CODE EXAMPLE FOR JAVA

how to change the character of a string in java

// You cannot change the characters of a string in java
// But you can make it work
// For Example: A Program to change 'r' to 'a'
class Main{
  public static void main(String args[]){
    String str = "return";
    String res = "";
    for(int i = 0; i<str.length(); i++){
      if(str.charAt(i)=='r'){
        res+='a';
      }
      else{
        res+=str.charAt(i);
      }
    }
    System.out.print("Result = "+res);
  }
}