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Thread: (while) insted of (try and catch)

  1. #1
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    Default (while) insted of (try and catch)

    Hi, could someone help please.

    I need to know how to use while statement instead of try and catch to execute this program please help .

    /*
     * To change this template, choose Tools | Templates
     * and open the template in the editor.
     */
     
    package testtrycatch;
     
    /**
     *
     * @author group4
     */
    public class Main {
     
        /**
         * @param args the command line arguments
         */
        public static void main(String[] args) {
           int i =1;
           int j =0;
     
     
           try { System.out.println("Try block entered " +"i = " + i +" j = " +j);
     
                 System.out.println(i/j);
     
                 System.out.println("Ending try block");
           }
     
           catch (ArithmeticException e)
           {    System.out.println("Arithmetic exception caught ");
     
           }
           System.out.println("After try block ");
           return;
        }
     
    }


  2. #2
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    Default Re: (while) insted of (try and catch)

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  3. #3
    mmm.. coffee JavaPF's Avatar
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    Exclamation Re: (while) insted of (try and catch)

    Quote Originally Posted by Bryan View Post
    Link
    123456
    Although he could easily google a while loop, the problem is with this piece of code. If he doesn't understand what is happening then googling a while loop wont help that much.

    b109 -

    I don't understand why you are looking for a while loop? The try/catch is catching the exception generated here: System.out.println(i/j);

    Without this piece of code, the exception is never generated.

    The program is executed from the main method. What are you trying to achieve with a while loop? More information is needed.

    An example of a while loop is this:

    public class WhileLoopExample {
     
    	public static void main(String[] args) {
     
    		boolean myBoolean = true;
     
    		while(myBoolean){
     
    			System.out.println("JavaProgrammingForums.com");
     
    		}
     
    	}
     
    }

    This code will keep printing JavaProgrammingForums.com to the console until the myBoolean value is changed to false.
    Please use [highlight=Java] code [/highlight] tags when posting your code.
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  4. The Following 2 Users Say Thank You to JavaPF For This Useful Post:

    b109 (June 2nd, 2010), javanub:( (May 13th, 2010)

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    Default Re: (while) insted of (try and catch)

    why dun wanna use try catch

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    Default Re: (while) insted of (try and catch)

    well, there is the whole issue of looping. try/catch blocks execute the code inside them only once/call. Also, try/catch blocks are fairly slow (depending on the situation, can take milli-seconds where simple value checking using if/else or other conditionals are maybe an order or two of magnitude faster). If you want a pseudo replacement for try/catch, use if/else statements for the comparisons and handle the code flow as needed.

    The only time you really should be using try/catch blocks is when there is a situation that you don't want a method to handle a certain type of situations, usually from bad data passed in.

  7. The Following 2 Users Say Thank You to helloworld922 For This Useful Post:

    javanub:( (May 13th, 2010), Json (May 13th, 2010)

  8. #6
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    Default Re: (while) insted of (try and catch)

    Good answer helloworld

    // Json

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    Default Re: (while) insted of (try and catch)

    i see. thankyou for your enlightenment

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