匿名内部类

// package com.egov.builder.nbn;public interface A {  public void doSomething();}package com.egov.builder.nbn;public class B {    public void fun(A a){    System.out.println("fun");    a.doSomething();  }}package com.egov.builder.nbn;public class T {  /**   * @Methodname: main   * @Discription: TODO   * @param args   * @Return: void   * @Throws   *   */  public static void main(String[] args) {    // TODO Auto-generated method stub    B b = new B();    b.fun(new A(){      public void doSomething() {        System.out.println("匿名内部类");      }          });  }}