Remove extra delimiter from a String in Java

Given a String with extra delimiter at the end, the task is to remove this extra delimiter in Java.

Examples:

Input: String = "Geeks, For, Geeks, ", delimiter = ', '
Output: "Geeks, For, Geeks"

Input: String = "G.e.e.k.s.", delimiter = '.'
Output: "G.e.e.k.s"

Approach:

  1. Get the String.
  2. Get the last index of the delimiter using lastIndexOf() method.
  3. Construct a new String with the 2 different substrings: one from beginning till the found index – 1, and the other from the index + 1 till the end.

    Below is the implementation of the above approach:

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    // Java program to remove
    // extra delimiter at the end of a String
      
    public class GFG {
      
        public static void main(String args[])
        {
      
            // Get the String
            String str = "Geeks, For, Geeks,";
      
            // Get the delimiter
            char delimiter = ',';
      
            // Print the original string
            System.out.println("Original String: "
                               + str);
      
            // Get the index of  delimiter
            int index = str.lastIndexOf(delimiter);
      
            // Remove the extra delimiter by skipping it
            str = str.substring(0, index)
                  + str.substring(index + 1);
      
            // Print the new String
            System.out.println("String with extra "
                               + "delimiter removed: "
                               + str);
        }
    }

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    Output:

    Original String: Geeks, For, Geeks,
    String with extra delimiter removed: Geeks, For, Geeks
    


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