//: initialzation/Flower.java

// Calling constructors with "this"

import java.util.*;

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/ String arg only, s = " + ss);

s = ss;

}

Flower(String s, int petals){

this(petals); // 必须将构造器调用置于最起始处

// this(s); // Can't call two this可以调用一个构造器，但却不能调用两个

this.s = s; //参数 s 的名称和数据成员s名字相同,用 this.s 代表数据成员

System.out.println("String & int args");

}

Flower(){

this("hi", 47);

System.out.println("default constructor (no args)");

}

void printPetalcount(){ // 除构造器外，编译器禁止在其他方法中调用构造器

// this(11); // Not inside non-constructor

System.out.println("petalCount = " + petalCount + " s = " + s);

}

public static void main(String[] args){

Flower x = new Flower();

x.printPetalcount();

}

}