JAVA接口继承、抽象类等

1、定义接口

package test.intefaces;

public interface TestIntefaceA {
    void testA();
    void testB();
    void testC();
}

2、定义抽象类实现接口:

package test.intefaces.impl;

import test.intefaces.TestIntefaceA;

public abstract  class TestAbstractImplA implements TestIntefaceA {

    @Override
    public void testA() {
        
    }
    public void testNewD()
    {
        System.out.println("新追加的方法!");
    }
}

2-1:定义类继承抽象类:

package test.intefaces.impl;

import test.intefaces.TestIntefaceA;

public class TestImplA1 extends TestAbstractImplA {
    @Override
    public void testA(){
        // 父类抽(抽象类已经实现了该方法,可以重写,也可以不重写,不会出错)
    }
    
  // 必须要有 @Override
public void testB() { // TODO Auto-generated method stub }
@Override
public void testC() {  // 必须要有 // TODO Auto-generated method stub } }

2-2:普通类继承父类,实现接口

package test.intefaces.impl;

public class TestImplA2 extends TestAbstractImplA {

    @Override
    public void testB() {
        // TODO Auto-generated method stub
    }

    @Override
    public void testC() {
        // TODO Auto-generated method stub
    }
}

 

以上,好好学习一下!

posted @ 2015-09-27 14:36  园芳宝贝  阅读(222)  评论(0编辑  收藏  举报