实验十四

实验代码：

package 实验十四;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class SwitchTest {

    private JFrame jFrame;
    private JLabel jl1;
    private JLabel jl2;
    private JLabel jl3;

    public static void main(String[] args) {
        new SwitchTest().getTime();
    }

    private void getTime() {
        long time = 3600 ;
        long hour = 0 ;
        long minute = 0 ;
        long seconds = 0 ;
        while (time > 0 ) {
            hour = time / 3600 ;
            minute = (time - hour * 3600 ) / 60 ;
            seconds = time - hour * 3600 - minute * 60 ;
            jl1.setText(hour + "时" );
jl2.setText(minute + "分" );
jl3.setText(seconds + "秒" );
try {
                Thread.sleep( 1000 );
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            time--;
        }
    }
    public SwitchTest() {
        jFrame = new JFrame( "倒计时" );
jl1 = new JLabel();
        jl2 = new JLabel();
        jl3 = new JLabel();
        init();
    }
    private void init() {
        JPanel jPanel = new JPanel();
        jPanel.add(jl1);
        jPanel.add(jl2);
        jPanel.add(jl3);
        jFrame.add(jPanel);
        jFrame.setVisible( true );
        jFrame.setLocation( 300 , 400 );
        jFrame.setSize( 300 , 200 );
        jFrame.setDefaultCloseOperation(jFrame.EXIT_ON_CLOSE);
    }
}


结果：