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さて、まずサーバーに接続するので、接続に問題はありません。次のコードは、接続とサーバーへのメッセージの送信を示しています。[実行] をクリックしても、JFrame が開きません。私のツールを参照してください...また、jMessage.getTextから取得したものをowsに送信しようとしていますが、次の行でエラーが発生します:

String process = jMessage.getText();

また、osw.write(process); を呼び出したいと思います。bSend ボタンをクリックしたときのみ、メイン メソッド内でこれを使用するにはどうすればよいですか? コードを見てください。また、JFrame がツールを表示する新しいウィンドウで開かないという最初の質問も覚えておいてください。netbeans コンソールで System.out.println を出力するだけです。

/*
 * 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
}
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1 に答える 1

1

この線

String process = jMessage.getText();

インスタンス変数であるstatic mainメソッドで宣言されているため、コンパイルエラーが発生します。jMessageメソッドにはたくさんのコードがあるので、それをメソッドmainに抽出して、次のlaunchAppように呼び出すことをお勧めします。

new TeKServer().launchApp();

新しいlaunchApp()方法では、

java.awt.EventQueue.invokeLater(new Runnable() {

    @Override
    public void run() {
        new TeKServer().setVisible(true);
    }
});

と

setVisible(true);

osw.write（process）;を呼び出したいです。bSendボタンをクリックしたときのみ

これを実行したい場合はosw、グローバルメンバー変数として維持できますが、 ソケットを無期限に開いたままにしておくことは、一般的に悪いアプローチです。必要な場合にのみソケットを開き、書き込みとクローズを提案します。

于 2012-09-22T09:27:01.143 に答える