in a SecurityException.
Field,
SecurityManager.checkMemberAccess(Class, int),
SecurityManager.checkPackageAccess(String)
public java.lang.reflect.Method getDeclaredMethod(String name,
Class[] parameterTypes)
throws NoSuchMethodException,
SecurityException
Method object that reflects the specified
declared method of the class or interface represented by this
Class object. The name parameter is a
String that specifies the simple name of the desired
method, and the parameterTypes parameter is an array of
Class objects that identify the method's formal parameter
types, in declared order. If more than one method with the same
parameter types is declared in a class, and one of these methods has a
return type that is more specific than any of the others, that method is
returned; otherwise one of the methods is chosen arbitrarily. If the
name is "<init>"or "<clinit>" a NoSuchMethodException
is raised.
If there is a security manager, this method first
calls the security manager's checkMemberAccess method
with this and Member.DECLARED
as its arguments. If the class is in a package, then this method
also calls the security manager's checkPackageAccess
method with the package name
as its argument. Either of these calls could result in a SecurityException.
Method,
SecurityManager.checkMemberAccess(Class, int),
SecurityManager.checkPackageAccess(String)
public java.lang.reflect.Constructor getDeclaredConstructor(Class[] parameterTypes)
throws NoSuchMethodException,
SecurityException
Constructor object that reflects the specified
constructor of the class or interface represented by this
Class object. The parameterTypes parameter is
an array of Class objects that identify the constructor's
formal parameter types, in declared order.
If there is a security manager, this method first
calls the security manager's checkMemberAccess method
with this and Member.DECLARED
as its arguments. If the class is in a package, then this method
also calls the security manager's checkPackageAccess
method with the package name
as its argument. Either of these calls could result in a SecurityException.
Constructor,
SecurityManager.checkMemberAccess(Class, int),
SecurityManager.checkPackageAccess(String)public InputStream getResourceAsStream(String name)
This method delegates the call to its class loader, after making
these changes to the resource name: if the resource name starts with
"/", it is unchanged; otherwise, the package name is prepended to the
resource name after converting "." to "/". If this object was loaded by
the bootstrap loader, the call is delegated to
ClassLoader.getSystemResourceAsStream.
name - name of the desired resourcejava.io.InputStream object.ClassLoaderpublic java.net.URL getResource(String name)
This method delegates the call to its class loader, after making
these changes to the resource name: if the resource name starts with
"/", it is unchanged; otherwise, the package name is prepended to the
resource name after converting "." to "/". If this object was loaded by
the bootstrap loader, the call is delegated to
ClassLoader.getSystemResource.
name - name of the desired resourcejava.net.URL object.ClassLoaderpublic java.security.ProtectionDomain getProtectionDomain()
ProtectionDomain of this class. If there is a
security manager installed, this method first calls the security
manager's checkPermission method with a
RuntimePermission("getProtectionDomain") permission to
ensure it's ok to get the
ProtectionDomain.checkPermission method doesn't allow
geting the ProtectionDomain.ProtectionDomain,
SecurityManager.checkPermission(java.security.Permission),
RuntimePermissionprivate java.security.ProtectionDomain getProtectionDomain0()
void setProtectionDomain0(java.security.ProtectionDomain pd)
static Class getPrimitiveClass(String name)
private void checkMemberAccess(int which,
ClassLoader ccl)
private String resolveName(String name)
private java.lang.reflect.Field[] getFields0(int which)
private java.lang.reflect.Method[] getMethods0(int which)
private java.lang.reflect.Constructor[] getConstructors0(int which)
private java.lang.reflect.Field getField0(String name,
int which)
private java.lang.reflect.Method getMethod0(String name,
Class[] parameterTypes,
int which)
private java.lang.reflect.Constructor getConstructor0(Class[] parameterTypes,
int which)
private Class[] getDeclaredClasses0()
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