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

Other String Function Examples

Knowledge Centre
When to use LinkedList or ArrayList?
Accessing elements are faster with ArrayList, because it is index based. But accessing is difficult with LinkedList. It is slow access. This is to access any element, you need to navigate through the elements one by one. But insertion and deletion is much faster with LinkedList, because if you know the node, just change the pointers before or after nodes. Insertion and deletion is slow with ArrayList, this is because, during these operations ArrayList need to adjust the indexes according to deletion or insetion if you are performing on middle indexes. Means, an ArrayList having 10 elements, if you are inserting at index 5, then you need to shift the indexes above 5 to one more.
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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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