Java.lang.Character.isLowerCase() Method



The java.lang.Character.isLowerCase(char ch) determines if the specified character is a lowercase character.

A character is lowercase if its general category type, provided by Character.getType(ch), is LOWERCASE_LETTER, or it has contributory property Other_Lowercase as defined by the Unicode Standard.


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

public static boolean isLowerCase(char ch)


ch − the character to be tested

Return Value

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




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

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 = 'A';
      ch2 = 'a';

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

      // check if ch1, ch2 are in lowercase and assign results to b1, b2
      b1 = Character.isLowerCase(ch1);
      b2 = Character.isLowerCase(ch2);

      String str1 = ch1 + " is a lowercase character is " + b1;
      String str2 = ch2 + " is a lowercase 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 −

A is a lowercase character is false
a is a lowercase character is true