在下面给出的程序中，我在“a”上实现了actionlistener，当按钮“H”上发生点击事件时，应该出现询问坐标的新窗口但是我正在
java.lang.UnsupportedOperationException：不支持异常
我很感激任何建议。我已经包括了两个课程。
// class:TextEditor.java
import java.awt.event.ActionListener;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
import static javax.swing.JFrame.EXIT_ON_CLOSE;
import javax.swing.text.*;
public class TextEditor extends JFrame {
static int fn=0;
private JTextArea area = new JTextArea(20,120);
//TextEditor frm = new TextEditor(10,10);
private JFileChooser dialog = new JFileChooser(System.getProperty("user.dir"));
private String currentFile = "Untitled";
private boolean changed = false;
private JButton a = new JButton("H");
private JButton b = new JButton("HE");
private JButton c = new JButton("O");
public TextEditor() {
setLayout( new FlowLayout() );
area.setFont(new Font("Monospaced",Font.PLAIN,12));
JScrollPane scroll = new JScrollPane(area,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
add(scroll,BorderLayout.CENTER);
add(a);// add the button to the JFrame
add(b);
add(c);
JMenuBar JMB = new JMenuBar();
setJMenuBar(JMB);
JMenu file = new JMenu("File");
JMenu edit = new JMenu("Edit");
JMB.add(file); JMB.add(edit);
a.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
CircleComponent a1 = new CircleComponent();
a1.a2();
selectionButtonPressed();
}
private void selectionButtonPressed() {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
} );
file.add(New);
file.add(Open);
file.add(Save);
file.add(SaveAs);
file.add(Quit);
file.addSeparator();
for(int i=0; i<4; i++)
file.getItem(i).setIcon(null);
edit.add(Cut);
edit.add(Copy);
edit.add(Paste);
edit.getItem(0).setText("Cut out");
edit.getItem(1).setText("Copy");
edit.getItem(2).setText("Paste");
JToolBar tool = new JToolBar();
add(tool,BorderLayout.NORTH);
tool.add(New);
tool.add(Open);tool.add(Save);
tool.addSeparator();
JButton cut = tool.add(Cut), cop = tool.add(Copy),pas = tool.add(Paste);
cut.setText(null); cut.setIcon(new ImageIcon("cut.gif"));
cop.setText(null); cop.setIcon(new ImageIcon("copy.gif"));
pas.setText(null); pas.setIcon(new ImageIcon("paste.gif"));
//Save.setEnabled(false);
//SaveAs.setEnabled(false);
setDefaultCloseOperation(EXIT_ON_CLOSE);
pack();
area.addKeyListener(k1);
setTitle(currentFile);
setVisible(true);
}
private KeyListener k1 = new KeyAdapter() {
public void keyPressed(KeyEvent e) {
changed = true;
Save.setEnabled(true);
SaveAs.setEnabled(true);
}
};
Action New = new AbstractAction("New", new ImageIcon("new.gif")) {
public void actionPerformed(ActionEvent e) {
saveOld();
currentFile = "Untitled";
setTitle(currentFile);
changed = false;
area.setText(null);
}
};
Action Open = new AbstractAction("Open", new ImageIcon("open.gif")) {
public void actionPerformed(ActionEvent e) {
saveOld();
if(dialog.showOpenDialog(null)==JFileChooser.APPROVE_OPTION) {
readInFile(dialog.getSelectedFile().getAbsolutePath());
}
SaveAs.setEnabled(true);
}
};
Action Save = new AbstractAction("Save", new ImageIcon("save.gif")) {
public void actionPerformed(ActionEvent e) {
if(!currentFile.equals("Untitled"))
saveFile(currentFile);
else
saveFileAs();
}
};
Action SaveAs = new AbstractAction("Save as...") {
public void actionPerformed(ActionEvent e) {
saveFileAs();
}
};
Action Quit = new AbstractAction("Quit") {
public void actionPerformed(ActionEvent e) {
saveOld();
System.exit(0);
}
};
private TextEditor(int i, int i0) {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
ActionMap m = area.getActionMap();
Action Cut = m.get(DefaultEditorKit.cutAction);
Action Copy = m.get(DefaultEditorKit.copyAction);
Action Paste = m.get(DefaultEditorKit.pasteAction);
private void saveFileAs() {
if(dialog.showSaveDialog(null)==JFileChooser.APPROVE_OPTION)
saveFile(dialog.getSelectedFile().getAbsolutePath());
}
private void saveOld() {
if(changed) {
if(JOptionPane.showConfirmDialog(this, "Would you like to save "+ currentFile +" ?","Save",JOptionPane.YES_NO_OPTION)== JOptionPane.YES_OPTION)
saveFile(currentFile);
}
}
private void readInFile(String fileName) {
try {
FileReader r = new FileReader(fileName);
area.read(r,null);
r.close();
currentFile = fileName;
setTitle(currentFile);
changed = false;
}
catch(IOException e) {
Toolkit.getDefaultToolkit().beep();
JOptionPane.showMessageDialog(this,"Editor can't find the file called "+fileName);
}
}
private void saveFile(String fileName) {
try {
FileWriter w = new FileWriter(fileName);
area.write(w);
w.close();
currentFile = fileName;
setTitle(currentFile);
changed = false;
Save.setEnabled(false);
}
catch(IOException e) {
}
}
public static void main(String[] arg) {
new TextEditor();
}
private void setsize(int i, int i0) {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
private void a() {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
private void a2() {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
}
//circlecomponent
import java.awt.event.ActionListener;
import java.awt.event.*;
import java.awt.geom.*;
import javax.swing.*;
import java.awt.*;
public class CircleComponent extends JPanel
{
Ellipse2D.Double circle;
public CircleComponent(int radius)
{
circle = new Ellipse2D.Double(0, 0, radius, radius);
setOpaque(false);
}
CircleComponent() {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
public Dimension getPreferredSize()
{
Rectangle bounds = circle.getBounds();
return new Dimension(bounds.width, bounds.height);
}
public void paintComponent(Graphics g)
{
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
g2.setColor( getForeground() );
g2.fill(circle);
}
/*
public int getWidth(int aWidth)
{
width = aWidth;
return width;
}
*/
public void a2()
{
// Create a panel using a null layout so we can add components at random positions
final JPanel center = new JPanel();
center.setLayout(null);
JButton button = new JButton("Draw");
button.addActionListener( new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
String x = JOptionPane.showInputDialog("X Coordinate", "Enter an x coordinate");
try{
int xCoord = Integer.parseInt(x);
String y = JOptionPane.showInputDialog("Y Coordinate", "Enter a y coordinate");
int yCoord = Integer.parseInt(y);
String width = JOptionPane.showInputDialog("Radius", "Enter the length of the radius");
int radius = Integer.parseInt(width);
CircleComponent component = new CircleComponent(radius);
component.setLocation(xCoord,yCoord);
component.setSize(component.getPreferredSize());
center.add(component);
center.repaint();
}catch(NumberFormatException ex){
System.err.println("Ilegal input");
}
}
});
JFrame frame = new JFrame();
frame.add(center, BorderLayout.CENTER);
frame.add(button, BorderLayout.NORTH);
frame.setSize(500, 500);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
void addActionListener() {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
void addActionListener(ActionListener actionListener) {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
/* CircleComponent() {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
CircleComponent() {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
CircleComponent() {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}*/
}