Online Lower Case Converter

I include the following method in my code to help with lowercase letters, extra spaces etc... But I seem to get the same wrong message. Can you please explain what it mean? I've never seen it before so would really appreciate some help.

Thanks!

"Found characters that are probably not UTF-8 encodedthe following places:DogRegister.java:73: "" (Unicode: 2019)This test is not perfect. At the moment, it relies on a "whitelist" with all the characters directly visible on a common Swedish keyboard. If you use other characters, or some accent combinations, the test will fail even if the code is in UTF-8. Also note that some characters are available in several variants that can be difficult to distinguish from each other. If you find that the character / characters above look okay, google the unicode code so you can see what character it really is."

private String readCommand() {return input.nextLine().trim().toLowerCase();}private String readString(String message) {System.out.print(message);String input = readCommand();while (input.isEmpty()) {System.out.println("Error! the name can’t be empty");System.out.print(message);input = readCommand();}return input;

Is there a way to convert a string from uppercase, or even part uppercase to lowercase?

E.g. Kilometers --> kilometers.

Given hash with nested documents:

myHash = {  "MemberId"=>"ABC0001",   "MemberName"=>"Alan",   "details"=>[    {"LineNumber"=>"4.1", "Item"=>"A0001", "Description"=>"Apple"},     {"LineNumber"=>"5.1", "Item"=>"A0002"},     {"LineNumber"=>"6.1", "Item"=>"Orange"}  ]}

I want to change it so it will look like:

{  "memberid"=>"ABC0001",   "membername"=>"Alan",   "details"=>[    {"linenumber"=>"4.1", "item"=>"A0001", "description"=>"Apple"},     {"linenumber"=>"5.1", "item"=>"A0002"},     {"linenumber"=>"6.1", "item"=>"Orange"}  ]}

In other words, I want to change to lower case if any in the hash key.I understand I'll have to iterate through the hash and use downcase method. If there any easy way of doing this in ruby?

I need to make a function that reads a string input and converts the odd indexed characters in the string to upperCase and the even ones to lowerCase.

function alternativeCase(string){    for(var i = 0; i < string.length; i++){        if (i % 2 != 0) {            string[i].toUpperCase();        }        else {            string[i].toLowerCase();        }       }    return string;}

How to fix my code?

(1)I have about 200 directories, with probably a 1000 sub-directories containing 10,000 of files.

I would like to keep the names intact, but change them all to lower case, including Unicode characters such as 'É' (to 'é').

Can you advise how it could be done through PowerShell? It is my own computer and I have admin rights.