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Java - String lastIndexOf() Method



The Java string lastIndexOf() method is used to find out the index number for last occurrence of specified character or substring in the given string or specified substring of the given string ending at the specified index.

Syntax

public int lastIndexOf(int ch)
public int lastIndexOf(int ch, int fromIndex)
public int lastIndexOf(String str)
public int lastIndexOf(String str, int fromIndex)

Parameters

ch specify the character to search for.
str specify the substring to search for.
fromIndex specify the index from which to start the search in backward direction.

Return Value

Returns the index number for last occurrence of specified character or string. Returns -1 if there is no such occurrence.

Exception

NA.

Example:

In the example below, lastIndexOf() method is used to find out the index number for last occurrence of specified character in the given string.

public class MyClass {
  public static void main(String[] args) {
    String MyString = "Java is a programming language. Learning Java is fun.";
    
    //index number of last occurrence 
    //of 'J' in the given string
    System.out.println(MyString.lastIndexOf('J'));

    //index number of last occurrence 
    //of 'J' in the given substring
    System.out.println(MyString.lastIndexOf('J', 20));   
  }
}

The output of the above code will be:

41
0

Example:

Here, the lastIndexOf() method is used to find out the index number for last occurrence of specified substring in the given string.

public class MyClass {
  public static void main(String[] args) {
    String MyString = "Java is a programming language. Learning Java is fun.";
    
    //index number of last occurrence 
    //of "is" in the given string
    System.out.println(MyString.lastIndexOf("is"));

    //index number of last occurrence 
    //of "is" in the given substring
    System.out.println(MyString.lastIndexOf("is", 20));   
  }
}

The output of the above code will be:

46
5

❮ Java String Methods

5