Reading System.in from the Console using Intellij

问题:

The following code works nicely when running the code through a main in Idea

System.in.read()

However the same code inside a junit method is not working

public void testConsoleRead()
{
  System.in.read();
}

Any idea how to make this work, or something similar ?

回答1:

You need to start the IDE with -Deditable.java.test.console=true (e.g. via "Help" > "Edit Custom VM Options..."), see this comment.

回答2:

You need to use the Scanner class.

First import it:

import java.util.Scanner

Now to use it:

Scanner scanner = new Scanner(System.in);
String text = scanner.next();
scanner.close();

There are more methods like scanner.nextLine(); that you should look at.

Also you might need to handle some Exceptions here but that's not difficult to figure out.