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Scala String replaceFirst() method with example

  • Last Updated : 03 Oct, 2019

The replaceFirst() method is same as replaceAll but here only the first appearance of the stated sub-string will be replaced.

Method Definition: String replaceFirst(String regex, String replacement)
Return Type: It returns the stated string after replacing the first appearance of stated regular expression with the string we provide.

Example #1:




// Scala program of replaceFirst()
// method
  
// Creating object
object GfG
  
    // Main method
    def main(args:Array[String])
    {
      
        // Applying replaceFirst method
        val result = "csoNidhimsoSingh".replaceFirst(".so", "##")
          
        // Displays output
        println(result)
      
    }
Output:
##NidhimsoSingh

Example #2:






// Scala program of replaceFirst()
// method
  
// Creating object
object GfG
  
    // Main method
    def main(args:Array[String])
    {
      
        // Applying replaceFirst method
        val result = "NidhimsoSinghcso".replaceFirst(".so", "*")
          
        // Displays output
        println(result)
      
    }
Output:
Nidhi*Singhcso

Example #3:




// Scala program of replaceFirst()
// method
  
// Creating object
object GfG
  
    // Main method
    def main(args:Array[String])
    {
      
        // Applying replaceFirst method
        val result = "fsoNidhimsoSinghcso".replaceFirst(".so", "*")
          
        // Displays output
        println(result)
      
    }
Output:
*NidhimsoSinghcso



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