Question

java练习题，判断第二个矩形是否完全在第一个矩形以内，还是两者部分相交、还是相离？

请问这段代码的思维方式
Scanner input = new Scanner(System.in);

System.out.print("Enter circle1's center x-, y-coordinates, and radius:");
double x1 = input.nextDouble();
double y1 = input.nextDouble();
double r1 = input.nextDouble();

System.out.print("Enter circle2's center x-, y-coordinates, and radius:");
double x2 = input.nextDouble();
double y2 = input.nextDouble();
double r2 = input.nextDouble();

double temp = Math.pow((x1 - x2), 2) + Math.pow((y2 - y1), 2);
double distance = Math.pow(temp, 0.5);

if (distance <= Math.abs(r1 - r2))
System.out.println("circle2 is inside circle1");
else if (distance <= (r1 + r2))
System.out.println("circle2 overlaps circle1");
else
System.out.println("circle2 does not overlap circle1");

Answer 1

这种题只对数学有用，对于学习Java一点用也没有。练习不到算法和语法。
Java2D有类和方法解决这类问题。否则，绘图时碰撞都由程序员自己写累死了。