timertime.java

图书管理系统v1.0是使用JAVA语言开发的解决图书基本管理的一个应用程序。 该系统能够实现简单的图书和用户管理

package lib;
import java.util.Timer;
import java.util.TimerTask;
import javax.swing.JLabel;
import java.util.Calendar;
import java.util.Date;
import java.text.DateFormat;
import javax.swing.JLabel;
import java.awt.*;
import java.awt.event.*;
/**
* this class is a timer that will display the time on a JLabel. The user can specify
* the amount time between each display.
*/


    public class TimerTime {
    	Timer timer;
    	Calendar cal;
    	Date date;
    	DateFormat dateFormatter;
    	
    	/**
    	 * Constructor used for running example main.
    	 */


        	public TimerTime(boolean visible,JLabel label,int seconds){
        		timer = new Timer();
        		timer.scheduleAtFixedRate(new DoTime(visible,label),0, seconds*1000);
        	}
        	/**
        	 * Constructor used for creating class in another application.
        	 */
        	public TimerTime(int seconds) {this(new JLabel(),seconds);}
        	public TimerTime() {this(new JLabel(),1);}
        	public TimerTime(JLabel label) {this(label, 1);}


            	public TimerTime(JLabel label, int seconds) {
            		timer = new Timer();
            		timer.scheduleAtFixedRate(new DoTime(label),0, seconds*1000);
        }


            	class DoTime extends TimerTask {
            		JLabel label = new JLabel();
            		boolean visible = false;
            		public DoTime(){}


                		public DoTime(boolean visible, JLabel label){
                			this.label = label;
                			this.visible = visible;
                		}
                		public DoTime(JLabel label){this.label = label;}


                    		public void run() {
                    			cal = Calendar.getInstance();
                    			date = cal.getTime();
                    			dateFormatter = DateFormat.getTimeInstance();
                    			label.setText(dateFormatter.format(date));
                }
                		public void timerCancel(){timer.cancel();}
            }

                        public void timerCancel(){timer.cancel();}
            }