Program to replace character from the String using user defined method.

package com.JavaInterview.Programs;

/*How to replace characters from a string using user defined method .Here we have use  StringBuffer * ,you can also use StringBuilder.

*

* @author:http://javainterviewprograms.blogspot.in/
* 
*/
public class CharacterReplace2 {

 //User method to replace characters from a string

 public static String replace(String s,char from,char to)

 {

  StringBuffer str=new StringBuffer(s.length());

 

  for(int i=0;i<s.length();i++)

  {

   if(s.charAt(i)==from)

   {

    str.append(to);

   }

   else

   {

    str.append(s.charAt(i));

   }

  }

  return str.toString();

 }

 public static void main(String args[])

 {

  String original="This is a JIP Example String";

 

  System.out.println("Original String : "+original);

 

  

  String changed=replace(original, 'i','*');

 

  System.out.println("Changed String :" + changed);

 }

}

Output:

Original String : This is a JIP Example String

Changed String :Th*s *s a JIP Example Str*ng