Java 如何将一个窗格连接到另一个窗格

如何将输出连接到

窗格项目列表

PaneWithList

在其

JList

上有一个侦听器，以便将所选行输出到控制台。如何将该输出定向到输出上的

JTextPane

PaneWithList

能否触发

Main

拾取的事件？够了吗

Main.java：

package dur.bounceme.net;

import javax.swing.JTabbedPane;

public class Main {

    private static JTabbedPane tabs;
    private static PaneWithList paneWithList;
    private static PaneWithTable paneWithTable;
    private static Output output;

    public static void main(String[] args) {
        tabs = new javax.swing.JTabbedPane();
        paneWithList = new PaneWithList();
        paneWithTable = new PaneWithTable();
        tabs.addTab("list", paneWithList);
        tabs.addTab("table", paneWithTable);
        tabs.addTab("output", output);
    }
}

---

下面是一个使用、也可以看到和的示例。注意，也可以听组合的模型

import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.*;

/**
* @see http://en.wikipedia.org/wiki/Observer_pattern
* @see https://stackoverflow.com/a/10523401/230513
*/
public class PropertyChangeDemo {

    public PropertyChangeDemo() {
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setResizable(false);
        f.add(new ObserverPanel());
        f.pack();
        f.setLocationByPlatform(true);
        f.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                PropertyChangeDemo example = new PropertyChangeDemo();
            }
        });
    }
}

class ObserverPanel extends JPanel {

    private JLabel title = new JLabel("Value received: ");
    private JLabel label = new JLabel("null", JLabel.CENTER);

    public ObserverPanel() {
        this.setBorder(BorderFactory.createTitledBorder("ObserverPanel"));
        JPanel panel = new JPanel(new GridLayout(0, 1));
        panel.add(title);
        panel.add(label);
        this.add(panel);
        ObservedPanel observed = new ObservedPanel();
        observed.addPropertyChangeListener(new PropertyChangeListener() {

            @Override
            public void propertyChange(PropertyChangeEvent e) {
                if (e.getPropertyName().equals(ObservedPanel.PHYSICIST)) {
                    String value = e.getNewValue().toString();
                    label.setText(value);
                }
            }
        });
        this.add(observed);
    }
}

class ObservedPanel extends JPanel {

    public static final String PHYSICIST = "Physicist";
    private static final String[] items = new String[]{
        "Alpher", "Bethe", "Gamow", "Dirac", "Einstein"
    };
    private JComboBox combo = new JComboBox(items);
    private String oldValue;

    public ObservedPanel() {
        this.setBorder(BorderFactory.createTitledBorder("ObservedPanel"));
        combo.addActionListener(new ComboBoxListener());
        this.add(combo);
    }

    private class ComboBoxListener implements ActionListener {

        @Override
        public void actionPerformed(ActionEvent ae) {
            String newValue = (String) combo.getSelectedItem();
            firePropertyChange(PHYSICIST, oldValue, newValue);
            oldValue = newValue;
        }
    }
}

---

我会使用通过使用而不是非常复杂的内容来进行分层，以供我自己参考，对于任何使用Netbeans GUI builder的人来说，这都是可行的：

PanelWithList类：

package dur.bounceme.net;

public class PanelWithList extends javax.swing.JPanel {

    public PanelWithList() {
        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() {

        jScrollPane1 = new javax.swing.JScrollPane();
        jList1 = new javax.swing.JList();
        jScrollPane2 = new javax.swing.JScrollPane();
        jTextArea1 = new javax.swing.JTextArea();

        jList1.setModel(new javax.swing.AbstractListModel() {
            String[] strings = { "Item 1", "Item 2", "Item 3", "Item 4", "Item 5" };
            public int getSize() { return strings.length; }
            public Object getElementAt(int i) { return strings[i]; }
        });
        jList1.setSelectionMode(javax.swing.ListSelectionModel.SINGLE_SELECTION);
        jList1.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jList1MouseClicked(evt);
            }
        });
        jList1.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyReleased(java.awt.event.KeyEvent evt) {
                jList1KeyReleased(evt);
            }
        });
        jScrollPane1.setViewportView(jList1);

        jTextArea1.setColumns(20);
        jTextArea1.setRows(5);
        jScrollPane2.setViewportView(jTextArea1);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
        this.setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(54, 54, 54)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 247, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 308, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(167, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(35, 35, 35)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(jScrollPane2)
                    .addComponent(jScrollPane1))
                .addContainerGap(166, Short.MAX_VALUE))
        );
    }// </editor-fold>                        

    private void jList1MouseClicked(java.awt.event.MouseEvent evt) {                                    
        row();
    }                                   

    private void jList1KeyReleased(java.awt.event.KeyEvent evt) {                                   
        row();
    }                                  
    // Variables declaration - do not modify                     
    private javax.swing.JList jList1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JTextArea jTextArea1;
    // End of variables declaration                   

    private void row() {
        Object o = jList1.getSelectedValue();
        String s = (String)o;
        jTextArea1.setText(s);
        this.firePropertyChange("list", -1, 1);
    }
}

package dur.bounceme.net；
公共类PanelWithList扩展了javax.swing.JPanel{
公共小组成员（）{
初始化组件（）；
}
/**
*从构造函数中调用此方法来初始化表单。
*警告：不要修改此代码。此方法的内容始终为
*由表单编辑器重新生成。
*/
@抑制警告（“未选中”）
//                           
私有组件（）{
jScrollPane1=newjavax.swing.JScrollPane（）；
jList1=newjavax.swing.JList（）；
jScrollPane2=newjavax.swing.JScrollPane（）；
jTextArea1=newjavax.swing.JTextArea（）；
setModel（新的javax.swing.AbstractListModel（）{
字符串[]字符串={“项目1”、“项目2”、“项目3”、“项目4”、“项目5”}；
public int getSize（）{return strings.length；}
公共对象getElementAt（inti）{返回字符串[i]；}
});
jList1.setSelectionMode（javax.swing.ListSelectionModel.SINGLE_SELECTION）；
jList1.addMouseListener（新java.awt.event.MouseAdapter（）{
public void mouseClicked（java.awt.event.MouseEvent evt）{
jList1MouseClicked（evt）；
}
});
jList1.addKeyListener（新java.awt.event.KeyAdapter（）{
public void keyReleased（java.awt.event.KeyEvent evt）{
JLIST1KEY已发布（evt）；
}
});
jScrollPane1.setViewportView（jList1）；
jTextArea1.设置列（20）；
jTextArea1.设置行（5）；
jScrollPane2.setViewportView（jTextArea1）；
javax.swing.GroupLayout=newjavax.swing.GroupLayout（this）；
这个.setLayout（布局）；
layout.setHorizontalGroup(
createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（layout.createSequentialGroup（）
.addGap（54,54,54）
.addComponent（jScrollPane1，javax.swing.GroupLayout.PREFERRED_SIZE，247，javax.swing.GroupLayout.PREFERRED_SIZE）
.addPreferredGap（javax.swing.LayoutStyle.ComponentPlacement.UNRELATED）
.addComponent（jScrollPane2，javax.swing.GroupLayout.PREFERRED\u SIZE，308，javax.swing.GroupLayout.PREFERRED\u SIZE）
.addContainerGap（167，简称最大值））
);
layout.setVerticalGroup(
createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（layout.createSequentialGroup（）
.addGap（35,35,35）
.addGroup（layout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING，false）
.addComponent（jScrollPane2）
.addComponent（jScrollPane1））
.addContainerGap（166，简称最大值））
);
}//                         
私有void jList1MouseClicked（java.awt.event.MouseEvent evt）{
行（）；
}                                   
private void jlist1keyereleased（java.awt.event.KeyEvent evt）{
行（）；
}                                  
//变量声明-不修改
私有javax.swing.JList jList1；
私有javax.swing.JScrollPane-jScrollPane1；
私有javax.swing.JScrollPane-jScrollPane2；
私有javax.swing.JTextArea jTextArea1；
//变量结束声明
私有无效行（）{
对象o=jList1.getSelectedValue（）；
字符串s=（字符串）o；
jTextArea1.设置文本；
此。firePropertyChange（“列表”、-1、1）；
}
}

和Frame.java作为驱动程序：

package dur.bounceme.net;

public class Frame extends javax.swing.JFrame {

    public Frame() {
        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() {

        jTabbedPane1 = new javax.swing.JTabbedPane();
        panelWithList1 = new dur.bounceme.net.PanelWithList();
        panelWithTable1 = new dur.bounceme.net.PanelWithTable();
        newJPanel1 = new dur.bounceme.net.PanelWithCombo();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        panelWithList1.addPropertyChangeListener(new java.beans.PropertyChangeListener() {
            public void propertyChange(java.beans.PropertyChangeEvent evt) {
                panelWithList1PropertyChange(evt);
            }
        });
        jTabbedPane1.addTab("tab1", panelWithList1);
        jTabbedPane1.addTab("tab2", panelWithTable1);
        jTabbedPane1.addTab("tab3", newJPanel1);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 937, Short.MAX_VALUE)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addContainerGap()
                    .addComponent(jTabbedPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 913, Short.MAX_VALUE)
                    .addContainerGap()))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 555, Short.MAX_VALUE)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addContainerGap()
                    .addComponent(jTabbedPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 521, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addContainerGap(22, Short.MAX_VALUE)))
        );

        pack();
    }// </editor-fold>

    private void panelWithList1PropertyChange(java.beans.PropertyChangeEvent evt) {
        System.out.println("panelWithList1PropertyChange ");

    }

    /**
     * @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(Frame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(Frame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(Frame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(Frame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /*
         * Create and display the form
         */
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                new Frame().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify
    private javax.swing.JTabbedPane jTabbedPane1;
    private dur.bounceme.net.PanelWithCombo newJPanel1;
    private dur.bounceme.net.PanelWithList panelWithList1;
    private dur.bounceme.net.PanelWithTable panelWithTable1;
    // End of variables declaration
}

package dur.bounceme.net；
公共类框架扩展了javax.swing.JFrame{
公共框架（）{
初始化组件（）；
}
/**
*从构造函数中调用此方法来初始化表单。
*警告：不要修改此代码。此方法的内容始终为
*由表单编辑器重新生成。
*/
@抑制警告（“未选中”）
// 
私有组件（）{
jTabbedPane1=newjavax.swing.JTabbedPane（）；
panelWithList1=new dur.bounceme.net.PanelWithList（）；
panelWithTable1=新的dur.bounceme.net.PanelWithTable（）；
newJPanel1=new dur.bounceme.net.PanelWithCombo（）；
setDefaultCloseOperation（javax.swing.WindowConstants.EXIT_ON_CLOSE）；
panelWithList1.addPropertyChangeListener（新java.beans.PropertyChangeListener（）{
public void propertyChange（java.beans.PropertyChangeEvent evt）{
具有列表1属性更改（evt）的面板；
}
});
jTabbedPane1.addTab（“tab1”，panelWithList1）；
jTabbedPane1.addTab（“tab2”，带表1的面板）；
jTabbedPane1.addTab（“tab3”，newJPanel1）；
javax.swing.GroupLayout=newjavax.swing.GroupLayout（getContentPane（））；
getContentPane（）.setLayout（布局）；
layout.setHorizontalGroup(
createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGap（0，937，短。最大值）
.addGroup（layout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup(