我正在制作一个包含50个问题的程序，因此您在文本字段中键入问题并单击按钮。如果目录中存在问题，则弹出窗口将显示答案。现在我想添加一个按钮，如果用户点击该按钮，该人就可以在其中添加他的问题和答案。添加问题很简单，但我无法弄清楚，如何添加答案。这是我的计划
class te extends JFrame implements ActionListener,MouseListener,KeyListener {
JButton bnt1;
JTextField tf;
JLabel title;
JLabel q1;
JLabel ans1;
JLabel q1f=new JLabel("Question displayed on jframe");
JButton bnt2;
JButton b;
JLabel q2;
JLabel q3;
JButton bnt3;
JButton bnt4;
JLabel q4;
JButton bnt5;
JLabel q5;
JLabel link;
ArrayList<String> items = new ArrayList<String>();
private JButton bu;
JTextField tfu;
JTextField tfu2;
JButton help;
String s;
String ss;
public te() throws Exception {
super("IskcoWare");
this.setUndecorated(true);
this.setExtendedState(MAXIMIZED_BOTH);
tf=new JTextField();
String s;
bnt4=new JButton("Ask");
bnt5=new JButton("Ask");
bnt3=new JButton("Ask");
title=new JLabel("50 Glorious Years Of Iskcon");
title.setFont(new Font("",Font.BOLD+Font.ITALIC,70));
q1.setFont(new Font("",Font.BOLD,25));
bnt1=new JButton("Ask");
bnt1.addActionListener(this);
b=new JButton("Search");
b.setBounds(700,170,150,40);
b.setFont(new Font("",Font.PLAIN,15));
b.setVisible(true);
add(b);
link=new JLabel("<html><a href=\"Something.java\">Click to add your own question</a>");
bnt2=new JButton("Ask");
help=new JButton("Help");
add(help);
help.setBounds(100,710,100,40);
setLayout(null);
tf.setBounds(150,170,450,30);
tf.setForeground(Color.GRAY);
title.setBounds(190,-150,10000,400);
q1.setBounds(100,250, 10000, 100);
bnt1.setBounds(1000,288,70,35);
bnt1.setFont(new Font("",Font.PLAIN,17));
bnt2.setFont(new Font("",Font.PLAIN,17));
bnt2.setBounds(1000,370, 70,35);
q2.setBounds(100,180,400,400);
q2.setFont(new Font("",Font.BOLD,25));
q3.setBounds(100,270,400,400);
q3.setFont(new Font("",Font.BOLD,25));
bnt3.setBounds(1000,460,70,35);
bnt3.setFont(new Font("",Font.PLAIN,17));
bnt4.setBounds(1000,550,70,35);
bnt4.setFont(new Font("",Font.PLAIN,17));
q4.setBounds(100,360,400,400);
q4.setFont(new Font("",Font.BOLD,25));
q5.setBounds(100,450,500,400);
q5.setFont(new Font("",Font.BOLD,25));
bnt5.setBounds(1000,640,70,35);
bnt5.setFont(new Font("",Font.PLAIN,17));
link.setBounds(1000,550,400,400);
link.setFont(new Font("",Font.BOLD + Font.ITALIC,15));;
add(link);
add(tf);
add(title);
add(q1);
add(bnt1);
add(tf);
add(b);
add(bnt3);
add(q3);
add(bnt2);
add(bnt4);
add(q4);
add(bnt5);
add(q5);
bnt5.addActionListener(this);
bnt2.addActionListener(this);
bnt3.addActionListener(this);
bnt4.addActionListener(this);
add(q2);
setSize(10000,730);
setVisible(true);
link.addMouseListener(this);
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
Locale[] locales = Locale.getAvailableLocales();
items.add("Questions");
tf.addMouseListener(this);
tf.setSize(400,37);
tf.addKeyListener(this);
tf.setFont(new Font("",Font.PLAIN,25));
b.addActionListener(new loginButt(tf));
b.addActionListener(this);
setupAutoComplete(tf, items);
help.addActionListener(this);
tf.setColumns(30);
tf.setText("hello");
}
private static boolean isAdjusting(JComboBox cbInput) {
cbInput.setFont(new Font("",Font.PLAIN,20));
new JScrollPane(null,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
if (cbInput.getClientProperty("is_adjusting") instanceof Boolean) {
return (Boolean) cbInput.getClientProperty("is_adjusting");
}
return false;
}
public JScrollPane createScroller()
{
return new JScrollPane(null,JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED,
JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
}
private static void setAdjusting(JComboBox cbInput, boolean adjusting) {
cbInput.putClientProperty("is_adjusting", adjusting);
}
public static void setupAutoComplete(final JTextField tf, final ArrayList<String> items) {
final DefaultComboBoxModel model = new DefaultComboBoxModel();
final JComboBox cbInput = new JComboBox(model)
//
{
public Dimension getPreferredSize() {
return new Dimension(super.getPreferredSize().width, 0);
}
};
setAdjusting(cbInput, false);
for (String item : items) {
model.addElement(item);
}
cbInput.setSelectedItem(null);
cbInput.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if (!isAdjusting(cbInput)) {
if (cbInput.getSelectedItem() != null) {
tf.setText(cbInput.getSelectedItem().toString());
}
}
}
});
tf.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
setAdjusting(cbInput, true);
//bla
if (e.getKeyCode() == KeyEvent.VK_ENTER || e.getKeyCode() == KeyEvent.VK_UP || e.getKeyCode() == KeyEvent.VK_DOWN) {
e.setSource(cbInput);
cbInput.dispatchEvent(e);
if (e.getKeyCode() == KeyEvent.VK_ENTER) {
tf.setText(cbInput.getSelectedItem().toString());
cbInput.setPopupVisible(false);
}
}
if (e.getKeyCode() == KeyEvent.VK_ESCAPE) {
cbInput.setPopupVisible(false);
}
setAdjusting(cbInput, false);
}
});
tf.getDocument().addDocumentListener(new DocumentListener() {
public void insertUpdate(DocumentEvent e) {
updateList();
}
public void removeUpdate(DocumentEvent e) {
updateList();
}
public void changedUpdate(DocumentEvent e) {
updateList();
}
private void updateList() {
setAdjusting(cbInput, true);
model.removeAllElements();
String input = tf.getText();
if (!input.isEmpty()) {
for (String item : items) {
if (item.toLowerCase().startsWith(input.toLowerCase())) {
model.addElement(item);
}
}
}
cbInput.setPopupVisible(model.getSize() > 0);
setAdjusting(cbInput, false);
}
});
tf.setLayout(new BorderLayout());
tf.add(cbInput, BorderLayout.SOUTH);
}
这是另一个班级
public class SubmitButton{
JTextField Input;
String s;
public SubmitButton(JTextField textfield){
Input = textfield;
}
public void actionPerformed(ActionEvent e) {
String q1 = "questions";
if(Input.getText().equals(q1))
{
JOptionPane.showMessageDialog(null,"The answer", "Answer",JOptionPane.WARNING_MESSAGE);
}
}
}
答案 0 :(得分：1)
简化您的问题。
您不需要所有Swing代码来解决您的子问题。
在问题的简单版本上使用命令行界面尝试，然后将其折叠到更大的代码库中。
计算机科学是关于分解的。通过将大问题分解为较小问题来解决大问题。
听起来您想要在问题列表的长度范围内生成随机数。生成索引并提出问题。