frankyara 2017-01-01 16:28 采纳率: 0%
浏览 958
已采纳

why only catch the first Exception of f(0)

// exceptions/Ex9.java
// TIJ4 Chapter Exceptions, Exercise 9, page 460
/* Create three new types of exceptions. Write a class with a method that

  • throws all three. In main(), call the method but only use a single catch
  • clause that will catch all three types of exceptions. / //import static net.mindview.util.Print.;

class ExceptionA extends Exception {
ExceptionA(String msg) { super(msg); }

}

class ExceptionB extends Exception {
ExceptionB(String msg) { super(msg); }

}

class ExceptionC extends Exception {
ExceptionC(String msg) { super(msg); }

}

public class Ex9 {
public static void f(int x) throws ExceptionA, ExceptionB, ExceptionC {
if(x < 0) throw new ExceptionA("x < 0");
if(x == 0) throw new ExceptionB("x == 0");
if(x > 0) throw new ExceptionC("x > 0");
}
public static void main(String[] args) {
try {
f(0);
f(1);
f(-1);
// will catch any Exception type:
} catch(Exception e) {
System.out.println("Caught Exception");
e.printStackTrace(System.out);
}
}

}

  • 写回答

1条回答

  • frankyara 2017-01-01 16:30
    关注

    i think of it.doing like this

    try {
            f(0);
        } catch (ExceptionA | ExceptionB | ExceptionC e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        try {
            f(1);
        } catch (ExceptionA | ExceptionB | ExceptionC e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        try {
            f(-1);
        } catch (ExceptionA | ExceptionB | ExceptionC e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

报告相同问题?

悬赏问题

  • ¥20 delta降尺度方法,未来数据怎么降尺度
  • ¥15 c# 使用NPOI快速将datatable数据导入excel中指定sheet,要求快速高效
  • ¥15 再不同版本的系统上,TCP传输速度不一致
  • ¥15 高德地图点聚合中Marker的位置无法实时更新
  • ¥15 DIFY API Endpoint 问题。
  • ¥20 sub地址DHCP问题
  • ¥15 delta降尺度计算的一些细节,有偿
  • ¥15 Arduino红外遥控代码有问题
  • ¥15 数值计算离散正交多项式
  • ¥30 数值计算均差系数编程