Thread: Help with time

I am trying to make something like an alarm and it goes like this

    while(run){
        System.out.println(temp.getTime());
        if(temp.getTime()=="11:52"){
	    run = false;
	    JFrame frame = new JFrame("Alarm");
	    frame.add(new Screen());
	    frame.setSize(1280, 755);
	    frame.setLocationRelativeTo(null);
	    frame.setVisible(true);
	    frame.setAlwaysOnTop(true);
	    frame.setResizable(false);
	    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
    }

So when it is 11:52, it doesn't show up.
And when its 11:52, the console is still showing 11:51 however when i run it with only System.out.println(temp.getTime); again and again it changes. What can i do?

The output is 11:51 some hundred thousand times and when time changes on computer to 11:52, its still 11:51.
It has to go like 11:51 thousand times and when time changes on computer to 11:52, it should print 11:52 one time and show the window.
Here is the getTime() method

public String getTime(){
    return getHoursMinutes();
} 
// and here is getHoursMinutes()
            private String getHoursMinutes(){
		String time;
		if((date.getHours()-3)<12&&(date.getHours()-3)>0){
			if((date.getMinutes()+30)<60){
				time = (date.getHours()-3)+":"+(date.getMinutes()+30);
				return time;
			}else{
				time = (date.getHours()-2)+":"+((date.getMinutes()+30)-60);
				return time;
			}
		}else{
			if((date.getMinutes()+30)<60){
				time = (date.getHours()-3)-12+":"+(date.getMinutes()+30);
				return time;
			}else{
				time = (date.getHours()-2)-12+":"+((date.getMinutes()+30)-60);
				return time;
			}
		}
	}

i got the problem a while ago but cause of that while loop i had the pc crash with like 104486528745647560 windows but i got it now