Java面向对象之继承的概念详解

public class Fu {
    public void show() {
        System.out.println("show方法被调用");
    }
}
public class Zi extends Fu {
    public void method() {
        System.out.println("method方法被调用");
    }
}
public class Demo {
    public static void main(String[] args) {
        //创建对象，调用方法
        Fu f = new Fu();
        f.show();

        Zi z = new Zi();
        z.method();
        z.show();
    }
}

public class Granddad {

    public void drink() {
        System.out.println("爷爷爱喝酒");
    }

}

public class Father extends Granddad {

    public void smoke() {
        System.out.println("爸爸爱抽烟");
    }

}

public class Mother {

    public void dance() {
        System.out.println("妈妈爱跳舞");
    }

}
public class Son extends Father {
	// 此时，Son类中就同时拥有drink方法以及smoke方法
}

class Fu {
    int num = 10;
}
class Zi {
    int num = 20;
    public void show(){
        int num = 30;
        System.out.println(num);
    }
}
public class Demo1 {
    public static void main(String[] args) {
        Zi z = new Zi();
        z.show();	// 输出show方法中的局部变量30
    }
}

public class Fu {
    private void show() {
        System.out.println("Fu中show()方法被调用");
    }

    void method() {
        System.out.println("Fu中method()方法被调用");
    }
}

public class Zi extends Fu {

    
    @Override
    private void show() {
        System.out.println("Zi中show()方法被调用");
    }
   
    
    @Override
    private void method() {
        System.out.println("Zi中method()方法被调用");
    }

    
    @Override
    public void method() {
        System.out.println("Zi中method()方法被调用");
    }
}