Replace/remove character in a String

Replace/remove character in a String

To replace all occurences of a given character :

String   tmpString = myString.replace( '\'', '*' );
System.out.println( "Original = " + myString );
System.out.println( "Result   = " + tmpString );

To replace a character at a specified position :

public static String replaceCharAt(String s, int pos, char c) {
   return s.substring(0,pos) + c + s.substring(pos+1);
}

To remove a character :

public static String removeChar(String s, char c) {
   String r = "";
   for (int i = 0; i < s.length(); i ++) {
      if (s.charAt(i) != c) r += s.charAt(i);
      }
   return r;
}

To remove a character at a specified position:

public static String removeCharAt(String s, int pos) {
   return s.substring(0,pos)+s.substring(pos+1);
}

Check this Optimize How-to for a more efficient String handling technique.

New with JDK1.4, the String class offers the replaceAll() method that can be used with String or char.

String.replaceAll("\n", "");    // Remove all \n
String.replaceAll("\n", "\r");  // Replace \n by \r

Thanks to jsanza for the tip!