frame_1_3_7.java

public class Documents {

	public static void main(String[] args) {
   
		
		// we must calculate how many D:H:M:S from 1 January 1970 to today
		
				long time = System.currentTimeMillis()/1000;
				
				int day = (int) time / (60 * 60 * 24);
				time = time % (60 * 60 * 24);
				
				int hour = (int) time / (60 * 60);
				time = time % (60 * 60);
				
				int min = (int) time / 60;
				time = time % 60;
				
				int sec = (int) time;
				
				System.out.print(day + ":" + hour + ":"+ min + ":" + sec);
						
		
		
		
		
	}
}