The Java Developers Almanac 1.4

e62. Getting the Superclass of an Object

    Object o = new String();
    Class sup = o.getClass().getSuperclass();  // java.lang.Object
    
    // Superclass of Object is null
    o = new Object();
    sup = o.getClass().getSuperclass();        // null
    
    // Although the type of o2 is an interface, getSuperclass() returns the object's superclass
    Runnable o2 = new Runnable() {
        public void run() {
        }
    };
    sup = o2.getClass().getSuperclass();       // java.lang.Object

Related Examples

e59. Getting a Class Object
e60. Getting the Name of a Class Object
e61. Determining If a Class Object Represents a Class or Interface
e63. Getting the Superclass of a Class Object
e64. Listing the Interfaces That a Class Implements
e65. Listing the Interfaces That an Interface Extends
e66. Getting the Package of a Class
e67. Determining from Where a Class Was Loaded
e68. Loading a Class That Is Not on the Classpath
e69. Dynamically Reloading a Modified Class

See also: Arrays    Assertions    Commands    Numbers    Objects    Strings    System Properties    Threads

© 2002 Addison-Wesley.