Mega Code Archive
Converts a String to a Boolean
<![CDATA[
/*
* 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.
*/
/**
* <p>Operations on boolean primitives and Boolean objects.</p>
*
* <p>This class tries to handle <code>null</code> input gracefully.
* An exception will not be thrown for a <code>null</code> input.
* Each method documents its behaviour in more detail.</p>
*
* @author Stephen Colebourne
* @author Matthew Hawthorne
* @author Gary Gregory
* @since 2.0
* @version $Id: BooleanUtils.java 589050 2007-10-27 05:07:45Z bayard $
*/
public class Main {
/**
* <p>Converts a String to a Boolean.</p>
*
* <p><code>'true'</code>, <code>'on'</code> or <code>'yes'</code>
* (case insensitive) will return <code>true</code>.
* <code>'false'</code>, <code>'off'</code> or <code>'no'</code>
* (case insensitive) will return <code>false</code>.
* Otherwise, <code>null</code> is returned.</p>
*
* <pre>
* BooleanUtils.toBooleanObject(null) = null
* BooleanUtils.toBooleanObject("true") = Boolean.TRUE
* BooleanUtils.toBooleanObject("false") = Boolean.FALSE
* BooleanUtils.toBooleanObject("on") = Boolean.TRUE
* BooleanUtils.toBooleanObject("ON") = Boolean.TRUE
* BooleanUtils.toBooleanObject("off") = Boolean.FALSE
* BooleanUtils.toBooleanObject("oFf") = Boolean.FALSE
* BooleanUtils.toBooleanObject("blue") = null
* </pre>
*
* @param str the String to check
* @return the Boolean value of the string,
* <code>null</code> if no match or <code>null</code> input
*/
public static Boolean toBooleanObject(String str) {
if ("true".equalsIgnoreCase(str)) {
return Boolean.TRUE;
} else if ("false".equalsIgnoreCase(str)) {
return Boolean.FALSE;
} else if ("on".equalsIgnoreCase(str)) {
return Boolean.TRUE;
} else if ("off".equalsIgnoreCase(str)) {
return Boolean.FALSE;
} else if ("yes".equalsIgnoreCase(str)) {
return Boolean.TRUE;
} else if ("no".equalsIgnoreCase(str)) {
return Boolean.FALSE;
}
// no match
return null;
}
}
]]>