Question

I am trying this program in java but I am not getting any output when I put everything in the run() method

Main.java:

public class Main {

    static int line;
    static boolean ret = true;
    static BufferedReader br;

    /**
     * @param args
     * @throws IOException 
     */
    public static void main(String[] args) throws IOException {

            File f = new File("tere.dat");
            // boolean ret = f.createNewFile() ;
            br = new BufferedReader(new FileReader(f));

            new Test(br.readLine());
            new Test(br.readLine());
    }

}    

Test.java:

public class Test extends Thread {

    private String input;
    static int thread_count = 0;

    public Test(String l)
    {
         input = l;
    }

    public void run()
    {
        System.out.println("Checking from other class  : This was printed from file :>>");
        System.out.println(input);
        String upper = input.toUpperCase();
        System.out.println("");
        System.out.println("The String in all UpperCase :" + upper);
    }
}

What I want to do is that I want to read lines from a file using two threads and then display whatever I get . I am new to Java

EDIT :

I was not using the start() method. Though even after using start() It reads only 2 lines from the file and stops. What could be the problem
?

Answer 1

You have to start() your Threads.

Also, i would suggest reading a good tutorial on Threads and concurrency in Java before proceeding, as it’s a complex subject.