输出写入到一个textarea在不同的类,而不是使用System.out.println
的我有称为readGUI的GUI类和称为监听器类主题输出写入到一个textarea在不同的类,而不是使用System.out.println
目的是从打印输出标题在textArea位于readGUI
我不知道如何做到这一点,但我试图追加textarea即。
在GUI类我加
public void receiveMsg (String s)
{ jTextArea1.append(s);
}
while in listner classs Topics I added the two lines after the commented out System.out.printlm(messageText)
public void onMessage(Message message)
{
try
{
String messageText = null;
if (message instanceof TextMessage)
messageText = ((TextMessage)message).getText();
// System.out.println(messageText);
readGUI rm = readGUI();
rm.receiveMsg(messageText);
}
catch (JMSException e)
{
e.printStackTrace();
}
}
读心人打印发布到正确的主题的消息,但不是在控制台上,我想放在结果上的GUI我从
被叫两个完整的类是下面是否有帮助 readGUI
public class readGUI extends javax.swing.JFrame {
/** Creates new form readMessages */
public readGUI() {
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();
topicCombobox = new javax.swing.JComboBox();
jScrollPane1 = new javax.swing.JScrollPane();
jTextArea1 = new javax.swing.JTextArea();
jLabel2 = new javax.swing.JLabel();
listenme = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jScrollPane2 = new javax.swing.JScrollPane();
jTextArea2 = new javax.swing.JTextArea();
jComboBox2 = new javax.swing.JComboBox();
jComboBox3 = new javax.swing.JComboBox();
jLabel3 = new javax.swing.JLabel();
jLabel4 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jLabel1.setFont(new java.awt.Font("Tahoma", 1, 14));
jLabel1.setText("Listen for specific messages");
// String [] tlist = { "topic1", "WGB1", "WGB2", "Item 4" };
topicCombobox.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "topic1", "WGB1", "WGB2", "Item 4" }));
jTextArea1.setColumns(20);
jTextArea1.setRows(5);
jScrollPane1.setViewportView(jTextArea1);
jLabel2.setText("Location:");
listenme.setText("Listen");
listenme.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jButton2.setText("Get complete log");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});
jTextArea2.setColumns(20);
jTextArea2.setRows(5);
jScrollPane2.setViewportView(jTextArea2);
jComboBox2.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Item 1", "Item 2", "Item 3", "Item 4" }));
jComboBox3.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Item 1", "Item 2", "Item 3", "Item 4" }));
jLabel3.setFont(new java.awt.Font("Tahoma", 0, 14)); // NOI18N
jLabel3.setText("Sensor");
jLabel4.setFont(new java.awt.Font("Tahoma", 0, 14)); // NOI18N
jLabel4.setText("Location");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(71, 71, 71)
.addComponent(jLabel2)
.addGap(30, 30, 30)
.addComponent(topicCombobox, javax.swing.GroupLayout.PREFERRED_SIZE, 129, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 81, Short.MAX_VALUE)
.addComponent(listenme, javax.swing.GroupLayout.PREFERRED_SIZE, 246, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(46, 46, 46))
.addGroup(layout.createSequentialGroup()
.addGap(219, 219, 219)
.addComponent(jLabel1)
.addContainerGap(239, Short.MAX_VALUE))
.addGroup(layout.createSequentialGroup()
.addGap(19, 19, 19)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addGap(22, 22, 22)
.addComponent(jLabel4, javax.swing.GroupLayout.PREFERRED_SIZE, 66, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jComboBox3, javax.swing.GroupLayout.PREFERRED_SIZE, 102, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(44, 44, 44)
.addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 60, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 50, Short.MAX_VALUE)
.addComponent(jComboBox2, javax.swing.GroupLayout.PREFERRED_SIZE, 83, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(32, 32, 32)
.addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 127, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(32, 32, 32))
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jScrollPane2, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 609, Short.MAX_VALUE)
.addComponent(jScrollPane1, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.PREFERRED_SIZE, 609, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(19, Short.MAX_VALUE))))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jLabel1)
.addGap(11, 11, 11)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 100, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(listenme)
.addComponent(topicCombobox, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 106, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jButton2)
.addComponent(jComboBox2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jComboBox3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel4)
.addComponent(jLabel3))
.addContainerGap(31, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
System.out.println("test test test");
System.out.print("you pressed" +topicCombobox.getSelectedItem());
//TopicPublish tp = new TopicPublish();
TopicS a = new TopicS();
a.addTopicToListner((String) topicCombobox.getSelectedItem());
//int i = topicCombobox.getSelectedIndex();
//a.addTopicToListner(tlist[i]);
}
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new readGUI().setVisible(true);
}
});
}
public void receiveMsg (String s)
{jTextArea1.append(s);
}
// Variables declaration - do not modify
private javax.swing.JButton listenme;
private javax.swing.JButton jButton2;
private javax.swing.JComboBox topicCombobox;
private javax.swing.JComboBox jComboBox2;
private javax.swing.JComboBox jComboBox3;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JLabel jLabel4;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JTextArea jTextArea1;
private javax.swing.JTextArea jTextArea2;
// End of variables declaration
}
个主题
import java.util.Hashtable;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.jms.Topic;
import javax.jms.TopicConnection;
import javax.jms.TopicConnectionFactory;
import javax.jms.TopicSession;
import javax.jms.TopicSubscriber;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
public class TopicS implements MessageListener
{
private TopicConnection topicConnection;
private TopicSession topicSession;
public Topic topic;
private TopicSubscriber topicSubscriber;
public TopicS()
{}
public void addTopicToListner(String t){
try
{
// create a JNDI context
Hashtable properties = new Hashtable();
properties.put(Context.INITIAL_CONTEXT_FACTORY,"org.exolab.jms.jndi.InitialContextFactory");
properties.put(Context.PROVIDER_URL,"rmi://localhost:1099/");
Context context = new InitialContext(properties);
// retrieve topic connection factory
TopicConnectionFactory topicConnectionFactory =
(TopicConnectionFactory)context.lookup("JmsTopicConnectionFactory");
// create a topic connection
topicConnection = topicConnectionFactory.createTopicConnection();
// create a topic session
// set transactions to false and set auto acknowledgement of receipt of messages
topicSession = topicConnection.createTopicSession(false,Session.AUTO_ACKNOWLEDGE);
// retrieve topic
topic = (Topic) context.lookup(t);
// create a topic subscriber and associate to the retrieved topic
topicSubscriber = topicSession.createSubscriber(topic);
// associate message listener
topicSubscriber.setMessageListener(this);
// start delivery of incoming messages
topicConnection.start();
}
catch (NamingException e)
{
e.printStackTrace();
}
catch (JMSException e)
{
e.printStackTrace();
}
}
/* public static void main(String[] args)
//{
try
{
TopicS listener = new TopicS();
Thread.currentThread().sleep(2000);
}
catch (InterruptedException e)
{
e.printStackTrace();
}
}
*/
// process incoming topic messages
public void onMessage(Message message)
{
try
{
String messageText = null;
if (message instanceof TextMessage)
messageText = ((TextMessage)message).getText();
// System.out.println(messageText);
readGUI rm = readGUI();
rm.receiveMsg(messageText);
}
catch (JMSException e)
{
e.printStackTrace();
}
}
}
如果要添加文本的组成部分,这项工作正在做不 GUI线程你将有问题的。这似乎是你在这里做的。使用
SwingUtilities.invokeLater(new Runnable() {
public void run() {
rm.receiveMsg(messageText);
}
});
因此,这项工作是在gui线程上完成的。
,我也想知道你用这个做什么:
readGUI rm = readGUI();
好像你正试图调用构造函数,而无需创建一个对象或东西。
你添加的代码在哪里?我也可以使用readGUI rm = readGUI()的思想,我可以将输出的文本发送到readGUI的JtextArea1中。在readGUI中,所以也许我误解了你写的第一行文字 我很感谢你的回复,但我仍然不能100%确定如何继续,谢谢 – skal 2011-03-24 00:51:33
某段代码可能已经创建了一个readGUI类的实例,并显示窗口。所以TopicS实例需要引用readGUI类的特定实例。所以你应该改变你的TopicS构造函数来获取一个readGUI的实例并将该引用存储在一个成员变量中。然后,当你想填充该字段时,引用该字段。 – MeBigFatGuy 2011-03-24 03:01:28
可能重复的[如何将控制台内容重定向到java中的textArea?](http://*.com/questions/5107629/how-to-redirect-console-content-to-a-textarea-in- java) – trashgod 2011-03-24 00:04:24