Object Oriented Programming using Java Laboratory (DJS23FLES201) Academic
Year 2024-25
Name- Mohammad Ahmed Shaikh
Sap id – 60003240302
Roll no-I169
13. To implement Multithreading (CO1, CO2)
a. Write a multithreaded program a java program to print Table of Five, Seven and Thirteen
using Multithreading (Use Thread class for the implementation).
Code: class EXP13a extends
Thread {
private int number; public
EXP13a(int number) { this.number
= number;
}
public void run() {
System.out.println("Table of " + number + ":");
for (int i = 1; i <= 10; i++) {
System.out.println(number + " x " + i + " = " + (number * i));
}
System.out.println();
}
public static void main(String[] args) {
EXP13a t5 = new EXP13a(5);
EXP13a t7 = new EXP13a(7); EXP13a
t13 = new EXP13a(13);
t5.start(); t7.start(); t13.start();
}
}
Object Oriented Programming using Java Laboratory (DJS23FLES201) Academic Year
2024-25
Output:
b. Write a multithreaded program to display /*/*/*/*/*/*/*/* using 2 child threads.
Object Oriented Programming using Java Laboratory (DJS23FLES201) Academic Year
2024-25
Code: class EXP13b extends
Thread {
public void run() { for (int i
= 0; i < 4; i++) {
System.out.print("/*");
}
}
public static void main(String[] args) {
EXP13b t1 = new EXP13b();
EXP13b t2 = new EXP13b();
t1.start();
t2.start();
}
}
Output:
c. Write a multithreaded program that generates the Fibonacci sequence. This program should
work as follows: create a class Input that reads the number of Fibonacci numbers that the
program is to generate. The class will then create a separate thread that will generate the
Fibonacci numbers, placing the sequence in an array. When the thread finishes execution,
the parent thread (Input class) will output the sequence generated by the child thread.
Because the parent thread cannot begin outputting the Fibonacci sequence until the child
thread finishes, the parent thread will have to wait for the child thread to finish.
Code: class EXP13c { public static void main(String[] args)
throws InterruptedException { int count = 10;
Object Oriented Programming using Java Laboratory (DJS23FLES201) Academic Year
2024-25
FibonacciGenerator thread = new FibonacciGenerator(count); thread.start();
thread.join();
int[] result = thread.getSequence();
System.out.print("Fibonacci Sequence: ");
for (int num : result) {
System.out.print(num + " ");
}
System.out.println();
}
}
Output:
d. WAP to prevent concurrent booking of a ticket using the concept of thread synchronization.
Code: class TicketSystem
{ int
availableTickets = 3;
synchronized void bookTicket(String name) {
if (availableTickets > 0) {
System.out.println(name + " successfully booked a ticket."); availableTickets--
;
} else {
System.out.println(name + " failed to book. No tickets left.");
}
}
}
Object Oriented Programming using Java Laboratory (DJS23FLES201) Academic Year
2024-25
class BookingThread extends Thread {
TicketSystem system;
String name;
BookingThread(TicketSystem system, String name) {
this.system = system; this.name = name;
public void run() {
system.bookTicket(name);
}
}
class EXP13d { public static void
main(String[] args) { TicketSystem
system = new TicketSystem();
BookingThread t1 = new BookingThread(system, "Alice");
BookingThread t2 = new BookingThread(system, "Bob");
BookingThread t3 = new BookingThread(system, "Cynthia"); BookingThread
t4 = new BookingThread(system, "Daniel");
t1.start(); t2.start(); t3.start(); t4.start();
}
}
Object Oriented Programming using Java Laboratory (DJS23FLES201) Academic Year
2024-25
Output:
e. Write a program to demonstrate thread methods: wait notify suspend resume join setpriority
getpriority setname getname Code: class
EXP13e extends Thread {
public void run() { try {
System.out.println("Running
thread: " + getName());
Thread.sleep(500);
} catch (InterruptedException e) {
System.out.println("Thread interrupted.");
}
}
public static void main(String[] args) throws InterruptedException { EXP13e
thread = new EXP13e(); thread.setName("DemoThread");
System.out.println("Thread name set to: " + thread.getName());
thread.setPriority(Thread.MAX_PRIORITY);
Object Oriented Programming using Java Laboratory (DJS23FLES201)
Academic Year 2024-25
System.out.println("Thread priority set to: " + thread.getPriority());
thread.start(); thread.join();
}
}
Output:
