Thread Life Cycle in Java tells the various information of thread form born to terminate. Thread life cycle contains the several stages and at a time any thread can be present in a single state. States of Thread life cycle Born Ready Running Blocked Sleep Wait Dead Ready: In this state thread is ready to … Read more
1 What is a Thread in Java A thread is light weight process that can execute simultaneously. Multithreading in java allows multiple threads to run simultaneously. A program can be divided into two or more parts that can run concurrently and each part of such program is known as thread. In a simple word, thread … Read more
There are two ways to determine whether a thread has finished or not. isAlive() join() isAlive(): isAlive() method is used to check whether a thread is in the running or not . or In a another word, this method determines thread is live or dead. isAlive( )method returns true if the thread … Read more
suspend() : This method suspend a thread for sometime but do not kill/terminate it. resume() : This method revives the suspended thread.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | class A extends Thread { public void run() { for (int i = 1; i <= 5; i++) { System.out.println("A" + i); } System.out.println("Exit from A"); } } class B extends Thread { public void run() { for (int i = 1; i <= 5; i++) { System.out.println("B" + i); } System.out.println("Exit from B"); } } public class TestMain { public static void main(String args[]) { A a = new A(); B b = new B(); a.start(); b.start(); a.suspend(); a.resume(); } } |
1 2 3 4 5 6 7 8 9 10 11 12 | A1 A2 A3 A4 A5 Exit from A B1 B2 B3 B4 B5 Exit from B |
In java, stop() method kills/terminates the currently executing thread.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | class A extends Thread { public void run() { for (int i = 1; i <= 5; i++) { if (i == 3) stop(); System.out.println("A" + i); } System.out.println("Exit from A"); } } public class TestMain { public static void main(String args[]) { A a = new A(); a.start(); } } |
Result
1 2 | A1 A2 |
Description: in the above program, when value of variable i=3 then stop() method terminates the curently executing thread and come out of the loop.
In java, yield() method temporarily pause the currently executing thread object and allow other threads to execute.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | class A extends Thread { public void run() { for (int i = 1; i <= 5; i++) { if (i == 2) yield(); System.out.println("A" + i); } System.out.println("Exit from A"); } } class B extends Thread { public void run() { for (int i = 1; i <= 5; i++) { System.out.println("B" + i); } System.out.println("Exit from B"); } } public class xyz { public static void main(String args[]) { A a = new A(); B b = new B(); a.start(); b.start(); } } |
1 2 3 4 5 6 7 8 9 10 11 12 | A1 A2 A3 A4 A5 Exit from A B1 B2 B3 B4 B5 Exit from B |
In computing, producer–consumer problem also known as the bounded-buffer problem. In the producer–consumer problem there are two processes, first is producer and the second is consumer, who share a common, fixed-size buffer. The producer’s job is to generate data, put it into the buffer and start again. At the same time, the consumer’s job is … Read more
When two or more threads try to access the same resource, they need somehow to ensure that the resource will be used by only one thread at a time. The process by which this achive is called Synchronization. Java uses the concept of monitor (also called semaphore) for Synchronization. The monitor allows one thread at … Read more
In java, when two or more than two thread is computing for CPU time, every thread is assigned a priority value. A highest Priority thread get preference over lower priority thread. All Java threads have a priority in the range 1-10. Top priority is 10, lowest priority is 1.Normal priority ie. priority by default … Read more
In Java programming, when a program begins the first thread that starts running is called main thread. Other threads(child thread) can be spawned from this main thread. When program terminates, the main thread must be the last thread in the program to end. When the main thread stops, the program stops running. Main thread is … Read more