Instructions.md

1. Create a new Implementation of Logger that makes all message uppercase and replace the existing one.
2. Create a new Implementation of Logger that inherits from the uppercase version. Add new functionality
3. Create a new LogHandler that inherits from LogHandler. This should allow for the Logger to be changed after the constructor is used
4. Create a new LogHandler that can accept multiple Loggers and uses all of them to display messages

Logger.java

public interface Logger {

    void log(String message);

}

LogHandler.java

public class LogHandler {
    private Logger logger;

    public LogHandler(Logger logger) {
        this.logger = logger;
    }

    void handleLog(String message) {
        logger.log(message);
    }

}

Main.java

public class Main {
    public static void main(String[] args) {

        Logger logger = new PlainLogger();
        LogHandler logHandler = new LogHandler(logger);

        logHandler.handleLog("hello world");
    }
}