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Java Character isUpperCase(char ch) Method

Java isUpperCase(char ch) method is a part of Character class. This method is used to check whether the specified character is an uppercase character or not.

This method does not support supplementary characters. A character is uppercase if its general category type, provided by Character.getType(ch), is UPPERCASE_LETTER. or it has contributory property Other_Uppercase as defined by the Unicode Standard.


public static boolean isUpperCase(char ch)


The parameter passed is the character to be checked whether it is an uppercase character.


Returns the boolean value true if the specified character is an uppercase character else return false.

Example 1:

Here, the characters are checked whether they are uppercase characters or not.

public class StudyTonight
	public static void main(String[] args)
		char ch1 = '0';  
		char ch2 = 'd';  
		char ch3 = 'D';  
		char ch4 = 'k';   
		char ch5 = 'P';  

		boolean b1 = Character.isUpperCase(ch1);  
		boolean b2 = Character.isUpperCase(ch2);  
		boolean b3 = Character.isUpperCase(ch3);  
		boolean b4 = Character.isUpperCase(ch4);  
		boolean b5 = Character.isUpperCase(ch5);  

		System.out.println(ch1 +" is uppercase character??:  "+b1);  
		System.out.println(ch2 +" is uppercase character??:  "+b2);  
		System.out.println(ch3 +" is uppercase character??:  "+b3);  
		System.out.println(ch4 +" is uppercase character?? : "+b4);  
		System.out.println(ch5 +" is uppercase character??:  "+b5);  

0 is uppercase character??: false
d is uppercase character??: false
D is uppercase character??: true
k is uppercase character?? : false
P is uppercase character??: true

Example 2:

Here is a user-defined example where anyone using this code can put a value of his choice and get the equivalent output.

import java.util.Scanner; 
public class StudyTonight
	public static void main(String[] args)
			System.out.print("Enter the character: ");  
			Scanner sc = new Scanner(;         
			char ch =;  
			boolean b = Character.isUpperCase(ch);
			System.out.println(ch + " is a uppercase character??: "+b);
		catch(Exception e)
			System.out.println("Invalid Input!!");

Enter the character: e
e is a uppercase character??: false
Enter the character: U
U is a uppercase character??: true

Live Example:

Here, you can test the live code example. You can execute the example for different values, even can edit and write your examples to test the Java code.

About the author:
A Computer Science and Engineering Graduate(2016-2020) from JSSATE Noida. JAVA is Love. Sincerely Followed Sachin Tendulkar as a child, M S Dhoni as a teenager, and Virat Kohli as an adult.