Review the following code examples and improve them (You should keep and improve the multithreading parts). Once the code files have been fixed, make them flexible in such a way that the words are provided by a user. In other words, the program asks a user to enter three sets of words which are used to list the words.

public class Called {

void call(String msg) {

System.out.print(" [" + msg);

try {

Thread.sleep(1000);

} catch(InterruptedException e) {

System.out.println("Interrupted");

}

System.out.println("]");

}

}

public class Caller implements Runnable {

String msg;

Called target;

Thread trd;

public Caller(Called tgt, String s) {

target = tgt;

msg = s;

trd = new Thread(this);

}

public void run() {

target.call(msg);

}

}

public class TestSynchronization {

public static void main(String[] args) {

Called target = new Called();

Caller caller01 = new Caller(target, "CIS 314");

Caller caller02 = new Caller(target, "Advanced Programming");

Caller caller03 = new Caller(target, "Java");

caller01.trd.start();

caller02.trd.start();

caller03.trd.start();

try {

caller01.trd.join();

caller02.trd.join();

caller03.trd.join();

} catch(InterruptedException e) {

System.out.println("Interrupted");

}

}

}

The output is supposed to be the following:

[CIS 314]

[Advanced Programming]

[Java]