Java String Starts Wtih startsWithName(String subject, String beginName)

Description

starts With Name

License

Apache License

Parameter

Parameter	Description
subject	A string.
beginName	A name.

Exception

Parameter	Description
NullPointerException	if subject or beginName is null.

Return

True if subject starts with the specified name, i.e. always name is empty, else if name equals it, or starts with it followed by '.' or '$'.

Declaration

public static boolean startsWithName(String subject, String beginName) 

Method Source Code

//package com.java2s;
/*/*from  w  ww.j  av  a2  s  .  co  m*/
 * Copyright 2015-2016 Jeff Hain
 *
 * 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.
 */

public class Main {
    private static final char CHAR_DOT = '.';
    private static final char CHAR_DOLLAR = '$';

    /**
     * @param subject A string.
     * @param beginName A name.
     * @return True if subject starts with the specified name,
     *         i.e. always name is empty, else if name equals it,
     *         or starts with it followed by '.' or '$'.
     * @throws NullPointerException if subject or beginName is null.
     */
    public static boolean startsWithName(String subject, String beginName) {
        // Implicit null checks.
        if (!subject.startsWith(beginName)) {
            return false;
        }
        if (beginName.length() == 0) {
            // Anything matches.
            return true;
        }
        if (subject.length() == beginName.length()) {
            // Equals.
            return true;
        }
        final char afterBeginNameChar = subject.charAt(beginName.length());
        return (afterBeginNameChar == CHAR_DOT) || (afterBeginNameChar == CHAR_DOLLAR);
    }
}

Related

1. startsWithLetterOrUnderscore(String value)
2. startsWithLinuxRoot(String path)
3. startsWithLowerCase(String text)
4. startsWithLowerCaseChar(String s)
5. startsWithMultiple(String string, String... starts)
6. startsWithNoCase(String csValue, String csStart)
7. startsWithOne(final String src, final String[] dest)
8. startsWithOneOf(String source, boolean ignoreCase, String... values)
9. startsWithOneOf(String str, String... strs)