Java - user interface and termination

For a project I need two wirte a java program with a user interface. Not GUI. Only a user interface asking the user to enter a command. The user should also be able to terminate the program. Do someone maybe have a link to a website that might help - I'm not sure in which direction开发者_运维问答 to look...

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It's not a tutorial but here's a basic example of what you describe to get you started. My app here takes two commands 'hello' which prints a greeting, and 'quit' which exits the program. Any other input will display 'unknown command'.

    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStreamReader;

    public class Main {
        public static void main(String[] args) throws IOException {
            BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
            String command;
            do {
                command = reader.readLine();
                if (command.equals("hello")) {
                    System.out.println("Hello there!");
                } else if (command.equals("quit")) {
                    return; // exit program
                } else {
                    System.out.println("Unknown command.");
                }
            } while (true);

        }
    }

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Java IO Tutorial

Basic input and output is all you need.

Specifically, I/O from the Command Line

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A console program? You can read user input using Console.readLine(). The Console class has a very detailed javadoc.