Java – String lastIndexOf() Method example

In the last tutorial we discussed indexOf() method. In this tutorial we will discuss lastIndexOf() method which is used for finding out the index of last occurrence of a char/sub-string in a particular String.
Variations:
int lastIndexOf(int ch): It returns the last occurrence of character ch in the particular String.
int lastIndexOf(int ch, int fromIndex): It returns the last occurrence of ch, starting searching backward from the specified index “fromIndex”.
int lastIndexOf(String str): Returns the last occurrence of str in a String.
int lastIndexOf(String str, int fromIndex): Returns the last occurrence of str, starting searching backward from the specified index “fromIndex”.

Example of lastIndexOf() method

public class LastIndexOfExample{
   public static void main(String args[]) {
       String str1 = new String("This is a BeginnersBook tutorial");
       String str2 = new String("Beginners");
       String str3 = new String("Book");
       String str4 = new String("Books");
       System.out.println("Last 'B' in str1: "+str1.lastIndexOf('B'));
       System.out.println("Last 'B' in str1 whose index<=15:"+str1.lastIndexOf('B', 15));
       System.out.println("Last 'B' in str1 whose index<=30:"+str1.lastIndexOf('B', 30));
       System.out.println("Last occurrence of str2 in str1:"+str1.lastIndexOf(str2));
       System.out.println("Last occurrence of str2 in str1 before 15:"+str1.lastIndexOf(str2, 15));
       System.out.println("Last occurrence of str3 in str1:"+str1.lastIndexOf(str3));
       System.out.println("Last occurrence of str4 in str1"+str1.lastIndexOf(str4));
       System.out.println("Last occurrence of 'is' in str1:"+str1.lastIndexOf("is"));
       System.out.println("Last occurrence of 'is' in str1 before 4:"+str1.lastIndexOf("is", 4));
   }
}

Output:

Last 'B' in str1: 19
Last 'B' in str1 whose index<=15:10
Last 'B' in str1 whose index<=30:19
Last occurrence of str2 in str1:10
Last occurrence of str2 in str1 before 15:10
Last occurrence of str3 in str1:19
Last occurrence of str4 in str1-1
Last occurrence of 'is' in str1:5
Last occurrence of 'is' in str1 before 4:2