Java String Whitespace Delete deleteWhitespace(String str)

Description

Deletes all whitespaces from a String.

Whitespace is defined by Character#isWhitespace(char) .

License

Apache License

Parameter

Parameter	Description
str	String target to delete whitespace from

Exception

Parameter	Description
NullPointerException	an exception

Return

the String without whitespaces

Declaration

public static String deleteWhitespace(String str) 

Method Source Code

//package com.java2s;
/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2002 The Apache Software Foundation.  All rights
 * reserved./*from w  w  w .j a va2s  .c  o  m*/
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
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 *    distribution.
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 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.codehaus.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
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 * 4. The names "The Jakarta Project", "Commons", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
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 *    permission, please contact codehaus@codehaus.org.
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 * 5. Products derived from this software may not be called "Apache"
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 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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 * This software consists of voluntary contributions made by many
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 */

public class Main {
    /**
     * <p>Deletes all whitespaces from a String.</p>
     *
     * <p>Whitespace is defined by
     * {@link Character#isWhitespace(char)}.</p>
     *
     * @param str String target to delete whitespace from
     * @return the String without whitespaces
     * @throws NullPointerException
     */
    public static String deleteWhitespace(String str) {
        StringBuilder buffer = new StringBuilder();
        int sz = str.length();
        for (int i = 0; i < sz; i++) {
            if (!Character.isWhitespace(str.charAt(i))) {
                buffer.append(str.charAt(i));
            }
        }
        return buffer.toString();
    }

    /**
     * <p>Checks if the String contains only whitespace.</p>
     *
     * <p><code>null</code> will return <code>false</code>. An
     * empty String will return <code>true</code>.</p>
     *
     * @param str the String to check
     * @return <code>true</code> if only contains whitespace, and is non-null
     */
    public static boolean isWhitespace(String str) {
        if (str == null) {
            return false;
        }
        int sz = str.length();
        for (int i = 0; i < sz; i++) {
            if ((Character.isWhitespace(str.charAt(i)) == false)) {
                return false;
            }
        }
        return true;
    }
}

Related

1. deleteWhitespace(String str)
2. deleteWhitespace(String str)
3. deleteWhitespace(String str)
4. deleteWhitespace(String str)
5. deleteWhitespace(String str)
6. deleteWhitespace(String str)
7. deleteWhitespace(String string)
8. deleteWhitespaces(final String string)
9. deleteWhiteSpaces(String nodeValue)