Java

public class fin {

	public void finalize()
	{
		System.out.println("finalize called");
	}
	
	public static void main(String[] args) {
		
		fin f1=new fin();
		fin f2=new fin();
		
		f1=null;
		f2=null;
		System.gc();
	}

}

t1.setDaemon(true);

Not a Daemon Thread

t1.setDaemon(true);

public class Thr1 extends Thread{

	public void run()
	{
		if(Thread.currentThread().isDaemon())
		{
			System.out.println("Daemon Thread");
		}
		else
		{
			System.out.println("Not a Daemon Thread");
		}
	}
	
	public static void main(String[] args) {
		Thr1 t1=new Thr1();
		t1.setDaemon(true);
		t1.start();
	}

}

package collection;

public class Pri extends Thread{

	public void run()
	{
		System.out.println(Thread.currentThread().getName()+" "+Thread.currentThread().getPriority());
	}
	
	
	public static void main(String[] args) {
		Pri p1=new Pri();
		Pri p2=new Pri();
		Pri p3=new Pri();
		
		p1.setPriority(2);
		p2.setPriority(4);
		p3.setPriority(6);
		
		p1.start();
		p2.start();
		p3.start();
		
		
		

	}

}

Thread-0 2
Thread-1 4
Thread-2 6

Thread-2 6 Thread-1 4 Thread-0 2

private Peg currentPeg;
private Peg[][] cells = new Peg[SIZE][SIZE];

public Peg checkRowMatch() {
    for (int i = 0; i < SIZE; i++) {
        if(cells[i][0]== cells[i][1] && cells[i][1] == cells[i][2] && cells[i][0] != Peg.NONE){
            return cells[i][0];
        }
    }
    return Peg.NONE;
}

public Peg checkColumnMatch() {
    for (int j = 0; j < SIZE; j++) {
        if(cells[0][j]== cells[1][j] && cells[1][j] == cells[2][j] && cells[0][j] != Peg.NONE){
            return cells[0][j];
        }
    }
    return Peg.NONE;
}

public enum Peg {NONE, FIRST, SECOND};