Java.lang.Character.isUpperCase() Method



The java.lang.Character.isUpperCase(int codePoint) 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.


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

public static boolean isUpperCase(int codePoint)


  • codePoint - the character (Unicode code point) to be tested

Return Value

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


  • NA


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

package com.tutorialspoint;

import java.lang.*;

public class CharacterDemo {

   public static void main(String[] args) {

      // create 2 int primitives cp1, cp2
      int cp1, cp2;

      // assign values to cp1, cp2
      cp1 = 0x004a; // represents J
      cp2 = 0x0071; // represents x

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

      // check if cp1, cp2 are uppercase and assign results to b1, b2
      b1 = Character.isUpperCase(cp1);
      b2 = Character.isUpperCase(cp2);

      String str1 = "cp1 is uppercase character is " + b1;
      String str2 = "cp2 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:

cp1 is uppercase character is true
cp2 is uppercase character is false