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# Java Examples - Replace first occourance of a String

## Problem Description:

How to count replace first occourance of a String?

## Solution:

Following example demonstrates how to replace first occourance of a String in a String using replaceFirst() method of a Matcher class.

    import java.util.regex.Matcher;
    import java.util.regex.Pattern;

    public class Main {
       public static void main(String args[]) {
          Pattern p = Pattern.compile("hello");
          String instring = "hello hello hello.";
          System.out.println("initial String: "+ instring);
          Matcher m = p.matcher(instring);
          String tmp = m.replaceFirst("Java");
          System.out.println("String after replacing 1st Match: "
          +tmp);
       }
    }

## Result:

The above code sample will produce the following result.

    initial String: hello hello hello.
    String after replacing 1st Match: Java hello hello.

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