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);
    }
}
实验心得：实验总体有点难 还需多加练习。