Java String Case Insert invertCase(String str)

Description

invert Case

License

Open Source License

Declaration

public static String invertCase(String str) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

public class Main {
    public static String invertCase(String str) {
        int strLen;
        if (str == null || (strLen = str.length()) == 0) {
            return str;
        }//w w  w.  jav a 2  s  .  c om
        StringBuilder builder = new StringBuilder(strLen);

        char ch = 0;
        for (int i = 0; i < strLen; i++) {
            ch = str.charAt(i);
            if (Character.isUpperCase(ch)) {
                ch = Character.toLowerCase(ch);
            } else if (Character.isTitleCase(ch)) {
                ch = Character.toLowerCase(ch);
            } else if (Character.isLowerCase(ch)) {
                ch = Character.toUpperCase(ch);
            }
            builder.append(ch);
        }
        return builder.toString();
    }
}

Related

1. invert(final String s)
2. invert(String s)
3. invertCase(String line)
4. invertDate(String sDate)
5. inverter(String str)
6. inverter(String string)
7. inverterString(String palavra)