Подскажите, пожалуйста, в чём дело?
package com.javarush.task.task16.task1629;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Solution {
public static volatile BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
public static void main(String[] args) throws InterruptedException {
Read3Strings t1 = new Read3Strings();
Read3Strings t2 = new Read3Strings();
t1.start();
t1.join();
t2.start();
t2.join();
}
public static class Read3Strings extends Thread {
@Override
public void run() {
try {
String line1 = reader.readLine();
String line2 = reader.readLine();
String line3 = reader.readLine();
printResult(line1,line2, line3);
} catch (IOException e) {
e.printStackTrace();
}
}
public static void printResult(String line1, String line2, String line3) {
String out1 = line1 + " " + line2 + " " + line3;
System.out.println(out1);
}
}
}