constructdemo.java

软通公司培训的课件和习题里面有答案。。。

package com.iss.five;

public class ConstructDemo {

	private int a,b;
	
	public ConstructDemo(int a){
		this.a = a ;
	}
	
	public ConstructDemo(int a,int b){
		// StructDemo(a);   // 错误
		this(a);            // 在构造函数中调用另外一个构造函数用this
		this.a = a ;
		this.b = b ;
	}
	
	
	public static void main(String[] args) {
		// StructDemo s1 = new StructDemo();   // 错误
		ConstructDemo s2 = new ConstructDemo(1);
		ConstructDemo s3 = new ConstructDemo(1,2) ;

	}

}