JAVA筆記140-使用this語句解決構造器重載相互調用問題
阿新 • • 發佈:2017-05-10
circle dem private ring [] () cnblogs his 解決
int xxyy = p.getX() * p.getX() + p.getY() * p.getY();
int rr = this.r * this.r;
if(xxyy > rr){
return 1;
}else if(xxyy < rr){
return 0;
}else{
return -1;
}
}
} Point p = new Point(3,4);//點的位置
Circle c = new Circle(5);//創建圓
int ret = c.judge(p);
System.out.println(ret);
}
}
//創建點對象
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 int getY(){
return y;
}
}
//創建圓對象
class Circle{
private int r;//圓的半徑
Circle(int r){
this.r = r;
}
int judge(Point p){
int rr = this.r * this.r;
if(xxyy > rr){
return 1;
}else if(xxyy < rr){
return 0;
}else{
return -1;
}
}
}
//測試:判斷點與圓之間的關系
public class thisDemo{
public static void main(String[] args){
Circle c = new Circle(5);//創建圓
int ret = c.judge(p);
System.out.println(ret);
}
}
JAVA筆記140-使用this語句解決構造器重載相互調用問題