convert-to-lowercase()

Step 1: Understand the problem

The goal of the function convert-to-lowercase is to take an input string and convert all the characters in it to their lowercase version. In Java, we will use the method toLowerCase() which is a part of the String class in Java. This method converts all the characters in the given string to lower case.

String example = "Hello World";
String result = example.toLowerCase();
// Now, result has the value "hello world"

Step 2: Define the function

Start by defining the convert() function. This function will take a string as an input.

public static String convert(String input) {
}

Step 3: Use the toLowerCase() method inside the function

Inside the function use the toLowerCase() method with the input string.

public static String convert(String input) {
    return input.toLowerCase();
}

Step 4: Test the function

It's always good practice to test your functions. Call the function with some test strings to see if it outputs expected results.

public static void main(String[] args) {
    System.out.println(convert("Hello World"));  // prints: hello world
    System.out.println(convert("JAVA is fun!"));  // prints: java is fun!
}

Step 5: Conclusion

This is the final implementation of the convert function. It's a simple function that takes a string input and returns its lowercase version.

public class Main {
    public static String convert(String input) {
        return input.toLowerCase();
    }
    
    public static void main(String[] args) {
        System.out.println(convert("Hello World"));
        System.out.println(convert("JAVA is Fun!"));
    }
}

The code has been tested and is fully functional. It can convert any string to lowercase, which seems to meet the requirements.