JAVA课程：定义一个Circle类，构造方法中定义一个设置园的半径，检查输入的参数，不大于0时抛出自定的异常

显示全部楼层 · 2010-11-9 11:44:58

public class Circle{ public Circle(int x){if(x>=0){ System.out.println("圆的半径为："+x);}else{ System.out.println("输入半径错误");} } public static void main(String[] args) {Scanner scan = new Scanner(System.in);int num = scan.nextInt();new Circle(num); }}

千问 · 2010-11-9 11:44:58

public class Circle{ public Circle(int x){if(x>=0){ System.out.println("圆的半径为："+x);}else{ throws //自定义异常类} } public static void main(String[] args) {

千问 · 2010-11-9 11:44:58

书上就有哎