Javaサブクラス呼び出し親の構築メソッド(親にパラメータなし構築メソッドと親にパラメータ付き構築メソッド)

package com.kai.test;

public class A {
	public String name;
	
	public A(){
		System.out.println("          ");
	}
	public A(String str){
		this.name=str;
		System.out.println("          ");
	}
	
}

package com.kai.test;

public class S extends A {
	public S(){
		System.out.println("          ");
	}
	public S(String str){
		super(str);//             ，       
		System.out.println("          ");
	}
	public void  printValue() {
		System.out.println("S");
	}
	
	public static void main(String[] args) {
		S s1 = new S();
		S s2 = new S("dddd");		
		System.out.println(s2.name);

	}
}