Replace String Example in Java

/**
 * @author Mallikarjun G
 *
 */
public class JavaStringReplaceExample {
    /**
     * @param args
     */
    public static void main(String args[]) {      
        String str = "Replace String";
        System.out.println(str.replace('R', 'A'));// Replaceing R with a in str
        System.out.println(str.replaceFirst("Re", "Ra"));// Replaceing First Re with Ra in str  
        System.out.println(str.replaceAll("Re", "Ra")); // Replaceing All Re with Ra in str   

    }


}