Android String Value Check isWhitespace(final String s)

Here you can find the source of isWhitespace(final String s)

Description

Returns true if the specified string consists entirely of whitespace characters.

License

Apache License

Parameter

Parameter Description
s string to test.

Return

true if the specified string consists entirely of whitespace characters, false otherwise.

Declaration

public static boolean isWhitespace(final String s) 

Method Source Code

//package com.java2s;
/****************************************************************
 * Licensed to the Apache Software Foundation (ASF) under one   *
 * or more contributor license agreements.  See the NOTICE file *
 * distributed with this work for additional information        *
 * regarding copyright ownership.  The ASF licenses this file   *
 * to you under the Apache License, Version 2.0 (the            *
 * "License"); you may not use this file except in compliance   *
 * with the License.  You may obtain a copy of the License at   *
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 * Unless required by applicable law or agreed to in writing,   *
 * software distributed under the License is distributed on an  *
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
 * KIND, either express or implied.  See the License for the    *
 * specific language governing permissions and limitations      *
 * under the License.                                           *
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public class Main {
    /** US-ASCII CR, carriage return (13) */
    public static final int CR = '\r';
    /** US-ASCII LF, line feed (10) */
    public static final int LF = '\n';
    /** US-ASCII SP, space (32) */
    public static final int SP = ' ';
    /** US-ASCII HT, horizontal-tab (9)*/
    public static final int HT = '\t';

    /**//from   www .ja  v  a  2  s  .c  om
     * Returns <code>true</code> if the specified character is a whitespace
     * character (CR, LF, SP or HT).
     *
     * ANDROID:  COPIED FROM A NEWER VERSION OF MIME4J
     *
     * @param ch
     *            character to test.
     * @return <code>true</code> if the specified character is a whitespace
     *         character, <code>false</code> otherwise.
     */
    public static boolean isWhitespace(char ch) {
        return ch == SP || ch == HT || ch == CR || ch == LF;
    }

    /**
     * Returns <code>true</code> if the specified string consists entirely of
     * whitespace characters.
     *
     * ANDROID:  COPIED FROM A NEWER VERSION OF MIME4J
     *
     * @param s
     *            string to test.
     * @return <code>true</code> if the specified string consists entirely of
     *         whitespace characters, <code>false</code> otherwise.
     */
    public static boolean isWhitespace(final String s) {
        if (s == null) {
            throw new IllegalArgumentException("String may not be null");
        }
        final int len = s.length();
        for (int i = 0; i < len; i++) {
            if (!isWhitespace(s.charAt(i))) {
                return false;
            }
        }
        return true;
    }
}