复习java关键字---this&&super

1.this关键字

package cn.tedu;

public class ReviewThis {
    public static void main(String[] args) {
        
        cat c = new cat();
        c.test();
    }
}
class cat{
    public cat(){
        this(8);
        System.out.println("无参构造");
    }
    public cat(int num) {
        this.num = num;
        System.out.println("含参构造");
    }

    int num ;
    public void test(){
        int num = 10;
        System.out.println(num);
        System.out.println(this.num);
    }
}

2.super关键字

package cn.tedu;

public class ReviewSuper {
    public static void main(String[] args) {
        
        father father = new father("r");
        father.test01();
        son son = new son();
        son.test02();
    }
}
class father{
    String s = "父类的成员变量s";
    public father() {
        System.out.println("父类的无参构造");
    }
    public father(String s) {
        this.s = s;
        System.out.println("父类的含参构造");
    }
    public void test01(){
        String s = "父类的局部变量s";
        System.out.println(s);
        System.out.println(this.s);
    }
}
class son extends father{
    String s = "子类的成员变量s";
    public son() {
        super("t");
        System.out.println("子类的无参构造");
    }
    public void test02(){
        String s = "子类的局部变量s";
        System.out.println(s);
        System.out.println(this.s);
        System.out.println(super.s);
    }
}