customerapplet.java

Appplet自己写的一些小程序,对新手很有帮助可以

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.applet.*;

class Customer implements Serializable
{
	String custName;
	String custPassword;
}

public class CustomerApplet extends JApplet
{
	JPanel panelObject;
	JLabel labelCustName;
	JLabel labelCustPassword;
	JTextField textCustName;
	JPasswordField textCustPassword;
	JButton buttonLogin;
	GridBagLayout gb;
	GridBagConstraints gbc;
	
	public CustomerApplet()
	{
		gb=new GridBagLayout();
		gbc=new GridBagConstraints();
		panelObject=(JPanel)getContentPane();
		panelObject.setLayout(gb);
		
		labelCustName=new JLabel("Customer Login Name");
		labelCustPassword=new JLabel("Password");
		textCustName=new JTextField(15);
		textCustPassword=new JPasswordField(15);
		buttonLogin=new JButton("Login");
		
		gbc.anchor=GridBagConstraints.NORTHWEST;
		gbc.gridx=1;
		gbc.gridy=5;
		gb.setConstraints(labelCustName,gbc);
		panelObject.add(labelCustName);
		
		gbc.anchor=GridBagConstraints.NORTHWEST;
		gbc.gridx=4;
		gbc.gridy=5;
		gb.setConstraints(textCustName,gbc);
		panelObject.add(textCustName);
		
		gbc.anchor=GridBagConstraints.NORTHWEST;
		gbc.gridx=1;
		gbc.gridy=9;
		gb.setConstraints(labelCustPassword,gbc);
		panelObject.add(labelCustPassword);
		
		gbc.anchor=GridBagConstraints.NORTHWEST;
		gbc.gridx=4;
		gbc.gridy=9;
		gb.setConstraints(textCustPassword,gbc);
		panelObject.add(textCustPassword);
		
		gbc.anchor=GridBagConstraints.NORTHWEST;
		gbc.gridx=2;
		gbc.gridy=13;
		gb.setConstraints(buttonLogin,gbc);
		panelObject.add(buttonLogin);
		
		LoginAction loginrequest=new LoginAction();
		buttonLogin.addActionListener(loginrequest);
		
	}
	class LoginAction implements ActionListener
	{
		public void actionPerformed(ActionEvent evt)
		{
			Object obj=evt.getSource();
			if(obj==buttonLogin)
			{
				Customer data=new Customer();
				data.custName=textCustName.getText();
				data.custPassword=new String(textCustPassword.getPassword());
				try
				{
					Socket toServer=new Socket("127.0.0.1",8080);
					
					BufferedReader fromServer=new BufferedReader(new InputStreamReader(toServer.getInputStream()));
					ObjectOutputStream streamToServer=new ObjectOutputStream(toServer.getOutputStream());
					streamToServer.writeObject((Customer)data);
				
					String status=fromServer.readLine();
					getAppletContext().showStatus(status);
	
					streamToServer.close();
					fromServer.close();
				}
				catch(InvalidClassException e)
				{
					System.out.println("The Customer class is invalid"+e);
				}
				catch(NotSerializableException e)
				{
					System.out.println("The object is not serializable"+e);
				}
				catch(IOException e)
				{
					System.out.println("Cannot write to the server"+e);
				}
			}
			
			}
		}
	public static void main(String args[])
	{
		CustomerApplet obj=new CustomerApplet();
		obj.setSize(400,300);
		obj.setVisible(true);
	}		
		
}
//<applet code="CustomerApplet.class" height=300 width=300>
//</applet>