public?abstract?class?Shape{}
public?class?Point?extends?Shape{
????public?Point(double?x,double?y){
????????this.x=x;
????????this.y=y
????}
}現在是這樣：Shape?s?=?new?Point(10,10);如何理解這個實例？
添加回答
舉報
0/150
提交
取消