Java.lang.Character.isUpperCase() Method



The java.lang.Character.isUpperCase(char ch) determines if the specified character is an uppercase character.

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.


Following is the declaration for java.lang.Character.isUpperCase() method

public static boolean isUpperCase(char ch)


ch − the character to be tested

Return Value

This method returns true if the character is uppercase, false otherwise.




The following example shows the usage of lang.Character.isUpperCase() method.

Live Demo
package com.tutorialspoint;

import java.lang.*;

public class CharacterDemo {

   public static void main(String[] args) {

      // create 2 char primitives ch1, ch2
      char ch1, ch2;

      // assign values to ch1, ch2
      ch1 = 'K';
      ch2 = '\u0e16'; // represents THAI CHARACTER THO THUNG

      // create 2 boolean primitives b1, b2
      boolean b1, b2;

      // check if ch1, ch2 are uppercase and assign results to b1, b2
      b1 = Character.isUpperCase(ch1);
      b2 = Character.isUpperCase(ch2);

      String str1 = ch1 + " is uppercase character is " + b1;
      String str2 = "ch2 is uppercase character is " + b2;

      // print b1, b2 values
      System.out.println( str1 );
      System.out.println( str2 );

Let us compile and run the above program, this will produce the following result −

K is uppercase character is true
ch2 is uppercase character is false