创建一个Point类，有成员变量x，y，方法getX(),setX()，还有一个构造方 法初始化x和y。创建类主类A来测试它。

package com.homework.zw;

public class Point {
    private int x;
    private int y;

    Point(int x, int y) {
        this.x = x;
        this.y = y;
    }

    public int getX() {
        return x;
    }

    public void setX(int x) {
        this.x = x;
    }

    public int getY() {
        return y;
    }

    public void setY(int y) {
        this.y = y;
    }

}

package com.homework.zw;

public class A {

	public static void main(String[] args) {
        Point po=new Point(25,30);
        System.out.println("x="+po.getX()+"  y="+po.getY());
        po.setX(200);
        po.setY(250);
        System.out.println("x="+po.getX()+"  y="+po.getY());
	}

}