Java String toLowerCase() method is used and operated over a string where we want to convert all letters to lowercase in a string.
Methods of String toLowerCase()
There are two types of toLowerCase() methods as follows:
- toLowerCase()
- toLowerCase(Locale loc): Converts all the characters into lowercase using the rules of the given Locale.
Note: Internally toLowerCase() works in similar way as toLowerCase(Locale.getDefault()) method.
Syntax of toLowerCase()
public String toLowerCase () public String toLowerCase (Locale loc)
The package view of the method is as follows:
--> java.util Package
--> String Class
--> toLowerCase() Method
Parameters
- Locale value to be applied.
Return Value
- Returns a string in lowercase letter.
Example Java toLowerCase()
Example 1:
java
// Java Program to Demonstrate Working of// toLowerCase() Method of String Class// Importing required classesimport java.util.*;// Main classclass GFG { // Main driver method public static void main(String args[]) { // Custom input string String s = "Geeks for Geeks"; // Converting string s to lowercase letter String s2 = s.toLowerCase(); // Printing the lowercase string corresponding // to input string System.out.println(s2); }} |
Output
geeks for geeks
Example 2:
java
// Java program to demonstrate Working of toLowerCase()// Method present inside Locale class// Importing required classesimport java.util.Locale;// Main classclass GFG { // Main driver method public static void main(String args[]) { // Custom input string String s = "I Know YOI Bui You Don't Know ME"; // Locales with the language "tr" for TURKISH //"en" for ENGLISH is created Locale TURKISH = Locale.forLanguageTag("tr"); Locale ENGLISH = Locale.forLanguageTag("en"); // Converting string s to lowercase letter // using TURKISH and ENGLISH language String gfg2 = s.toLowerCase(TURKISH); String gfg3 = s.toLowerCase(ENGLISH); // Printing above string System.out.println(gfg2); System.out.println(gfg3); }} |
Output
ı know yoı bui you don't know me i know yoi bui you don't know me
