Example on StringBuilder in java

EXAMPLE 1 : Given a String "Maj1e4s57ti3c" You have to remove only digits from the given String to form a new String without any digit.

public class StrBuildr {

       public static void main(String args[]){

              String s = "Maj1e4s57ti3c";

              char[] cs = s.toCharArray();

             

              StringBuilder sb = new StringBuilder();

             

              for (char c : cs) {

                     if(!Character.isDigit(c)){

                           sb = sb.append(c);

                     }

              }

              String finalStr = sb.toString();

              System.out.println("After removing digits : "+ finalStr);

       }

}   

OUTPUT :
After removing digits : Majestic  

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• Example on StringBuffer
• Difference between StringBuffer & StringBuilder
• Why is String immutable?
• Overriding toString() method