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所以我有下面的代码，每当我按下方形工具按钮，它应该在左手边画一个方形，但我甚至不能让控制台打印它的消息。这让我认为actionListener从来没有响应我的点击。任何人都可以帮忙吗？ActionListener和JButtons
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenuBar;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class Game extends JPanel implements ActionListener {
private static final long serialVersionUID = 1L;
private GridPane gridPane;
private DragPanel drag;
public boolean isMouseClicked = false;
public static JMenuBar bar = new JMenuBar();
public int gridY = 1;
public int gridX = 1;
public int x = 0,y = 0;
public Game() {
setLayout(new BorderLayout());
OptionPanel options = new OptionPanel();
options.addActionListener(this);
add(options, BorderLayout.NORTH);
gridPane = new GridPane();
gridPane.setBorder(BorderFactory.createLineBorder(Color.white));
add(gridPane);
drag = new DragPanel();
drag.setBorder(BorderFactory.createLineBorder(Color.white));
drag.setBackground(new Color(100,100,125));
add(drag,BorderLayout.WEST);
}
public static void main(String args[]) {
Game game = new Game();
JFrame frame = new JFrame();
frame.setVisible(true);
frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
frame.setTitle("Game");
frame.setAlwaysOnTop(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(game);
}
@Override
public void actionPerformed(ActionEvent e) {
if (e.getActionCommand().equalsIgnoreCase("grid")) {
gridPane.setGridOn(!gridPane.isGridOn());
}
if (e.getActionCommand().equalsIgnoreCase("square")){
gridPane.setSqaureOn(!gridPane.isSquareOn());
}
if (e.getActionCommand().equalsIgnoreCase("vgrid")){
gridPane.setVertOn(!gridPane.isVertOn());
}
}
public class GridPane extends JPanel {
private static final long serialVersionUID = 1L;
private boolean gridOn = false;
private boolean squareOn = false;
private boolean vertOn = false;
public GridPane() {
setBackground(Color.BLACK);
}
public boolean isGridOn() {
return gridOn;
}
public boolean isSquareOn(){
return squareOn;
}
public boolean isVertOn(){
return vertOn;
}
public void setGridOn(boolean value) {
if (value != gridOn) {
this.gridOn = value;
repaint();
}
}
public void setVertOn(boolean value){
if (value != vertOn){
this.vertOn = value;
repaint();
}
}
public void setSqaureOn(boolean value){
if (value != squareOn){
this.squareOn = value;
repaint();
}
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Toolkit tk = Toolkit.getDefaultToolkit();
if (gridOn) {
System.out.println("Grid works");
g.setColor(Color.white);
for (int i = 0; i < tk.getScreenSize().height; i += 64){
gridY++;
g.drawLine(0, (64 * gridY), tk.getScreenSize().width,(64 * gridY));
}
}
gridY = -1;
gridX = -1;
if (vertOn){
System.out.println("vert grid works");
g.setColor(Color.white);
for (int ig = 0; ig < tk.getScreenSize().width; ig += 64){
gridX++;
g.drawLine((64 * gridX), 0,(64 * gridX),tk.getScreenSize().height);
}
}
if (squareOn)
{
System.out.println("Square works");
g.setColor(Color.red);
g.fillRect(0,0,64,64);
}
}
}
public class DragPanel extends JPanel{
OptionPanel op = new OptionPanel();
public DragPanel(){
add(op.squareButton);
op.squareButton.setActionCommand("square");
}
public void addActionListener(ActionListener listener){
op.squareButton.addActionListener(listener);
}
}
public class OptionPanel extends JPanel {
public JButton grid;
public JButton vgrid;
public JButton squareButton;
public JTextField squareX;
public JTextField squareY;
public JTextField squareW;
public JTextField squareH;
public Square square = new Square();
public OptionPanel() {
//Sets the stuff for the panel
setBackground(new Color(155,0,255));
setLayout(new GridBagLayout());
//end
//The Show Grid Button Stuff
grid = new JButton("Show Horizontal Grid");
grid.setActionCommand("grid");
//end
//The vertical grid
vgrid = new JButton("Show Vertical Grid");
vgrid.setActionCommand("vgrid");
//end
//The Square tool button stuff
squareButton = new JButton("Sqaure Tool");
//end
squareX = new JTextField(3);
squareY = new JTextField(3);
squareW = new JTextField(3);
squareH = new JTextField(3);
//The gridbagConstraints things
GridBagConstraints gbc = new GridBagConstraints();
gbc.anchor = GridBagConstraints.NORTH;
//kind of like padding
gbc.weighty = 1;
//sets the positions
gbc.gridx = 0;
gbc.gridy = 0;
//add it
add(grid, gbc);
//changes position for the second button
gbc.gridx = -1;
gbc.gridy = 0;
// adds it
add(vgrid,gbc);
//end
add(squareX,gbc);
add(squareY,gbc);
add(squareW,gbc);
add(squareH,gbc);
}
public void addActionListener(ActionListener listener) {
//adds action listeners
grid.addActionListener(listener);
vgrid.addActionListener(listener);
}
}
不是我的反对票，但你添加的ActionListeners到组件的一个有点令人费解的方式。 – 2013-05-12 00:46:25
在'main（）'中设置'frame.setVisible（true）'_last_。 – trashgod 2013-05-12 00:47:07
有没有更好的方法，你会建议？ @ Hovercraft充满鳗鱼 – 2013-05-12 00:47:39