package String; public class StringBufferBuilderExamples { public static void main(String[] args) { // StringBuffer and StringBuilder are used when you want to modify // object values. StringBuffer stringbuffer = new StringBuffer("12345"); stringbuffer.append("6789"); System.out.println(stringbuffer); // 123456789 // All StringBuffer methods modify the value of the object. StringBuilder sb = new StringBuilder("0123456789"); // StringBuilder delete(int startIndex, int endIndexPlusOne) System.out.println(sb.delete(3, 7));// 012789 StringBuilder sb1 = new StringBuilder("abcdefgh"); // StringBuilder insert(int indext, String whatToInsert) System.out.println(sb1.insert(3, "ABCD"));// abcABCDdefgh StringBuilder sb2 = new StringBuilder("abcdefgh"); // StringBuilder reverse() System.out.println(sb2.reverse());// hgfedcba // Similar functions exist in StringBuffer also // All functions also return a reference to the object after modifying // it. // This allows a concept called method chaining. StringBuilder sb3 = new StringBuilder("abcdefgh"); System.out.println(sb3.reverse().delete(5, 6).insert(3, "---"));// hgf---edba } }