The readLine method uses System.out.print (not println) to print its string argument on the screen (later when we use the readLine method, the string argument of the method will be a message telling the user to type some text). Then the readLine method uses the input scanner object to read a whole line of text from the user of the program and returns the text as result.java代码

Sure, here is an example of how to implement the readLine method in the CLI class:

private static String readLine(String message) {
    System.out.print(message + " ");
    return input.nextLine();
}

This method takes a string argument called "message", which is the message that will be displayed to the user asking them to type some text. It then uses System.out.print to display the message on the screen without adding a newline character. Finally, it returns the text entered by the user using the input scanner object's nextLine() method.

You can then call this method in your program like this:

String name = readLine("Please enter your name:");
System.out.println("Hello, " + name + "!");

This will display the message "Please enter your name:" on the screen, wait for the user to enter some text, and then store the entered text in the "name" variable. The program will then display the message "Hello, [name]!" where [name] is the value entered by the user.