Java中super关键字详解

class A{
	public A(){
		System.out.println("父类构造方法执行！");
	}
}
public class superTest extends A{
	public superTest(){
		//这里会有一个默认的super(),会调用父类的无参构造。
		System.out.println("子类构造方法执行！");
	}
	public static void main(String[] args){
		superTest s = new superTest();
	}
}

class A{
	//无参构造
	public A(){
		System.out.println("父类无参构造方法执行！");
	}
	//有参构造
	public A(int a){
		System.out.println("父类有参构造方法执行！");
	}
}
public class superTest extends A{
	public superTest(){
		super(100);
		System.out.println("子类构造方法执行！");
	}
	public static void main(String[] args){
		superTest s = new superTest();
	}
}

class A{
	String name;
	public A(String name){
		this.name = name;
	}
}
public class superTest extends A{
	public superTest(String name){
		super(name);
	}
	public void shopping(){
		System.out.println(super.name + "正在购物！");
	}
	public static void main(String[] args){
		superTest s = new superTest("张三");
		s.shopping();
	}
}

class A{
	String name;
	public A(){
		name = "张三";
	}
}
public class superTest extends A{
	String name;
	public superTest(){
		name = "李四";
	}
	public void dosome(){
		System.out.println(this.name + "dosome !");
		//系统会自动将 name 看作 this.name
		System.out.println(name + "dosome !");
		System.out.println(super.name + "dosome !");
	}
	public static void main(String[] args){
		superTest s = new superTest();
		s.dosome();
	}
}