编写一数据报通信程序，实现简单的聊天功能。
“聊天内容”和“输入文本”分别为当前聊天的历史信息和当前要传送出去的聊天文本。“确定”、“清空”、“退出”三个按钮分别实现发送当前聊天文本、清空当前聊天文本和退出系统的功能。
| import java.awt.Font; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.WindowEvent; import java.awt.event.WindowListener; import java.net.DatagramPacket; import java.net.DatagramSocket; import java.net.InetAddress; import java.net.SocketException; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JScrollBar; import javax.swing.JScrollPane; import javax.swing.JTextArea; import javax.swing.JTextField; public class Frame extends JFrame implements WindowListener{ private JTextArea text; private JTextField ipText; private JTextField sendText; private JButton button; private JButton button1; private JButton button2; private DatagramSocket socket; private JScrollBar vsBar; public Frame(){ setTitle("聊天器"); setBounds(100, 150,481, 371); text=new JTextArea(); text.setEditable(true); setLayout(null); JScrollPane textPanel = new JScrollPane(text); vsBar = textPanel.getVerticalScrollBar(); textPanel.setBounds(10,10, 320, 240); getContentPane().add(textPanel); JLabel label=new JLabel("请输入对方IP："); label.setFont(new Font("",Font.BOLD,14)); label.setBounds(342, 24, 110, 24); getContentPane().add(label); ipText = new JTextField(); ipText.setBounds(352, 54, 111, 31); getContentPane().add(ipText); button=new JButton(); button.setText("确定"); button.setBounds(363, 135, 85, 47); button.setFont(new Font("",Font.BOLD,23)); getContentPane().add(button); button.addActionListener(new send()); button1=new JButton("清空"); button1.setBounds(363, 200, 85, 47); button1.setFont(new Font("",Font.BOLD,23)); getContentPane().add(button1); button1.addActionListener(new clear()); button2=new JButton("退出"); button2.setBounds(363, 260, 85, 47); button2.setFont(new Font("",Font.BOLD,23)); getContentPane().add(button2); button2.addActionListener(new exit()); this.addWindowListener(this); sendText = new JTextField(); sendText.setBounds(10, 260, 320, 47); getContentPane().add(sendText); //server(); pack(); setVisible(true); } |
