你好，这是我的主要课程。如果我单击按钮，示例。 EASY按钮，它将出现另一种我循环进入的形式。无论如何，这是一个标志测验。如果循环达到9以上（currentItem> 9）看到下一个代码，它将再次设置主类，它具有EASY按钮，现在我的问题是，如何禁用EASY按钮一旦我完成循环？
package rebuzz;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Rebuzz extends JFrame implements ActionListener
{
public static void main (String args [])
{
new Rebuzz().setVisible(true);
}
public Rebuzz()
{
super("sample");
setSize(400,300);
setResizable(false);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setLocationRelativeTo(null);
Menu();
}
/*private void Easy()
{
JButton next = new JButton("Next");
setLayout(new FlowLayout(1,200,25));
next.addActionListener(this);
JLabel pic = new JLabel();
pic.setIcon(new ImageIcon("1easy.gif"));
add(pic);
add(answer);
add(next);
}*/
public void Menu()
{
easyButton = new JButton("easy");//EASY BUTTON
easyButton.setActionCommand("easy");
setLayout(new FlowLayout(1,200,25));
easyButton.addActionListener(this);
mediumButton = new JButton ("Medium");//MEDIUM BUTTON
mediumButton.setActionCommand("medium");
setLayout(new FlowLayout(1,200,25));
mediumButton.addActionListener(this);
insaneButton = new JButton ("Insane");//INSANE BUTTON
insaneButton.setActionCommand("insane");
setLayout(new FlowLayout(1,200,25));
insaneButton.addActionListener(this);
add(easyButton);
add(mediumButton);
add(insaneButton);
}
@Override
public void actionPerformed(ActionEvent e)
{
String open = e.getActionCommand();
if (open.equals("easy"))
{
Easy easy = new Easy();
this.setVisible(false);
easy.setVisible(true);
}
else if (open.equals("medium"))
{
Medium medium = new Medium();
this.setVisible(false);
medium.setVisible(true);
}
else if (open.equals("insane"))
{
Insane insane = new Insane();
this.setVisible(false);
insane.setVisible(true);
}
}
}
这是我的EASY课程
package rebuzz;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
public class Easy extends JFrame implements ActionListener
{
JLabel[] img = new JLabel[11];
JTextField[] answer = new JTextField[11];
String[] rightAnswer = {"cross breed", "forgive and forget", "side show", "big brother", "cross roads", "quite right", "small talk", "too little too late", "see for yourself", "once in a blue moon"};
ImageIcon[] easy = new ImageIcon[rightAnswer.length];
//int currentItem=0;
int currentItem;
JLabel imageContainer;
JTextField answerContainer;
JButton submit;
JButton home;
JButton back;
String ans;
private String[] args;
//private String[] frame;
public Easy()
{
super("Easy Sample");
setSize(300,400);
setResizable(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setLocationRelativeTo(null);
Easy1();
}
public void Easy1()
{
imageContainer = new JLabel();
for(int x = 0; x < rightAnswer.length ; x++)
{
System.out.println(Integer.toString(x));//loop output
easy[x] = new ImageIcon((x+1)+"easy.gif");
}
//JPanel jpanel = new JPanel();
answerContainer = new JTextField(null, 10);
currentItem = 0;
imageContainer.setIcon(easy[currentItem]);
ans = rightAnswer[currentItem];
submit = new JButton("Submit");
home = new JButton("Home");
submit.addActionListener(new java.awt.event.ActionListener()
{
public void actionPerformed(java.awt.event.ActionEvent evt)
{
submitActionPerformed(evt);
}
});
home.addActionListener(new java.awt.event.ActionListener()
{
public void actionPerformed(java.awt.event.ActionEvent evt)
{
homeActionPerformed(evt);
}
});
back.addActionListener(new java.awt.event.ActionListener()
{
public void actionPerformed(java.awt.event.ActionEvent evt)
{
backActionPerformed(evt);
}
});
setLayout(new FlowLayout(1,20,10));
add(imageContainer);
add(answerContainer);
add(submit);
add(home);
}
@Override
public void actionPerformed(ActionEvent e)
{
}
private void submitActionPerformed(java.awt.event.ActionEvent evt)
{
if (answerContainer.getText().equalsIgnoreCase(ans))
{
if (currentItem < 9)
{
JOptionPane.showMessageDialog(null, "No."+(currentItem+1)+" Easy Puzzle is correct!","Great!",JOptionPane.PLAIN_MESSAGE);
currentItem++;
imageContainer.setIcon(easy[currentItem]);
ans = rightAnswer[currentItem];
answerContainer.setText("");
}
else
{
JOptionPane.showMessageDialog(null,"Done!");
this.setVisible(false);
Rebuzz.main(args);
Rebuzz rebuzz = new Rebuzz();
rebuzz.easy = false;
}
}
else if (answerContainer.getText().equals(""))
{
JOptionPane.showMessageDialog(null,"Please enter your answer.","Errrr",JOptionPane.ERROR_MESSAGE);
}
else
{
JOptionPane.showMessageDialog(null, "Incorrect Answer!");
answerContainer.setText("");
}
}
}
private void homeActionPerformed(ActionEvent evt)
{
Rebuzz.main(args);
this.setVisible(false);
}
}
答案 0 :(得分：2)
禁用按钮很简单 - 您只需致电myButton.setEnabled(true)，但这不是您的问题所在。相反，你的问题，最简单的本质，是：
如何根据B类状态的变化（currentItem的值＆gt; 9）更改A类的状态（按钮是否启用）
我看到了两种方法之一：
我自己，我最喜欢第二条路线，因为这样可以让B级在没有任何关于A类的知识的情况下沿着它的方式行进，而这样做的一个好方法就是让A类为B类添加一个监听器。财产状态发生变化时通知。我将研究使用PropertyChangeListener。 B可以创建一个方法setCurrentItem(int currentItem)并在其中通知其属性更改支持，这将通知所有侦听器currentItem已更改。它还需要一个int getCurrentItem()方法，以便A可以查询B的状态。
例如：
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.*;
public class WatchState extends JPanel {
private A a = new A();
private B b = new B(a);
public WatchState() {
setLayout(new BorderLayout());
add(a);
add(b, BorderLayout.PAGE_END);
}
private static void createAndShowGui() {
WatchState mainPanel = new WatchState();
JFrame frame = new JFrame("WatchState");
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.getContentPane().add(mainPanel);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}
class A extends JPanel {
// a String for the property name
public static final String CURRENT_ITEM = "current item";
private int currentItem = 0;
public A() {
add(new JButton(new AbstractAction("Press Me to Advance Current Item") {
@Override
public void actionPerformed(ActionEvent arg0) {
int temp = getCurrentItem();
temp++;
setCurrentItem(temp);
}
}));
setBorder(BorderFactory.createTitledBorder("Class A"));
}
public int getCurrentItem() {
return currentItem;
}
public void setCurrentItem(int currentItem) {
int oldValue = this.currentItem;
int newValue = currentItem;
this.currentItem = currentItem;
firePropertyChange(CURRENT_ITEM, oldValue, newValue);
}
}
class B extends JPanel {
public static final int MAX_CURRENT_ITEM = 9;
private A a;
private JLabel currentItemStateLabel = new JLabel("00");
private JButton someButton = new JButton("Some Button");
public B(A a) {
this.a = a;
a.addPropertyChangeListener(A.CURRENT_ITEM, new CurrentItemListener());
add(someButton);
add(new JLabel("Current Item: "));
add(currentItemStateLabel);
setBorder(BorderFactory.createTitledBorder("Class B"));
}
private class CurrentItemListener implements PropertyChangeListener {
@Override
public void propertyChange(PropertyChangeEvent evt) {
int newValue = (int) evt.getNewValue();
currentItemStateLabel.setText(String.format("%02d", newValue));
if (newValue > MAX_CURRENT_ITEM) {
someButton.setEnabled(false);
}
}
}
}
答案 1 :(得分：0)
使全局变量代表您的游戏状态（其中三个），即boolean game_state_easy = false;
例如：
if (open.equals("easy"))
{
Easy easy = new Easy();
this.setVisible(false);
easy.setVisible(true);
game_state_easy = true;
}
然后在你的菜单中：
easyButton = new JButton("easy");//EASY BUTTON
easyButton.setActionCommand("easy");
setLayout(new FlowLayout(1,200,25));
easyButton.addActionListener(this);
if (game_state_easy){
//disable the button
}