Java设计模式七大原则之合成复用原则详解

/**
 * 类A
 * @author:liyajie
 * @createTime:2022/2/9 9:50
 * @version:1.0
 */
public class A {
    public void method1(){
        System.out.println("你调用了方法一");
    }

    public void method2(){
        System.out.println("你调用了方法二");
    }
}

/**
 * 类B
 * @author:liyajie
 * @createTime:2022/2/9 9:51
 * @version:1.0
 */
public class B extends A{
}

/**
 * 测试类
 * @author:liyajie
 * @createTime:2022/2/9 9:52
 * @version:1.0
 */
public class Test {
    public static void main(String[] args) {
        new B().method1();
        new B().method2();
    }
}

/**
 * 类B2
 * @author:liyajie
 * @createTime:2022/2/9 9:51
 * @version:1.0
 */
public class B2{

    A a = new A();

    public void method1(){
        a.method1();
    }

    public void method2(){
        a.method2();
    }
}

/**
 * 测试类
 * @author:liyajie
 * @createTime:2022/2/9 9:52
 * @version:1.0
 */
public class Test2 {
    public static void main(String[] args) {
        new B().method1();
        new B().method2();
    }
}

/**
 * 类B3
 * @author:liyajie
 * @createTime:2022/2/9 9:51
 * @version:1.0
 */
public class B3 {

    public void method1(A a){
        a.method1();
    }

    public void method2(A a){
        a.method2();
    }
}