There are four variants of lastIndexOf() method.This article depicts all of them, as follows:
1. lastIndexOf(): This method returns the index of the last occurrence of the character in the character sequence.
Syntax: int lastIndexOf(char ch) Parameters: ch : a character. Return Value: This method returns the index.
Java
// Java code to demonstrate the// working of lastIndexOf()public class L_index1 {public static void main(String args[]) { // Initialising String String Str = new String("Welcome to neveropen"); System.out.print("Found Last Index of g at : "); // Last index of 'g' will print // prints 19 System.out.println(Str.lastIndexOf('g')); }} |
Output:
Found Last Index of g at : 19
2. lastIndexOf(char ch, int beg) : This method returns the index of the last occurrence of the character in the character sequence represented by this object that is less than or equal to beg, or -1 if the character does not occur before that point.
Syntax: public int lastIndexOf(char ch, int beg) Parameters: ch : a character. beg : the index to start the search from. Returned Value: This method returns the index.
Java
// Java code to demonstrate the// working of lastIndexOf()public class L_index2 {public static void main(String args[]) { // Initialising String String Str = new String("Welcome to neveropen"); System.out.print("Found Last Index of g at : "); // Last index of 'g' before 15 will print // prints 11 System.out.println(Str.lastIndexOf('g', 15)); }} |
Output:
Found Last Index of g at : 11
3. lastIndexOf(String str): This method accepts a String as an argument, if the string argument occurs one or more times as a substring within this object, then it returns the index of the first character of the last such substring is returned. If it does not occur as a substring, -1 is returned.
Syntax: public int lastIndexOf(String str) Parameters: str : a string. Returned Value: This method returns the index.
Java
// Java code to demonstrate the// working of lastIndexOf(String str)public class L_index3 {public static void main(String args[]) { // Initialising String String Str = new String("Welcome to neveropen"); System.out.print("Found substring geeks at : "); // start index of last occurrence of "geeks' // prints 19 System.out.println(Str.lastIndexOf("geeks")); }} |
Output:
Found substring geeks at : 19
4. lastIndexOf(String str, int beg) : This method returns the index within this string of the last occurrence of the specified substring, searching backward starting at the specified index.
Syntax: public int lastIndexOf(String str, int beg) Parameters: beg : the index to start the search from. str : a string. Return Value: This method returns the index.
Java
// Java code to demonstrate the// working of lastIndexOf(String str, int beg)public class L_index4 {public static void main(String args[]) { // Initialising String String Str = new String("Welcome to neveropen"); System.out.print("Found substring geeks at : "); // start index of last occurrence of "geeks' // before 15 // prints 11 System.out.println(Str.lastIndexOf("geeks", 15)); }} |
Output:
Found substring geeks at : 11
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