Java String Starts Wtih startsWithLetterOrUnderscore(String value)

Description

starts With Letter Or Underscore

License

Open Source License

Declaration

public static boolean startsWithLetterOrUnderscore(String value) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2011-2015 Red Hat, Inc.
 * Distributed under license by Red Hat, Inc. All rights reserved.
 * This program is made available under the terms of the
 * Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:/*from  w w  w.j a v a  2  s . c om*/
 *     Red Hat, Inc. - initial API and implementation
 ******************************************************************************/

public class Main {
    public static boolean startsWithLetterOrUnderscore(String value) {
        if (isEmpty(value)) {
            return false;
        }
        char character = value.charAt(0);
        return character == '_' || Character.isLetter(character);
    }

    /** 
     * Returns true if value is null or empty string.
     * @param value
     * @return
     */
    public static boolean isEmpty(String value) {
        return value == null || value.length() == 0;
    }

    public static boolean isEmpty(Object value) {
        return (value instanceof String) && isEmpty((String) value);
    }
}

Related

1. startsWithIgnoreWhitespace(String str, String prefix)
2. startsWithIgnoreWhitespaces(String prefix, String string)
3. startsWithIndex(String[] prefixes, String fullPath)
4. startsWithLenient(final String s, final String[] matches, final int[] minChars, final boolean acceptTrailing)
5. startsWithLetter(String str)
6. startsWithLinuxRoot(String path)
7. startsWithLowerCase(String text)
8. startsWithLowerCaseChar(String s)
9. startsWithMultiple(String string, String... starts)