Java String Lower Case toLowerCase(String input)

Description

returns the lower case string, is null save {Category} StringUtil {param} string(input) input: String.

License

Apache License

Declaration

public static String toLowerCase(String input) 

Method Source Code

//package com.java2s;
/**//from   w  w w.  jav  a  2  s. c o m
 * Copyright 2015 Jan Lolling jan.lolling@gmail.com
 * 
 * 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 {
    /**
     * returns the lower case string, is null save
     * 
     * {Category} StringUtil
     * 
     * {param} string(input) input: String.
     * 
     * {example} toLowerCase("AbC") # "abc"
     */
    public static String toLowerCase(String input) {
        String s = getNullSaveStr(input);
        return s.toLowerCase();
    }

    /**
     * Returns a empty not null String if input is null or equals "null",
     * otherwise returns input
     * 
     * {Category} StringUtil
     * 
     * {param} string(input) input: String.
     * 
     * {example} getNullSaveStr(null) # ""
     */
    public static String getNullSaveStr(String input) {
        if (input == null) {
            return "";
        } else if ("null".equalsIgnoreCase(input)) {
            return "";
        } else {
            return input;
        }
    }
}

Related

1. toLowerCase(final String[] strings)
2. toLowerCase(final StringBuilder src)
3. toLowercase(int codePoint)
4. toLowerCase(int u)
5. toLowerCase(String candidate)
6. toLowerCase(String input)
7. toLowerCase(String name)
8. toLowerCase(String pString)
9. toLowerCase(String s)