java.lang.Character toUpperCase(char ch)
Description
Note that Character.isUpperCase(Character.toUpperCase(ch)) does not always return true for some ranges of characters, particularly those that are symbols or ideographs.
In general, String.toUpperCase() should be used to map characters to uppercase. String case mapping methods have several benefits over Character case mapping methods. String case mapping methods can perform locale-sensitive mappings, context-sensitive mappings, and 1:M character mappings, whereas the Character case mapping methods cannot.
This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the toUpperCase(int) method.
The toUpperCase(char ch) method of Character class is static thus it should be accessed statically which means the we would be calling this method in this format:
Character.toUpperCase(char ch)
Non static method is usually called by just declaring method_name(argument) however in this case since the method is static, it should be called by appending the class name as suffix. We will be encountering a compilation problem if we call the java toUpperCase() method non statically.
Method Syntax
public static char toTitleCase(char ch)
Method Argument
| Data Type | Parameter | Description |
|---|---|---|
| char | ch | the character to be converted. |
Method Returns
The toUpperCase(char ch) method of Character class returns the uppercase equivalent of the character, if any; otherwise, the character itself.
Compatibility
Requires Java 1.0 and up
Java Character toUpperCase(char ch) Example
Below is a simple java example on the usage of toUpperCase(char ch) method of Character class.
package com.javatutorialhq.java.examples;
import java.util.Scanner;
/*
* This example source code demonstrates the use of
* toUpperCase(char ch) method of Character class.
*/
public class CharacterToUpperCaseCharExample {
public static void main(String[] args) {
// Ask for user input
System.out.print("Enter an input:");
// use scanner to get the user input
Scanner s = new Scanner(System.in);
// get a single character
char[] value = s.nextLine().toCharArray();
// close the scanner object
s.close();
// convert user input to upper case
for(char ch:value){
char chUpper = Character.toUpperCase(ch);
// print the result
System.out.println("character "+ch +" Upper case is " +chUpper);
}
}
}
Sample Output
Below is the sample output when you run the above example.
