java考试题型及作业(10)

必考题。

p2=new Point(2,20);

p3=new Point(3,30);

System.out.println(p1.x+","+p1.y);

System.out.println(p2.x+","+p2.y);

System.out.println(p3.x+","+p3.y);

}

}

答：

3,10

3,20

3,30

4、阅读下列程序，分析输出结果。

public class MyDate {

private int day=12;

private int month=6;

private int year=1900;

public MyDate(int y,int m,int d) {

year=y;

month=m;

day=d;

}

void addYear()

{

year++;

}

public void display(){

System.out.println(year+"-"+month+"-"+day);

}

public static void main (String[] args) {

MyDate m,n;

m=new MyDate(2003,9,22);

n=m;

n.addYear();

m.display();

n.display();

}

}

答：

2004-9-22

2004-9-22