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Thread: try/catch

  1. #1
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    Default try/catch

    IF i am using try/catch block and an exception is caught, how can i go back to the initial try block to, 'try' again?

  2. #2
    mmm.. coffee JavaPF's Avatar
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    Default Re: try/catch

    Hello rsala004.

    Say you have a method called myMethod with a try/catch block in it. The exception is caught in the catch part so in catch you just need to call the method again.

    Example:

    public class rsala004 {
     
        /**
         * JavaProgrammingForums.com
         */    
        public void myMethod(){
     
            try{
            // whatever code here    
     
            }catch(Exception e){
            // When exception thrown, myMethod run again
                [B]myMethod();[/B]
            }
     
        }
     
        public static void main(String[] args) {
     
            rsala004 r = new rsala004();
            r.myMethod();
     
        }
    }
    Please use [highlight=Java] code [/highlight] tags when posting your code.
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    Default Re: try/catch

    ah, clever thanks

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    Super Moderator Json's Avatar
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    Default Re: try/catch

    Be somewhat careful with exceptions though, the specific exception might have been cast to tell you something is wrong which can't really be fixed which will make your method call itself and produce a stack overflow.

    // Json

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    mmm.. coffee JavaPF's Avatar
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    Default Re: try/catch

    Quote Originally Posted by Json View Post
    Be somewhat careful with exceptions though, the specific exception might have been cast to tell you something is wrong which can't really be fixed which will make your method call itself and produce a stack overflow.

    // Json
    Yeah Json is right.

    When you call myMethod in catch, make sure it does something to stop it from throwing the same exception again.
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  6. #6
    Super Moderator helloworld922's Avatar
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    Default Re: try/catch

    You can avoid the potential stack overflow problem with a non-recursive solution (though, again, if you don't follow the above suggestions, it'll create an infinite loop)
    boolean success = false;
    while (!success)
    {
         try
         {
              // code
              success = true;
         }
         catch (Exception e)
         {
              // code
         }
    }