client.java

JAVA语言编写的简单服务器与客服端的通信代码 包括Server.java和Client.java。 可实现两台主机间的通信

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;


public class Client extends JFrame {

	private final class ButtonListener implements ActionListener {

		@Override
		public void actionPerformed(ActionEvent e) {
			// TODO Auto-generated method stub
			try{
				double radius=Double.parseDouble(jtf.getText().trim());
				to.writeDouble(radius);
				to.flush();
				double area=from.readDouble();
				jta.append("Radius is "+radius+'\n');
				jta.append("Area received from the server is "+area+'\n');

			}catch(IOException ex){}
		}

	}
	/**
	 * @param args
	 */
	private JTextField jtf=new JTextField();
	private JTextArea jta=new JTextArea();
	private DataOutputStream to;
	private DataInputStream from;
	public Client()
	{
		JPanel p=new JPanel();
		p.setLayout(new BorderLayout());
		p.add(new JLabel("Enter radius"),BorderLayout.EAST);
		p.add(jtf,BorderLayout.CENTER);
		jtf.setHorizontalAlignment(JTextField.RIGHT);
		setLayout(new BorderLayout());
		add(p,BorderLayout.NORTH);
		add(new JScrollPane(jta),BorderLayout.CENTER);
		jtf.addActionListener(new ButtonListener());
		try{
			Socket socket=new Socket("localhost",8000);
			from=new DataInputStream(socket.getInputStream());
			to=new DataOutputStream(socket.getOutputStream());
			}
		catch(IOException ex){}
	}
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Client cc=new Client();
		cc.setTitle("Client");
		cc.setSize(350,250);
		cc.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		cc.setVisible(true);

	}

}