Reading System.in from the Console using Intellij and JUnit

Question

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 ?

Answer 1

您需要使用-Deditable.java.test.console=true启动IDE（例如，通过“帮助”>“编辑自定义VM选项...”），请参见此注释 。

Answer 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.