chap4-5.txt

JAVA 学习资源

// 程序4-5
class point {
    int x, y;

    point(int a, int b){  	// 带参数的构造函数
        x=a;    y=b;
    }

    point( ){  			// 不带参数的构造函数
        x=-1;    y=-1;
    }
}

public class testPoint {
    public static void main(String args[ ]){
        point p1= new point(10,20);
        point p2= new point( );

        System.out.println(" x= "+p1.x +"   y= "+p1.y);
        System.out.println(" x= "+p2.x +"   y= "+p2.y);
    }
}