Sample15.java

import java.util.ArrayList;
import java.util.Scanner;

public class Sample15 extends Thread

 {
 ArrayList<Integer> al=new ArrayList<Integer>();
 public void add(Integer x)
 {
 
 al.add(x);
 System.out.println(al);
 }
 public void remove( Integer x)
 {
 if(al.contains(x))
 {
 al.remove(x);

 }
 System.out.println(al);
 }
 public void run()
 {
 this.add(100);
 this.remove(100);
 }
 public static void main(String[] args) throws InterruptedException {// thread is a light weight component which perform unit of work
 // because different objects of thread class contains same memory allocation.
 Sample15 obj=new Sample15();
 Sample15 obj2=new Sample15();
 Sample15 obj3=new Sample15();
 // System.out.println(obj.getName());
 // System.out.println(obj.getId());
 // System.out.println(obj.getPriority());
 // obj.setName("New_Thread");
 // System.out.println(obj.getName());
 // System.out.println(obj.isAlive());
 // System.out.println(obj.getName());
 
 obj.start();
 obj.setName("t1");
 
 obj.join();
 obj2.start();
 obj2.setName("t2");
 obj3.setName("t3");
 obj3.start();
 
 }
 
}