java.lang.Character isUpperCase(int codePoint)


The Character.isUpperCase(int codePoint) java method determines if the specified character (Unicode code point) is an uppercase character.

A character is uppercase if its general category type, provided by getType(codePoint), is UPPERCASE_LETTER, or it has contributory property Other_Uppercase as defined by the Unicode Standard.

The isUpperCase(int codePoint) 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.isUpperCase(int codePoint)

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 isUpperCase() method non statically.

Method Syntax

public static boolean isUpperCase(int codePoint)

Method Argument

Data Type Parameter Description
int codepoint the character (Unicode code point) to be tested.

Method Returns

The isUpperCase(int codePoint) method of Character class returns true if the character is uppercase; false otherwise.


Requires Java 1.5 and up

Java Character isUpperCase(int codePoint) Example

Below is a simple java example on the usage of isUpperCase(int codePoint) method of Character class.


 * This example source code demonstrates the use of 
 * isUpperCase(int codePoint) method of Character class.

public class CharacterIsUpperCaseCodePointExample {

	public static void main(String[] args) {

		// declare a codepoint
		int codepoint = 89;				
		// check if the codepoint is upper case or not
		boolean checkBool = Character.isUpperCase(codepoint);

		// convert codepoint to character
		char ch = (char)codepoint;
		// print result
			System.out.print("User input '"+ch+"' is upper case");
			System.out.print("User input '"+ch+"' is not upper case");


Sample Output

Below is the sample output when you run the above example.

java Character isUpperCase(int codePoint) example output