CODEWITHSUNDEEP
javastringequals
Ferry
Ferry

Reputation: 13

Equals result false in edited string

I tried to compare 2 string with the code:

public class MyClass
{
  public static void main(String args[])
  {
    String xhex="31 38 30 2E 32 35 35 2E 32 32 35 2E 31 32 33";
    String hex =  remspace(xhex).trim().toString();
    System.out.println(hex);
    String hex1="3138302E3235352E3232352E313233";
    System.out.println(hex1);
    if(hex.trim().equalsIgnoreCase(hex1.trim()))
    //if (hex.equals(hex1))
      {
        System.out.println("equals");
      }else
      {
        System.out.println("not equals");
      }
}

private static String remspace(String data)
    {
      String xdata = null;
      char c='\0';
      String hex = data.replace(' ',c);
      return hex;
    }
}

the result is :

3138302E3235352E3232352E313233
3138302E3235352E3232352E313233
not equals

as we can see the result is identically equals but when i tried to compare the string using equals the result is not equals. any idea why did it considered as not equals ?

Upvotes: 0

Views: 166

Answers (2)

NeplatnyUdaj
NeplatnyUdaj

Reputation: 6242

This works for me:

public static String removeWhitespaces(String source){
    char[] chars = new char[source.length()];
    int numberOfNewlines = 0;
    for (int i = 0; i<chars.length; i++){
        if (source.charAt(i)==' ')
            numberOfNewlines++;
        else
            chars[i-numberOfNewlines]=source.charAt(i);
    }
    return new String(chars).substring(0, source.length()-numberOfNewlines);
}

Upvotes: 0

Adam Siemion
Adam Siemion

Reputation: 16039

They are not identical, the first string has '\0' in places where the space used to be. They are just displayed on the console as identical because '\0' is not displayed.

If you want the space to be removed use, change the remspace method to:

private static String remspace(String data) {
    return data.replace(" ", "");
}

Upvotes: 8

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