java异常处理和继续

Question

I have a Java Program where I get data from a different source. some times while reading I see Exception and the program is exiting. Mine is in a program that runs every 10minutes.

Public static void main(Strings[] args)
{
...readsource();
}

Private static void readsource() throws IOException
{
...
}

Issue: I am able to get/See the Exception. But I want the program to continue To that what is the best logic? I dont see try-catch-finally also is not addressing ..I want the program to continue even after seing the exception (I mean the next iteration should continue). This looks to be a Basic issue not sure how to address this...

Answer 1

Then you need to catch the exception, which you are currently not doing.

try  {
    readsource();
} catch (IOException e) {
   // do something, never catch an exception and not do anything
}

//continue.

Note that exceptions usually indicate something is wrong. Unless you are going to do something about the exception, it might be better to fix the condition causing the exception....

Answer 2

You have to provide an error handler in your method, ie surround the call to readsource() with a try-catch block.

   public static void main(Strings[] args)
   {
      try{
         ...readsource();
      }
      catch(IOException ioe){
           //handle the error here,e.g don't do anything or simply log it
      }
    }

Answer 3

如果您没有在catch块中抛出异常，则执行将从该catch块的末尾掉落并继续执行，就好像没有异常一样。

Answer 4

If you mean you'd like to recall the method wether an Exception was thrown or not just place this in a while loop ie:

Public static void main(Strings[] args)
{
    boolean run=true;
    while(run) {
    try {
            System.out.print("Hello,");
            readsource();
            throw new IOException();
            if(1==2)run=false;//stop the loop for whatever condition
        } catch(IOException ioe) {
            ioe.printStackTrace();
        }
        System.out.println(" world!");
    }
   }

}

Private static void readsource() throws IOException
{
...
}