timeclient.java

客户端从服务器获取时间

import java.rmi.*;
import java.rmi.server.*;
import java.util.*;
import javax.swing.*;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.rmi.*;

public class timeClient extends UnicastRemoteObject implements timeClientInterface{
	myTime mytime = new myTime(new Date()) ;
	timeClient timeclient;

	public timeClient()throws RemoteException{
		super();
	}
	public void setClient(timeClient timeclient){
		this.timeclient = timeclient;
	}
	public void updateTime(Date date)throws RemoteException{
		System.out.println("the current time is: "+date.getHours()+":"+date.getMinutes()+":"+date.getSeconds());
		mytime.reDraw(date);
		mytime.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}


 class myTime extends JFrame {
	private JTextField textField1,textField2;
	private JButton button1,button2;
	private JLabel label1 = new JLabel("间隔");
	private JLabel label2 = new JLabel("秒显示");
	private JLabel label3 = new JLabel("当前时间");
	private JPanel panel,panel2;
	//String registryURL;
	private timeServerInterface h;

	

	ClockCanvas clock;
	 public myTime(Date date){
		super("time");
		Container container  = getContentPane();
		container.setLayout(new BorderLayout());
		panel = new JPanel();
		panel.setLayout(new FlowLayout());
		panel2 = new JPanel();
		panel2.setLayout(new FlowLayout());
		textField1 = new JTextField(15);
		textField2 = new JTextField("1",2);
		button1 = new JButton("连接");
		button1.addActionListener(new Connect());
		button2 = new JButton("断开");
		button2.addActionListener(new Disconnect());
		panel.add(label1);
		panel.add(textField2);
		panel.add(label2);
		panel.add(button1);
		panel.add(button2);
		panel2.add(label3);
		panel2.add(textField1);
		container.add(panel,BorderLayout.NORTH);
		clock = new ClockCanvas(date);
		container.add(clock,BorderLayout.CENTER);
		container.add(panel2,BorderLayout.SOUTH);
		setSize(450,200);
		setVisible(true);
	 }

	class ClockCanvas extends JPanel{
		Date dat ;
		int xcenter = 200, ycenter = 50;
		int Radius = ycenter-5;
		public ClockCanvas(Date date){
			setSize(400,125);
			dat = date;
		}

		public void paintComponent(Graphics g){
			super.paintComponent(g);
			int xh,yh,xm,ym,xs,ys,s,m,h;
			String today;
			s=dat.getSeconds(); //获得时间秒
			m=dat.getMinutes(); //获得时间分
			h=dat.getHours();
			today=dat.toLocaleString(); //获得字符串时间格式

			textField1.setText(today);

			//计算秒的坐标
			xs=(int)(Math.cos(s*3.14f/30-3.14f/2)*(Radius-5)+xcenter);
			ys=(int)(Math.sin(s*3.14f/30-3.14f/2)*(Radius-5)+ycenter); //计算分钟的坐标
			xm=(int)(Math.cos(m*3.14f/30-3.14f/2)*(Radius-10)+xcenter);
			ym=(int)(Math.sin(m*3.14f/30-3.14f/2)*(Radius-10)+ycenter); //计算小时的坐标
			xh=(int)(Math.cos((h*30+m/2)*3.14f/180-3.14f/2)*(Radius-20)+xcenter);
			yh=(int)(Math.sin((h*30+m/2)*3.14f/180-3.14f/2)*(Radius-20)+ycenter);
			g.setColor(Color.darkGray); //设置颜色
			g.drawString("9",xcenter-(Radius-5),ycenter+3); //显示时钟上的数字‘9’
			g.drawString("3",xcenter+(Radius-10),ycenter+3); //显示时钟上的数字‘3’
			g.drawString("12",xcenter-5,ycenter-(Radius-13)); //显示时钟上的数字'12'
			g.drawString("6",xcenter-3,ycenter+(Radius-10)); //显示时钟上的数字'6'
			g.drawString(today,0,125); //显示字符串时钟
			g.drawLine(xcenter,ycenter,xs,ys); //画秒针
			g.setColor(Color.blue); //设置颜色
			g.drawArc(xcenter-Radius,ycenter-Radius,2*Radius,2*Radius,0,360); //画钟
			g.drawLine(xcenter,ycenter-1,xm,ym); //画分针
			g.drawLine(xcenter-1,ycenter,xm,ym); //画分针
			g.drawLine(xcenter,ycenter-1,xh,yh); //画时针
			g.drawLine(xcenter-1,ycenter,xh,yh); //画时针	//setVisible(true);
		}	

		public void redraw(Date date){
			dat = date;
			repaint();
		}
	
	}	
	class Connect implements ActionListener{
		public void actionPerformed(ActionEvent e){
			try{
			String timeDuration = textField2.getText();
			int time = Integer.parseInt(timeDuration);
			System.out.println(time);
			String registryURL = "rmi://localhost"+":"+2345+"/callback";
			h = (timeServerInterface)Naming.lookup(registryURL);
			System.out.println("Lookup complete");
			Date date = h.getTime();
			System.out.println("the current time is: "+date.getHours()+":"+date.getMinutes()+":"+date.getSeconds());
			String today=date.toLocaleString(); //获得字符串时间格式
			textField1.setText(today);
			h.register(timeclient,time);
			}
			catch(Exception re){
			System.out.println("Exception in CallbackClient: "+re);
			}
		}
	}
	
	class Disconnect implements ActionListener{
		public void actionPerformed(ActionEvent e){
			try{
				h.unregister(timeclient);
			}catch(RemoteException re){
				System.out.println("RemoteException in myTime's Disconnect of timeClient :"+re);
			}
		}
	}

	 public  void reDraw(Date date){
		 clock.redraw(date);
	 }
 }


	public static void main(String[] args){
		try{
		 timeClient timeclient =  new timeClient();
		 timeclient.setClient(timeclient);
		}catch(RemoteException re){
			System.out.println("RemoteException of timeClientImp: "+re);
		}
		
	}

}