java答辩代码_求大神帮忙注释一下以下Java代码，到时候答辩老师要问的

publicclassClock{publicstaticvoidmain(Stringargs[]){ClockViewcv=newClockView();cv.setVisible(true);try{for(;;){cv.refreshTimeDisplay();Thread.sleep(500);}}catch(Exception...

public class Clock {

public static void main(String args[]) {

ClockView cv = new ClockView();

cv.setVisible(true);

try {

for(;;) {

cv.refreshTimeDisplay();

Thread.sleep(500);

}

}catch (Exception e)

{System.out.println("Error:"+e);}

}

}

class ClockView extends javax.swing.JFrame {

/**

*

*/

private static final long serialVersionUID = 1L;

private javax.swing.JLabel tLabel = new javax.swing.JLabel();

ClockView()

{this.setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

this.setSize(95,45);

this.getContentPane().add(tLabel);

this.refreshTimeDisplay();

}

protected String getDigitsAsString(int i) {

String str = Integer.toString(i);

if(i<10) str="0"+str;

return str;

}

public void refreshTimeDisplay() {

Timestamp t= new Timestamp();

t.fillTimes();

String display = getDigitsAsString(t.hrs) + ":" + getDigitsAsString(t.mins) + ":" + getDigitsAsString

(t.secs);

tLabel.setText(" "+ display);

tLabel.repaint();

}

}

class Timestamp {

int hrs,mins,secs ;

void fillTimes() {

java.util.Calendar now ;

now = java.util.Calendar.getInstance() ;

hrs = now.get(java.util.Calendar.HOUR_OF_DAY);

mins = now.get(java.util.Calendar.MINUTE);

secs = now.get(java.util.Calendar.SECOND);

}

}

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