StringBuffer reverse() Method in Java with Examples
The Java.lang.StringBuffer.reverse() is an inbuilt method which is used to reverse the characters in the StringBuffer. The method causes this character sequence to be replaced by the reverse of the sequence.
Syntax :
public StringBuffer reverse()
Parameters : The method does not take any parameter .
Return Value : The method returns the StringBuffer after reversing the characters.
Examples :
Input: StringBuffer = GeeksforGeeks Output = !skeegrofskeeG Input: StringBuffer = Hello World Output = !dlroW olleH
Below programs illustrate the java.lang.StringBuffer.reverse() method:
Program 1:
// Java praogram to illustrate the // java.lang.StringBuffer.reverse() import java.lang.*; public class Test { public static void main(String args[]) { StringBuffer sbf = new StringBuffer("Geeksforgeeks!"); System.out.println("String buffer = " + sbf); // Here it reverses the string buffer sbf.reverse(); System.out.println("String buffer after reversing = " + sbf); } } |
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Output:
String buffer = Geeksforgeeks! String buffer after reversing = !skeegrofskeeG
Program 2:
// Java praogram to illustrate the // java.lang.StringBuffer.reverse() import java.lang.*; public class Test { public static void main(String args[]) { StringBuffer sbf = new StringBuffer("1 2 3 4 5 6 7 8 9 10"); System.out.println("String buffer = " + sbf); // Here it reverses the string buffer sbf.reverse(); System.out.println("String buffer after reversing = " + sbf); } } |
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Output:
String buffer = 1 2 3 4 5 6 7 8 9 10 String buffer after reversing = 01 9 8 7 6 5 4 3 2 1
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