Multi-threading is a java process of executing two or more threads (programs) simultaneously to utilize the processor maximum. Multi-tasking: Single Threaded application: class Code{ public static void main(String args[]) { int x=10/0; }} Exception in thread “main” java.lang.ArithmeticException: / by zero
Define Custom thread in java: Note: Thread Life Cycle: Every thread has undergone different states in its Life.
start(): Program to define 2 Custom thread and start from main thread: class Default{ public static void main(String[] args) { First f = new First(); Second s = new Second(); f.start(); s.start(); }}class First extends Thread{ public void run() { for (int i=1 ; i<=100 ; i++) { System.out.println(“First : ” + i); } }}class …
sleep(): class Default{ public static void main(String[] args) { First f = new First(); Second s = new Second(); f.start(); s.start(); }}class First extends Thread{ public void run() { for (int i=1 ; i<=10 ; i++) { System.out.println(“First : ” + i); try{ Thread.sleep(1000); }catch(Exception e){ } } }}class Second extends Thread{ public void run() …
join(): For Example, Consider First thread is calculating sum of first N numbers and second thread has to display the result. The Second thread has to wait until First thread completes calculation. import java.util.Scanner;class Main{ static int n; public static void main(String[] args) { System.out.println(“***Sum of First N numbers***”); Scanner sc = new Scanner(System.in); System.out.print(“Enter …
Thread Synchronization: Program: Consider a method increase the value of x by 1 and when multiple threads are trying to invoke the method concurrently, we get odd results. Hence we need to synchronize the value() method. class Modify{ static int x; synchronized static void value() { x=x+1; }}class First extends Thread{ public void run() { …
wait(), notify() and notifyAll(): Syntax of Calling: wait() notify() notifyAll() synchronized( lockObject ){ while(!condition ) { lockObject.wait(); } //take the action here;} synchronized(lockObject){ //establish_the_condition; lockObject.notify(); //any additional code} synchronized(lockObject){ establish_the_condition; lockObject.notifyAll();}