JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Java String lastIndexOf() Sample Code


Description:

Below example shows how to get index of a given character or string from a string in the reverse order, means last occuring index. By using lastIndexOf() method you can get last occurence of the the reference string or character. Also lastIndexOf() method gives last occurence based on a specific position.


Code:
package com.myjava.string;

public class MyStrLastIndexOf {

    public static void main(String a[]){
    
        String str = "Use this string for testing this";
        System.out.println("Basic lastIndexOf() example");
        System.out.println("Char 's' at last occurance: "+str.lastIndexOf('s'));
        System.out.println("String \"this\" at last occurance: "+str.lastIndexOf("this"));
        /**
         * Returns the last occurance from specified start index, 
         * searching backward starting at the specified index.
         */
        System.out.println("first occurance of char 's' from 24th index backwards: "
							+str.lastIndexOf('s',24));
        System.out.println("First occurance of String \"this\" from 26th index backwards: "
							+str.lastIndexOf("this",26));
    }
}

Example Output

Basic lastIndexOf() example
Char 's' at last occurance: 31
String "this" at last occurance: 28
first occurance of char 's' from 24th index backwards: 22
First occurance of String "this" from 26th index backwards: 4

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We know that String is immutable object. We can not change the value of a String object once it is initiated. If we try to change the value of the existing String object then it creates new object rather than changing the value of the existing object. So incase, we are going to do more modificatios on String, then use StringBuffer. StringBuffer updates the existing objects value, rather creating new object.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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