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Thread: If statement not returning anything

  1. #1
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    Question If statement not returning anything

    import java.net.*;
    import java.io.*;
     
    public class Foo{
    	public static void main (String[] args)
    	{
    		try {
    				InetAddress thisIp = InetAddress.getLocalHost();	
    				String[] result = thisIp.getHostAddress().split("[.]");
    				String IPAddr = (result[0] + "." + result[1] + "." + result[2]);
     
     
     
    					for (int i = 1; i < 256; i ++)
    					{
    					//For loop
    						String IPAddress = (IPAddr + "." + i);
    						System.out.println(IPAddress);
    						if (IPAddress == (result[0] + "." + result[1] + "." + result[2] + "." + result[3]))
    						{
    						System.out.println("IP FOUND");
    						}
     
    					}
    			} 
    				catch (Exception e)
    			{
    				e.printStackTrace();
    			}
    	}
    }


    I'm not sure why this isn't working, the IF statement doesn't return anything to the console.

    Any ideas?

    Thanks a bunch!


  2. #2
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    Default Re: If statement not returning anything

    1.) It only prints, not returns anything.

    2.) Even if it did, main is void so it can't return anything.

    3.) For a String, use the .equals method.

  3. The Following User Says Thank You to javapenguin For This Useful Post:

    Jonathan_C (November 15th, 2010)

  4. #3
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    Default Re: If statement not returning anything

    try

    if (IPAddress.equals(......))

  5. The Following User Says Thank You to javapenguin For This Useful Post:

    Jonathan_C (November 15th, 2010)

  6. #4
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    Smile Re: If statement not returning anything

    Thanks
    That worked perfectly!
    Last edited by Jonathan_C; November 15th, 2010 at 03:02 PM.

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