好吧首先它连接到服务器所以连接没有问题，下面的代码显示连接并向服务器发送消息，当我点击运行时它没有打开JFrame，窗口我可以在哪里看到我的工具...我也试图将我从jMessage.getText中获得的内容发送到ows，但是我在这一行收到错误：
String process = jMessage.getText();
另外我想调用osw.write（process）;只有当我点击bSend按钮时，我怎么能在main方法中使用它？请看一下代码，还记得我的JFrame在新窗口中打开的第一个问题，向我展示我的工具，它只是在netbeans控制台打印出System.out.println：
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package tcpservidor;
import java.io.*;
import java.net.InetAddress;
import java.net.Socket;
/**
*
* @author Damage
*/
public class TeKServer extends javax.swing.JFrame {
/**
* Creates new form TeKServer
*/
public TeKServer() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jLabel1 = new javax.swing.JLabel();
jScrollPane1 = new javax.swing.JScrollPane();
textArea = new javax.swing.JTextArea();
jMessage = new javax.swing.JTextField();
bSendMessage = new javax.swing.JButton();
jLabel2 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jLabel1.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
jLabel1.setText("Chat Client");
textArea.setColumns(20);
textArea.setRows(5);
textArea.setEnabled(false);
jScrollPane1.setViewportView(textArea);
bSendMessage.setText("Send");
bSendMessage.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
bSendMessageActionPerformed(evt);
}
});
jLabel2.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
jLabel2.setText("Message");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addGap(0, 0, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addComponent(jLabel1)
.addGap(294, 294, 294))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addComponent(jLabel2)
.addGap(303, 303, 303))))
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1)
.addComponent(jMessage))
.addContainerGap())
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addGap(0, 291, Short.MAX_VALUE)
.addComponent(bSendMessage, javax.swing.GroupLayout.PREFERRED_SIZE, 81, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(286, 286, 286))))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jLabel1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 319, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jLabel2)
.addGap(3, 3, 3)
.addComponent(jMessage, javax.swing.GroupLayout.PREFERRED_SIZE, 61, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(bSendMessage)
.addContainerGap())
);
pack();
}// </editor-fold>
private void bSendMessageActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/*
* Set the Nimbus look and feel
*/
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/*
* If Nimbus (introduced in Java SE 6) is not available, stay with the
* default look and feel. For details see
* http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(TeKServer.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(TeKServer.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(TeKServer.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(TeKServer.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/** Define a host server */
String host = "192.168.0.8";
/** Define a port */
int port = 7777;
StringBuffer instr = new StringBuffer();
String TimeStamp;
System.out.println("SocketClient initialized");
try {
/** Obtain an address object of the server */
InetAddress address = InetAddress.getByName(host);
/** Establish a socket connetion */
Socket connection = new Socket(address, port);
System.out.println("Connection Established!");
/** Instantiate a BufferedOutputStream object */
BufferedOutputStream bos = new BufferedOutputStream(connection.
getOutputStream());
/** Instantiate an OutputStreamWriter object with the optional character
* encoding.
*/
OutputStreamWriter osw = new OutputStreamWriter(bos, "US-ASCII");
TimeStamp = new java.util.Date().toString();
String process = jMessage.getText();
/** Write across the socket connection and flush the buffer */
osw.write(process);
osw.flush();
/** Instantiate a BufferedInputStream object for reading
/** Instantiate a BufferedInputStream object for reading
* incoming socket streams.
*/
BufferedInputStream bis = new BufferedInputStream(connection.
getInputStream());
/**Instantiate an InputStreamReader with the optional
* character encoding.
*/
InputStreamReader isr = new InputStreamReader(bis, "US-ASCII");
/**Read the socket's InputStream and append to a StringBuffer */
int c;
while ( (c = isr.read()) != 13)
instr.append( (char) c);
/** Close the socket connection. */
connection.close();
System.out.println(instr);
}
catch (IOException f) {
System.out.println("IOException: " + f);
}
catch (Exception g) {
System.out.println("Exception: " + g);
}
/*
* Create and display the form
*/
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new TeKServer().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton bSendMessage;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
public javax.swing.JTextField jMessage;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTextArea textArea;
// End of variables declaration
}
答案 0 :(得分：1)
该行
String process = jMessage.getText();
导致编译错误，因为它在static main方法中声明jMessage是一个实例变量。由于您在main方法中有很多代码，我建议将其解压缩为launchApp方法并将其调用为：
new TeKServer().launchApp();
在新的launchApp()方法中，您将替换
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new TeKServer().setVisible(true);
}
});
带
setVisible(true);
我想调用osw.write（process）;仅当我点击bSend按钮
时
如果您想这样做，您可以将osw维护为全局成员变量 ，但 持有无限长时间的套接字是一种糟糕的方法通常。建议只在需要时打开一个插座，写一下＆amp;关闭。