Android String Case Convert camelString(String str, boolean firstCharacterUppercase)

Description

camel String

License

Apache License

Declaration

public static String camelString(String str,
        boolean firstCharacterUppercase) 

Method Source Code

//package com.java2s;
/**/*from  ww  w  .  j  ava  2 s . c  om*/
 * Copyright 2013 ??????
 *
 * 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 {
    public static final String EMPTY = "";
    public static final char[] WORD_SEPARATORS = { '_', '-', '@', '$', '#',
            ' ' };

    public static String camelString(String str,
            boolean firstCharacterUppercase) {
        if (str == null) {
            return null;
        }

        StringBuffer sb = new StringBuffer();

        boolean nextUpperCase = false;
        for (int i = 0; i < str.length(); i++) {
            char c = str.charAt(i);

            if (isWordSeparator(c)) {
                if (sb.length() > 0) {
                    nextUpperCase = true;
                }
            } else {
                if (nextUpperCase) {
                    sb.append(Character.toUpperCase(c));
                    nextUpperCase = false;
                } else {
                    sb.append(Character.toLowerCase(c));
                }
            }
        }

        if (firstCharacterUppercase) {
            sb.setCharAt(0, Character.toUpperCase(sb.charAt(0)));
        }
        return sb.toString();
    }

    public static boolean isWordSeparator(char c) {
        for (int i = 0; i < WORD_SEPARATORS.length; i++) {
            if (WORD_SEPARATORS[i] == c) {
                return true;
            }
        }
        return false;
    }

    public static boolean isWordSeparator(char c, char[] wordSeparators) {
        if (wordSeparators == null) {
            return false;
        }
        for (int i = 0; i < wordSeparators.length; i++) {
            if (wordSeparators[i] == c) {
                return true;
            }
        }
        return false;
    }

    public static String toUpperCase(String str) {
        if (str == null) {
            return null;
        }
        return str.toUpperCase();
    }

    public static String toUpperCase(String str, int beginIndex,
            int endIndex) {
        if (str == null) {
            return null;
        }
        StringBuilder sb = new StringBuilder();
        if (beginIndex < 0) {
            beginIndex = 0;
        }
        if (endIndex > str.length()) {
            endIndex = str.length();
        }
        if (beginIndex > 0) {
            sb.append(str.substring(0, beginIndex));
        }
        sb.append(str.substring(beginIndex, endIndex).toUpperCase());
        if (endIndex < str.length()) {
            sb.append(str.substring(endIndex));
        }
        return sb.toString();
    }

    public static String toLowerCase(String str) {
        if (str == null) {
            return null;
        }
        return str.toLowerCase();
    }

    public static String toLowerCase(String str, int beginIndex,
            int endIndex) {
        if (str == null) {
            return null;
        }
        StringBuilder sb = new StringBuilder();
        if (beginIndex < 0) {
            beginIndex = 0;
        }
        if (endIndex > str.length()) {
            endIndex = str.length();
        }
        if (beginIndex > 0) {
            sb.append(str.substring(0, beginIndex));
        }
        sb.append(str.substring(beginIndex, endIndex).toLowerCase());
        if (endIndex < str.length()) {
            sb.append(str.substring(endIndex));
        }
        return sb.toString();
    }

    public static String substring(String str, int beginIndex) {
        if (str == null) {
            return null;
        }

        if (beginIndex < 0) {
            return EMPTY;
        }

        if (beginIndex > str.length()) {
            return EMPTY;
        }

        return str.substring(beginIndex);
    }

    public static String substring(String str, int beginIndex, int endIndex) {
        if (str == null) {
            return null;
        }

        if (beginIndex < 0 || endIndex < 0) {
            return EMPTY;
        }

        if (endIndex > str.length()) {
            endIndex = str.length();
        }

        if (beginIndex > endIndex || beginIndex > str.length()) {
            return EMPTY;
        }

        return str.substring(beginIndex, endIndex);
    }
}

Related

1. upperCase(String str)
2. endsWithIgnoreCase(String source, String suffix)
3. endsWithIgnoreCase(final String target1, final String target2)
4. startsWithIgnoreCase(final String target1, final String target2)
5. toTitleCase(String s)
6. firstByteToLower(String instring)
7. capitalize(String plainMessage, char letter)
8. uncapitalize(String capitalizedMessage, char letter)
9. toUpper(char ch)