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Thread: replacing subString

  1. #1
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    Default replacing subString

    package test852010;

    why this code sometimes work properly and sometimes doesn't? some times it doesn't remove "class" from the original String(l)
    public class test {
     
     
    	static String l = new String("href=http://en.wikipedia.org/wiki/Videoconferencing"+ " class="+"l");
     
    	public static void main(String[] args) {
     
    		if (l.contains("class=")){
    			l.replace("class=","");
    			System.out.println(l);
     
    		}
     
    		else 
    			System.out.println("No");
    	}
     
    }


  2. #2
    Super Moderator helloworld922's Avatar
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    Default Re: replacing subString

    Strings in Java are immutable, so you must re-assign the value returned from l.replace() to l. Otherwise, l will never be changed.

    public class test {
     
     
    	static String l = new String("href=http://en.wikipedia.org/wiki/Videoconferencing"+ " class="+"l");
     
    	public static void main(String[] args) {
     
    		if (l.contains("class=")){
    			l = l.replace("class=","");
    			System.out.println(l);
     
    		}
     
    		else 
    			System.out.println("No");
    	}
     
    }

  3. The Following User Says Thank You to helloworld922 For This Useful Post:

    nasi (May 22nd, 2010)

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