Java String Underscore toUnderScoreCase(String s)

Description

to Under Score Case

License

Apache License

Declaration

public static String toUnderScoreCase(String s) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

public class Main {
    private static final char SEPARATOR = '_';

    public static String toUnderScoreCase(String s) {
        if (s == null) {
            return null;
        }/*from w w w. j a v  a 2  s .c  o  m*/

        StringBuilder sb = new StringBuilder();
        boolean upperCase = false;
        for (int i = 0; i < s.length(); i++) {
            char c = s.charAt(i);

            boolean nextUpperCase = true;

            if (i < (s.length() - 1)) {
                nextUpperCase = Character.isUpperCase(s.charAt(i + 1));
            }

            if ((i > 0) && Character.isUpperCase(c)) {
                if (!upperCase || !nextUpperCase) {
                    sb.append(SEPARATOR);
                }
                upperCase = true;
            } else {
                upperCase = false;
            }

            sb.append(Character.toLowerCase(c));
        }

        return sb.toString();
    }
}

Related

1. toUnderscore(String s)
2. toUnderscore(String text)
3. toUnderscore(String v)
4. toUnderscoreCase(final String s)
5. toUnderscoreCase(String name)
6. toUnderScoreCase(String s)
7. toUnderscored(String name)
8. toUnderscoredLowercase(String text)
9. toUnderscoreName(String name)