Java String Starts Wtih startsWithIgnoreCase(String str, String prefix)

Description

Test if the given String starts with the specified prefix, ignoring upper/lower case.

License

Apache License

Parameter

Parameter	Description
str	the String to check
prefix	the prefix to look for

Declaration

public static boolean startsWithIgnoreCase(String str, String prefix) 

Method Source Code

//package com.java2s;
/*/*www.j a  v  a2 s  .  c o  m*/
 * Copyright 2002-2012 the original author or authors.
 *
 * 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 {
    /**
     * Test if the given String starts with the specified prefix,
     * ignoring upper/lower case.
     *
     * @param str    the String to check
     * @param prefix the prefix to look for
     * @see String#startsWith
     */
    public static boolean startsWithIgnoreCase(String str, String prefix) {
        if (str == null || prefix == null) {
            return false;
        }
        if (str.startsWith(prefix)) {
            return true;
        }
        if (str.length() < prefix.length()) {
            return false;
        }
        String lcStr = str.substring(0, prefix.length()).toLowerCase();
        String lcPrefix = prefix.toLowerCase();
        return lcStr.equals(lcPrefix);
    }

    public static boolean equals(String str1, String str2) {
        return str1 == null ? str2 == null : str1.equals(str2);
    }
}

Related

1. startsWithIgnoreCase(String startString, String anotherString)
2. startsWithIgnoreCase(String str, String prefix)
3. startsWithIgnoreCase(String str, String prefix)
4. startsWithIgnoreCase(String str, String prefix)
5. startsWithIgnoreCase(String str, String prefix)
6. startsWithIgnoreCase(String str, String prefix)
7. startsWithIgnoreCase(String str, String start)
8. startsWithIgnoreCase(String str1, String str2)
9. startsWithIgnoreCase(String string1, String string2)