Mega Code Archive
Checks whether the String contains only digit characters
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import java.math.BigDecimal;
import java.math.BigInteger;
/**
* 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.
*/
/**
* Provides extra functionality for Java Number classes.
*
* @author <a href="mailto:rand_mcneely@yahoo.com">Rand McNeely</a>
* @author Stephen Colebourne
* @author <a href="mailto:steve.downey@netfolio.com">Steve Downey</a>
* @author Eric Pugh
* @author Phil Steitz
* @since 1.0
* @version $Id: NumberUtils.java 488819 2006-12-19 21:50:04Z bayard $
*
*/
public class Main {
//--------------------------------------------------------------------
/**
* Checks whether the <code>String</code> contains only
* digit characters.
*
* <code>Null</code> and empty String will return
* <code>false</code>.
*
* @param str the <code>String</code> to check
* @return <code>true</code> if str contains only unicode numeric
*/
public static boolean isDigits(String str) {
if ((str == null) || (str.length() == 0)) {
return false;
}
for (int i = 0; i < str.length(); i++) {
if (!Character.isDigit(str.charAt(i))) {
return false;
}
}
return true;
}
}
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