Determines if the specified string contains only Unicode letters or digits as defined by Character#isLetterOrDigit(char)
/*
* Copyright 2005 Joe Walker
*
* Licensed 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.
*/
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
/**
* @author Joe Walker [joe at getahead dot ltd dot uk]
*/
public class Main {
/**
* Determines if the specified string contains only Unicode letters or
* digits as defined by {@link Character#isLetterOrDigit(char)}
* @param test The string to test
* @return true if the string is non-null, non-empty and contains only
* characters that are unicode letters or digits
* @see Character#isLetterOrDigit(char)
*/
public static boolean isLetterOrDigitOrUnderline(String test)
{
if (test == null || test.length() == 0)
{
return false;
}
for (int i = 0; i < test.length(); i++)
{
if (!Character.isLetterOrDigit(test.charAt(i)) && test.charAt(i) != '_')
{
return false;
}
}
return true;
}
}
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