import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

public class KeyinTest {

    public static void main(String[] args) throws IOException {

        var reader = new InputStreamReader(System.in);

        var br = new BufferedReader(reader);

        {

            String line = null;

            while ((line = br.readLine()) != null){

                if (line.equals("exit")){

                    System.exit();

                }

                System.out.println("readline content:" + line);

            }

        }

    }

}

adddd

readline content:adddd

dasdf

readline content:dasdf

exit