Cannot pass last task

Question about the task

Resolved

I'm lost. My output display a, b, c new line a, b, c, d, e, f I played around with the join methods but still don't understand what i'm doing. Your help is appreciated.

1. In the Solution class, create a public static Read3Strings class that inherits Thread.
2. In the run method, read three lines from the console.
3. Three lines should be read in succession on one thread and combined into one space-delimited string.
4. In the main method, display the result for each thread.
5. Use join.

Example:

Input:
a b c d e f

Output:
a b c d e f

Requirements:

In the Solution class, declare the public static Read3Strings class.
The Read3Strings class should inherit the Thread class.
The Read3Strings class's run method must read three lines.
The Read3Strings class must have a public printResult method.
The printResult method should display the 3 read lines, separating them with spaces.
The main method should call the created threads' start methods.
The main method should call the created threads' join methods.
The program's output should indicate that the threads read the lines sequentially, not in parallel.

package com.codegym.task.task16.task1629; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.*; 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(); //write your code here //write your code here t1.start(); t1.join(); t2.start(); t1.printResult(); t2.join(); t2.printResult(); } //write your code here public static class Read3Strings extends Thread { static ArrayList<String> list = new ArrayList<>(); @Override public void run() { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); for (int i = 0; i<3; i++){ try { list.add(reader.readLine()); list.add(" "); } catch (IOException e) { e.printStackTrace(); } } } public void printResult(){ for (int i =0; i<list.size()-1; i++){ System.out.print(list.get(i)); } System.out.println(); } } }

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dhanush

Level 30 , Chennai, India

30 September 2020, 10:01

#1 At first you are not using the class level bufferedreader you're using local bufferedreader it codegym server won't accept and don't verify it so use Solution class reader. #2 The line 33 if you make it as static means it refers to class not object so it display everything which is in the class ,for eg: if i entered a String a b c d e f output will be abcdef abcdef There will be no sequntial output that's why the last condition is not satisfying. #3 look at the line 24 it's not proper it just break the streak of character and print at the middl, Move the line 24 after the line 26. #4 use for-each loop to display it will be helpful.