/*
* 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.
*/
public class Main {
/**
* Checks if the String contains only whitespace.
*
* null will return false.
* An empty String ("") will return true.
*
*
* StringUtils.isWhitespace(null) = false
* StringUtils.isWhitespace("") = true
* StringUtils.isWhitespace(" ") = true
* StringUtils.isWhitespace("abc") = false
* StringUtils.isWhitespace("ab2c") = false
* StringUtils.isWhitespace("ab-c") = false
*
*
* @param str the String to check, may be null
* @return true if only contains whitespace, and is non-null
* @since 2.0
*/
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;
}
}