Question

如何在java中创建一个“自定义异常类”？

在一个方法中抛出自定义异常，如何在该方法的catch处理程序中捕获并重新抛出

Answer 1

public class sssss {

public static void main(String[] args) {

System.out.print("Please input an Integer: ");

int value = new Scanner(System.in).nextInt();

try{
if(value < 0){
throw new MyException("My Exception comes!");
}
}catch (MyException myExp){
System.out.println("MyExcepton caugth!");
}

}
}

class MyException extends Exception{

public MyException(String s){
System.out.println("MyException occurs. The value must be greater than ZERO!");
}
}
-----------------------
Please input an Integer: -5
MyException occurs. The value must be greater than ZERO!
MyExcepton caugth!