This关键字，打印花瓣的数量

/**
 * 测试构造器类
 * 打印花瓣数量
 * <p>
 * 很喜欢《Thing in java》5.4章中关于this关键字的这个小例子
 * 写下来仅表纪念和喜欢
 * </P>
 * @author zhangss 2017-3-27 17:12:10
 * @version 1.0
 * */
public class Flower {
    int petalCount = 0;
    String s = "initial value";
    
    Flower(int petals){
        petalCount = petals;
        System.out.println("Constructor w/ int arg only, petalCount = "  + petalCount);
    }
    
    Flower(String ss){
        System.out.println("Constructor w/ int arg only, s = "  + ss);
    }
    
    Flower(String s, int petals){
        this(petals);
//        this(petals);// can't call two!
        this.s = s;
        System.out.println("String & int args");
    }
    
    Flower(){
        this("hi", 47);
        System.out.println("default constructor (no args)");
    }
    void printPetalCount(){
//        this(11); // not inside non-constructor
        System.out.println("petalCount = " + petalCount + " s " + s);
    }
    public static void main(String[] args){
        Flower f = new Flower();
        f.printPetalCount();
    }
}