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Java Source | 1996-05-03 | 3.5 KB | 107 lines |
- /*
- * @(#)Class.java 1.26 95/12/21
- *
- * Copyright (c) 1994 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Permission to use, copy, modify, and distribute this software
- * and its documentation for NON-COMMERCIAL purposes and without
- * fee is hereby granted provided that this copyright notice
- * appears in all copies. Please refer to the file "copyright.html"
- * for further important copyright and licensing information.
- *
- * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
- * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
- * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
- */
-
- package java.lang;
-
- /**
- * Class objects contain runtime representations of classes. Every
- * object in the system is an instance of some Class, and for each Class
- * there is one of these descriptor objects. A Class descriptor is not
- * modifiable at runtime.<p>
- * The following example uses a Class object to print the Class name
- * of an object:
- * <pre>
- * void printClassName(Object obj) {
- * System.out.println("The class of " + obj +
- * " is " + obj.getClass().getName());
- * }
- * </pre>
- * @version 1.26, 21 Dec 1995
- */
- public final
- class Class {
- /**
- * Make sure nobody instantiates this class
- */
- private Class() {}
-
- /**
- * Returns the runtime Class descriptor for the specified Class.
- * For example, the following code fragment returns the runtime
- * Class descriptor for the Class named java.lang.Thread:
- * <pre>
- * Class t = Class.forName("java.lang.Thread")
- * </pre>
- * @param className the fully qualified name of the desired Class
- * @exception ClassNotFoundException If the Class could not be found.
- */
- public static native Class forName(String className) throws ClassNotFoundException;
-
- /**
- * Creates a new instance of this Class.
- * @return the new instance of this Class.
- * @exception InstantiationException If you try to instantiate
- * an abstract class or an interface, or if
- * the instantiation fails for some other reason.
- * @exception IllegalAccessException If the class or initializer
- * is not accessible.
- */
- public native Object newInstance()
- throws InstantiationException, IllegalAccessException;
-
- /**
- * Returns the name of this Class.
- */
- public native String getName();
-
- /**
- * Returns the superclass of this Class.
- */
- public native Class getSuperclass();
-
- /**
- * Returns the interfaces of this Class. An array
- * of length 0 is returned if this Class implements no interfaces.
- */
- public native Class getInterfaces()[];
-
- /**
- * Returns the Class loader of this Class. Returns null
- * if this Class does not have a Class loader.
- * @see ClassLoader
- */
- public native ClassLoader getClassLoader();
-
- /**
- * Returns a boolean indicating whether or not this Class is an
- * interface.
- */
- public native boolean isInterface();
-
- /**
- * Returns the name of this class or interface. The word
- * "class" is prepended if it is a Class; the word "interface"
- * is prepended if it is an interface.
- */
- public String toString() {
- return (isInterface() ? "interface " : "class ") + getName();
- }
- }
-
-