Checks whether the supplied character is a letter. - Java java.lang

Java examples for java.lang:Assert

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Description

Checks whether the supplied character is a letter.

Demo Code

/* //www . j a v a  2 s.  com
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 * See the NOTICE.txt file distributed with this work for additional 
 * information regarding copyright ownership. 
 *
 * Aduna licenses this file to you under the terms of the Aduna BSD 
 * License (the "License"); you may not use this file except in compliance 
 * with the License. See the LICENSE.txt file distributed with this work 
 * for the full License.
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 * distributed under the License is distributed on an "AS IS" BASIS, 
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 * and limitations under the License.
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//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        int c = 2;
        System.out.println(isLetter(c));
    }

    /**
     * Checks whether the supplied character is a letter.
     */
    public static boolean isLetter(int c) {
        return isUpperCaseLetter(c) || isLowerCaseLetter(c);
    }

    /**
     * Checks whether the supplied character is an upper-case letter.
     */
    public static boolean isUpperCaseLetter(int c) {
        return (c >= 65 && c <= 90); // A - Z
    }

    /**
     * Checks whether the supplied character is an lower-case letter.
     */
    public static boolean isLowerCaseLetter(int c) {
        return (c >= 97 && c <= 122); // a - z
    }
}

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