testvariable.java

用java编写的一些初级代码

class Variable{
    int x=0,y=0,z=0;
    void init (int x,int y){
	this.x=x;
	this.y=y;
	int z=5;
	System.out.println("**init**\n"+"x="+x+" y="+y+" z="+z);
    }
    void init (int x){
	//重载
	this.x=x;
	System.out.println("**init2**\n"+"x="+x);
    }
    Variable (int x){
	//构造函数
	init(x);
    }
    Variable (){
	//构造函数
    }
}
public class TestVariable{
    public static void main(String args[]){
	Variable v=new Variable();
	System.out.println("**before init**\n"+"x="+v.x+" y="+v.y+" z="+v.z);
	v.init(20,30);
	System.out.println("** after init**\n"+"x="+v.x+" y="+v.y+" z="+v.z);
	v.init(20);
	v=new Variable(30);
	System.out.println("**  init**\n"+"x="+v.x+" y="+v.y+" z="+v.z);
    }
}