我刚刚切换到mac，我遇到了一个问题。我有一个java程序，有按钮网格，但它不显示颜色，我不能选择它们。我在Windows上尝试过但它工作得很好，我已经更新了我的mac，安装了Xcode，更新了Xcode。我在eclipse和JGrasp上尝试过它。谢谢
这是代码：
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class SafetyMapView extends JFrame {
// These are the tiles and buttons
private JPanel tiles;
private JButton[] buttons;
private JCheckBox editWallsButton;
private JCheckBox selectExitsButton;
private JButton compute;
private JButton reset;
// Menu items
private JMenuItem openItem;
private JMenuItem saveItem;
private JMenuItem exitItem;
private JMenuItem editInfoItem;
public JRadioButtonMenuItem showdistance;
public JButton getFloorTileButton(int i) { return buttons[i]; }
public JPanel getTilePanel() { return tiles; }
public JCheckBox getEditWallsButton() { return editWallsButton; }
public JCheckBox getSelectExitsButton() { return selectExitsButton; }
//public JRadioButtonMenuItem getShowDistance(){return showdistance;}
public JButton getCompute(){return compute;}
public JButton getReset(){return reset;}
// Methods for adding listeners to the open/save/distance options
public void setOpenHandler(ActionListener x) {
openItem.addActionListener(x); }
public void setSaveHandler(ActionListener x) {
saveItem.addActionListener(x); }
public void setEditInfoHandler(ActionListener x) {
editInfoItem.addActionListener(x); }
// This constructor builds the panel
public SafetyMapView(String title, FloorPlan floorPlan) {
super(title);
// Create the panel with the floor tiles on it
createFloorPlanPanel(floorPlan);
// Layout the rest of the window's components
setupComponents();
addMenus();
setDefaultCloseOperation(EXIT_ON_CLOSE);
setSize(600, 500);
setVisible(true);
}
// Create the panel to contain the buttons that display the floor plan
private void createFloorPlanPanel(FloorPlan floorPlan) {
// Setup the panel with the buttons
buttons = new JButton[floorPlan.size()*floorPlan.size()];
tiles = new JPanel();
tiles.setLayout(new GridLayout(floorPlan.size(),floorPlan.size()));
// Add the buttons to the tile panel
for (int r=0; r<floorPlan.size(); r++) {
for (int c=0; c<floorPlan.size(); c++) {
int i = r * floorPlan.size() + c;
buttons[i] = new JButton();
buttons[i].setBorder(BorderFactory.createLineBorder(Color.lightGray));
buttons[i].setBackground(Color.white);
tiles.add(buttons[i]);
}
}
}
// Here we add all the components to the window accordingly
private void setupComponents() {
// Layout the components using a gridbag
GridBagLayout layout = new GridBagLayout();
GridBagConstraints layoutConstraints = new GridBagConstraints();
getContentPane().setLayout(layout);
// Add the tiles
layoutConstraints.gridx = 0; layoutConstraints.gridy = 0;
layoutConstraints.gridwidth = 1; layoutConstraints.gridheight = 6;
layoutConstraints.fill = GridBagConstraints.BOTH;
layoutConstraints.insets = new Insets(2, 2, 2, 2);
layoutConstraints.anchor = GridBagConstraints.NORTHWEST;
layoutConstraints.weightx = 1.0; layoutConstraints.weighty = 1.0;
layout.setConstraints(tiles, layoutConstraints);
getContentPane().add(tiles);
JLabel aLabel = new JLabel("MODE:");
layoutConstraints.gridx = 1; layoutConstraints.gridy = 0;
layoutConstraints.gridwidth = 1; layoutConstraints.gridheight = 1;
layoutConstraints.fill = GridBagConstraints.NONE;
layoutConstraints.insets = new Insets(2, 2, 2, 2);
layoutConstraints.anchor = GridBagConstraints.NORTHWEST;
layoutConstraints.weightx = 0.0; layoutConstraints.weighty = 0.0;
layout.setConstraints(aLabel, layoutConstraints);
getContentPane().add(aLabel);
JLabel bLabel = new JLabel("ComPutE:");
layoutConstraints.gridx = 1; layoutConstraints.gridy = 3;
layoutConstraints.gridwidth = 1; layoutConstraints.gridheight = 1;
layoutConstraints.fill = GridBagConstraints.NONE;
layoutConstraints.insets = new Insets(2, 2, 2, 2);
layoutConstraints.anchor = GridBagConstraints.WEST;
layoutConstraints.weightx = 0.0; layoutConstraints.weighty = 0.0;
layout.setConstraints(bLabel, layoutConstraints);
getContentPane().add(bLabel);
// Add the EditWalls button
editWallsButton = new JCheckBox("Edit Walls");
layoutConstraints.gridx = 1; layoutConstraints.gridy = 1;
layoutConstraints.gridwidth = 1; layoutConstraints.gridheight = 1;
layoutConstraints.fill = GridBagConstraints.BOTH;
layoutConstraints.insets = new Insets(2, 2, 2, 2);
layoutConstraints.anchor = GridBagConstraints.CENTER;
layoutConstraints.weightx = 0.0; layoutConstraints.weighty = 0.0;
layout.setConstraints(editWallsButton, layoutConstraints);
getContentPane().add(editWallsButton);
// Add the SelectExits button
selectExitsButton = new JCheckBox("Select Exits");
layoutConstraints.gridx = 1; layoutConstraints.gridy = 2;
layoutConstraints.gridwidth = 1; layoutConstraints.gridheight = 1;
layoutConstraints.fill = GridBagConstraints.BOTH;
layoutConstraints.insets = new Insets(2, 2, 2, 2);
layoutConstraints.anchor = GridBagConstraints.CENTER;
layoutConstraints.weightx = 0.0; layoutConstraints.weighty = 0.0;
layout.setConstraints(selectExitsButton, layoutConstraints);
getContentPane().add(selectExitsButton);
compute = new JButton("compute safety plan");
layoutConstraints.gridx = 1; layoutConstraints.gridy = 4;
layoutConstraints.gridwidth = 1; layoutConstraints.gridheight = 1;
layoutConstraints.fill = GridBagConstraints.BOTH;
layoutConstraints.insets = new Insets(2, 2, 2, 2);
layoutConstraints.anchor = GridBagConstraints.CENTER;
layoutConstraints.weightx = 0.0; layoutConstraints.weighty = 0.0;
layout.setConstraints(compute, layoutConstraints);
getContentPane().add(compute);
reset = new JButton("reset safety plan");
layoutConstraints.gridx = 1; layoutConstraints.gridy = 5;
layoutConstraints.gridwidth = 1; layoutConstraints.gridheight = 1;
layoutConstraints.fill = GridBagConstraints.NORTH;
layoutConstraints.insets = new Insets(2, 2, 2, 2);
layoutConstraints.anchor = GridBagConstraints.CENTER;
layoutConstraints.weightx = 0.0; layoutConstraints.weighty = 0.0;
layout.setConstraints(reset, layoutConstraints);
getContentPane().add(reset);
}
private void addMenus() {
JMenuBar menubar = new JMenuBar();
setJMenuBar(menubar);
// Make the file menu
JMenu file = new JMenu("File");
file.setMnemonic('F');
menubar.add(file);
openItem = new JMenuItem("Open Floor Plan");
saveItem = new JMenuItem("Save Floor Plan");
exitItem = new JMenuItem("Quit");
openItem.setMnemonic('O');
saveItem.setMnemonic('S');
exitItem.setMnemonic('Q');
file.add(openItem);
file.add(saveItem);
file.add(exitItem);
exitItem.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.exit(0);
}});
// Make the options menu
JMenu view = new JMenu("Options");
view.setMnemonic('O');
menubar.add(view);
JMenu edit = new JMenu("Exits");
edit.setMnemonic('E');
view.add(edit);
editInfoItem = new JMenuItem("Edit Info");
editInfoItem.setMnemonic('E');
edit.add(editInfoItem);
showdistance = new JRadioButtonMenuItem("show Distance");
showdistance.setMnemonic('D');
view.add(showdistance);
}
public static void main(String args[]) {
new SafetyMapView("Fire Safety Routes", FloorPlan.example1());
}
}
答案 0 :(得分：1)
Mac Look＆amp; Feel覆盖了一些默认设置。您可以尝试切换到不同的外观和感觉。