Java String lastIndexOf() Method with Examples (original) (raw)

Last Updated : 19 Nov, 2024

The **String lastIndexOf() method returns the position of the last occurrence of a given character or substring in a String. The Index starts from 0, and if the given substring is not found it **returns -1.

In this article, we will learn how to use the **string lastIndexOf() method in Java to find the last occurrence of a character or substring in a String.

Program to Find the Last Index of a Character in a String in Java

This program demonstrates how to use the lastIndexOf() method to find the position of the last occurrence of a specified character in a given string.

Java `

// Java program to demonstrate the lastIndexOf(char ch) method public class L_index1 { public static void main(String args[]) { // Creating a string String s = new String("Hello World");

    // Printing message before finding last index of 'l'
    System.out.print("Found Last Index of l at: ");
    
    // Finding and printing the last index of 'l'
    System.out.println(s.lastIndexOf('l'));
}

}

`

Output

Found Last Index of l at: 9

Table of Content

• Different Ways to Use lastIndexOf() Method in Java
  • Using lastIndexOf(char ch) Method
  • Finding the Last Index of a Character Example
  • Using lastIndexOf(char ch, int fromIndex) Method
  • Using lastIndexOf(String str) Method
  • Using lastIndexOf(String str, int fromIndex) Method

Different Ways to Use lastIndexOf() Method in Java

There are **four variants of the lastIndexOf() method in Java.

**Parameters:

• **ch: Character value to be searched.
• **fromIndex: index position from where the index of the char value or substring is returned.
• **str: substring to be searched.

**Return Value:

• Last index of char or substring.

Now, lets see examples of all 4 variants of lastIndexOf() method of String class.

Using lastIndexOf(char ch) Method

To demonstrate how to find the last index of a character in a string.

Java `

// Java program to demonstrate the lastIndexOf(char ch) method public class LastIndexOfExample { public static void main(String[] args) {

    // Define a string and a character to search for
    String s = "GeeksforGeeks";
    char ch = 'G';

    // Search for the last occurrence of the character in the string
    int l = s.lastIndexOf(ch);

    // Print the last index of the character
    System.out.println("Last index of '" + ch + "': " + l);
}

}

`

Output

Last index of 'G': 8

Finding the Last Index of a Character Example

To illustrate the last index of ‘g’ in a specific string.

Java `

// Java Program to demonstrate the working of lastIndexOf() public class L_index1 {

public static void main(String args[]) { // Initializing String String s = new String("Welcome to geeksforgeeks");

    System.out.print("Found Last Index of g at: ");

    System.out.println(s.lastIndexOf('g'));
}

}

`

Output

Found Last Index of g at: 19

Using lastIndexOf(char ch, int fromIndex) Method

To show how to find the last index of a character, searching backwards from a specified index.

Java `

// Java Program to demonstrate the working of lastIndexOf(char ch, int fromIndex) Method public class L_index2 {

public static void main(String args[]) {

    // Initializing String
    String s = new String("Welcome to geeksforgeeks");

    System.out.print("Found Last Index of g at: ");

    System.out.println(s.lastIndexOf('g', 15));
}

}

`

Output

Found Last Index of g at: 11

Using lastIndexOf(String str) Method

To demonstrate how to find the last index of a substring in a string.

Java `

// Java Program to demonstrate the working of lastIndexOf(String str) public class L_index3 {

public static void main(String args[]) {

    // Initializing String
    String s = new String("Welcome to geeksforgeeks");

    System.out.print("Found substring geeks at: ");

    System.out.println(s.lastIndexOf("geeks"));
}

}

`

Output

Found substring geeks at: 19

Using lastIndexOf(String str, int fromIndex) Method

To show how to find the last index of a substring, searching backwards from a specified index.

Java `

// Java Program to demonstrate the working of lastIndexOf(String str, int fromIndex) public class L_index4 {

public static void main(String args[]) {

    // Initializing String
    String s = new String("Welcome to geeksforgeeks");
    System.out.print("Found substring geeks at: ");

    // start index of last occurrence of 'geeks' before 15
    System.out.println(s.lastIndexOf("geeks", 15));
}

}

`

Output

Found substring geeks at: 11