The Java string toUpperCase() method of the String class has converted all characters of the string into an uppercase letter. There is two variant of toUpperCase() method. The key thing that is to be taken into consideration is toUpperCase() method worked the same as to UpperCase(Locale.getDefault()) method as internally default locale is used.
Syntax of toUpperCase Java
public String toUpperCase(Locale loc) public String toUpperCase()
Parameters
- Type 1: Locale value to be applied as it converts all the characters into
- Type 2: NA
Return Type
- It returns the string in uppercase letters.
Note: Lowercase is done using the rules of the given Locale.
Example of toUpperCase Java
java
// Java Program to Demonstrate Working of toUpperCase()// method// Main classclass GFG { // Main driver method public static void main(String args[]) { // Custom input string String str = "Welcome! to Geeksforgeeks"; // Converting above input string to // uppercase letters using UpperCase() method String strup = str.toUpperCase(); // Print the uppercased string System.out.println(strup); }} |
Output
WELCOME! TO GEEKSFORGEEKS
Java String toUpperCase(Locale locale) Example
The toUpperCase(Locale locale) method returns a new String object which is the original string in upper case with respect to the Locale method parameter.
Below is the Implementation of the above method:
java
// Java program to demonstrate Working of toUpperCase()// method of Locale class// Importing Locale class from java.util packageimport java.util.Locale;// Main classclass GFG { // Main driver method public static void main(String args[]) { // Custom input string String str = "Geeks for Geeks"; // Locales with the language "tr" for TURKISH //"en" for ENGLISH is created Locale TURKISH = Locale.forLanguageTag("tr"); Locale ENGLISH = Locale.forLanguageTag("en"); // Converting string str to uppercase letter // using TURKISH and ENGLISH language String strup1 = str.toUpperCase(TURKISH); String strup2 = str.toUpperCase(ENGLISH); System.out.println(strup1); System.out.println(strup2); }} |
Output
GEEKS FOR GEEKS GEEKS FOR GEEKS
