好的，容器加载所有JPanels，问题是在容器从clues（）方法加载selectedItemIndex（）之后，我无法更改selectedItemIndex（）以显示自容器以来的不同线索列表从一开始就加载所有内容。
我可以做什么，以便我可以从JCombobox中选择不同的项目索引，并让它们出现在包含JLists的JPanel中？
我需要做一些刷新吗？
package crucigramaprograi;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.BorderFactory;
import static javax.swing.BorderFactory.createTitledBorder;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.TitledBorder;
public class Main extends JFrame implements MouseListener {
Container container;
public Main(){
super("Crucigrama");
container = getContentPane();
container.setLayout(new BorderLayout(1, 1));
container.add(login(),BorderLayout.NORTH);
container.add(buttons(),BorderLayout.WEST);
container.add(clues(),BorderLayout.SOUTH);
container.add(createMatrix(crosswordPanel()),BorderLayout.CENTER);
container.add(eastPanel(),BorderLayout.EAST);
}
public JPanel login(){
JPanel loginPanel = new JPanel();
loginPanel.setLayout(new FlowLayout(1, 15, 50));
loginPanel.setVisible(true);
JTextField inputUserName = new JTextField(15);
inputUserName.setPreferredSize(new Dimension(25, 25));
inputUserName.setToolTipText("Ingrese su nombre para poder jugar");
loginPanel.add(inputUserName);
JButton btnEnter = new JButton("Jugar!");
btnEnter.setPreferredSize(new Dimension(80,25));
loginPanel.add(btnEnter);
return loginPanel;
}
public JPanel buttons(){
JPanel buttonsPanel = new JPanel();
buttonsPanel.setLayout(new FlowLayout(5, 45, 15));
buttonsPanel.setPreferredSize(new Dimension(250, 200));
buttonsPanel.setVisible(true);
final String categories[] = {"Animales", "Capitales del Mundo", "El Clima"};
JComboBox crosswordCategories = new JComboBox(categories);
crosswordCategories.setPreferredSize(new Dimension(150,20));
buttonsPanel.add(crosswordCategories);
JButton newGame = new JButton("Nuevo Juego");
newGame.setPreferredSize(new Dimension(130,27));
newGame.setFont(new Font("Tahoma", Font.PLAIN, 11));
buttonsPanel.add(newGame);
JButton showChar = new JButton("Revelar letra");
showChar.setPreferredSize(new Dimension(130,27));
showChar.setFont(new Font("Tahoma", Font.PLAIN, 11));
buttonsPanel.add(showChar);
JButton showWord = new JButton("Revelar palabra");
showWord.setPreferredSize(new Dimension(130,27));
showWord.setFont(new Font("Tahoma", Font.PLAIN, 11));
buttonsPanel.add(showWord);
JButton verifyWord = new JButton("Verificar palabra");
verifyWord.setPreferredSize(new Dimension(130,27));
verifyWord.setFont(new Font("Tahoma", Font.PLAIN, 11));
buttonsPanel.add(verifyWord);
JButton revealAll = new JButton("Solución");
revealAll.setPreferredSize(new Dimension(130,27));
revealAll.setFont(new Font("Tahoma", Font.PLAIN, 11));
buttonsPanel.add(revealAll);
JLabel labelScore = new JLabel("Puntuación:");
labelScore.setFont(new Font("Arial", Font.BOLD, 13));
buttonsPanel.add(labelScore);
return buttonsPanel;
}
public JPanel clues(){
JPanel clues = new JPanel();
clues.setLayout(new FlowLayout(3, 1, 1));
clues.setPreferredSize(new Dimension(200, 185));
clues.setVisible(true);
JList horizontalList = new JList(new Object[]{"ghdfghdfgh","dfhsdghsfgh"});
//horizontalList.setLayout(new FlowLayout());
//horizontalList.setPreferredSize(new Dimension(635, 180));
horizontalList.setBorder(createTitledBorder(null, "Pistas Horizontales",TitledBorder.DEFAULT_JUSTIFICATION, TitledBorder.DEFAULT_POSITION, null, Color.black));
clues.add(horizontalList,BorderLayout.CENTER);
JList verticalList = new JList(new Object[]{"bnmvbnmbnm","wertertert"});
//verticalList.setLayout(new FlowLayout());
//verticalList.setPreferredSize(new Dimension(635, 180));
verticalList.setBorder(createTitledBorder(null, "Pistas Verticales",TitledBorder.DEFAULT_JUSTIFICATION, TitledBorder.DEFAULT_POSITION, null, Color.black));
clues.add(verticalList,BorderLayout.CENTER);
return clues;
}
public JPanel eastPanel(){
JPanel fill = new JPanel();
fill.setLayout(new FlowLayout(5, 25, 15));
fill.setPreferredSize(new Dimension(50, 200));
fill.setVisible(true);
return fill;
}
public JPanel crosswordPanel(){
JPanel crosswordPanel = new JPanel();
crosswordPanel.setLayout(new GridLayout(10,10,0,0));
crosswordPanel.setVisible(true);
return crosswordPanel;
}
public JPanel createMatrix(JPanel crosswordPanel){
JPanel crosswordMatrix [][] = new JPanel [10][10];
for (int i = 0; i < crosswordMatrix.length ; i++) {
for (int j = 0; j < crosswordMatrix[0].length; j++) {
crosswordMatrix[i][j] = new JPanel();
crosswordMatrix[i][j].setBackground(Color.black);
crosswordMatrix[i][j].setBorder(BorderFactory.createLineBorder(Color.black, 1));
crosswordMatrix[i][j].addMouseListener(this);
crosswordPanel.add(crosswordMatrix[i][j]);
}
}
return crosswordPanel;
}
public static void main(String[] args) {
Main guiWindow = new Main();
/*Sets window size according to the computer resolution.
Window size is not hardcoded.*/
Toolkit screenSize = Toolkit.getDefaultToolkit();
int width = screenSize.getScreenSize().width * 4/5;
int height = screenSize.getScreenSize().height * 4/5;
guiWindow.setSize(width, height);
guiWindow.setLocationRelativeTo(null);
//guiWindow.setResizable(false);
guiWindow.setVisible(true);
guiWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static String[] getVerticalClues(int category) {
String verticalClues[] = new String[6];
switch (category) {
case 1:
verticalClues[0] = "1. Mamífero acuático muy inteligente y simpático";
verticalClues[1] = "2. Muy grande con colmillos, orejas enormes y trompa";
verticalClues[2] = "3. Felino pintado a rayas, muy feroz";
verticalClues[3] = "4. Es el animal con el cuello más largo";
verticalClues[4] = "5. Al trote o al galope era el medio de transporte de indios y vaqueros";
verticalClues[5] = "6. Como lleva un caparazón muy pesado, siempre va muy despacio";
break;
case 2:
verticalClues[0] = "1. Los cristianos se refugiaban en…";
verticalClues[1] = "2. Religión que en un principio fue perseguida pero después paso a ser la religión oficial del imperio romano";
verticalClues[2] = "3. Era la moneda Romana";
verticalClues[3] = "4. Era la principal actividad económica Romana";
verticalClues[4] = "5. Nombre de la lengua del Imperio Romano";
verticalClues[5] = "6. Nombre del principal dios romano en la época pre cristiana";
break;
case 3:
verticalClues[0] = "1. Océano que baña a Islandia";
verticalClues[1] = "2. País por el que pasa el rio Elba";
verticalClues[2] = "3. Capital del país situado a la derecha de Suecia";
verticalClues[3] = "4. País cuya capital es Zagreb";
verticalClues[4] = "5. Rio que divide a Rusia en 2 mitades";
verticalClues[5] = "6. Capital del país que se encuentra entre Venezuela y Ecuador";
break;
}
return verticalClues;
}
public static String[] getHorizontalClues(int category) {
String horizontalClues[] = new String[6];
switch (category) {
case 1:
horizontalClues[0] = "1. Tiene bigotes y siete vidas";
horizontalClues[1] = "2. Oso grande, blanco y negro y es originario de Asia";
horizontalClues[2] = "3. Tiene alas grandes, coloridas y sale de un capullo";
horizontalClues[3] = "4. Dicen que es el mejor amigo del hombre";
horizontalClues[4] = "5. El rey de la selva, con melena larga";
horizontalClues[5] = "6. Vive en el agua y tiene una boca larga y llena de dientes";
break;
case 2:
horizontalClues[0] = "1. Emperador que concedió la libertad religiosa a los cristianos";
horizontalClues[1] = "2. Nombre que recibe el conjunto de leyes romanas";
horizontalClues[2] = "3. El español, francés, portugués, catalán, italiano y rumano se derivaron del…";
horizontalClues[3] = "4. El culto domestico era dirigido por el…";
horizontalClues[4] = "5. La arquitectura y escultura romana fue influenciada por la cultura…";
horizontalClues[5] = "6. El descenso de la producción agrícola es una causa…";
break;
case 3:
horizontalClues[0] = "1. Montes que están entre Francia, Suiza e Italia";
horizontalClues[1] = "2. País cuya capital es Bagdad";
horizontalClues[2] = "3. País que está a la par de Haití";
horizontalClues[3] = "4. Tercer isla más grande del mundo";
horizontalClues[4] = "5. Cabo en la península de Somalia";
horizontalClues[5] = "6. Capital de Bolivia";
break;
}
return horizontalClues;
}
//@Override
public void mouseClicked(MouseEvent e) {
}
@Override
public void mousePressed(MouseEvent e) {
}
@Override
public void mouseReleased(MouseEvent e) {
}
@Override
public void mouseEntered(MouseEvent e) {
}
@Override
public void mouseExited(MouseEvent e) {
}
}
对不起大码。
答案 0 :(得分：1)
下面我已经创建了一个小示例程序供您用作指南。
三个要点是：
提供所需的组件类范围。正如您在我的示例中所看到的，myComboBox和myList被声明为具有类范围。我也在类范围内有列表模型（myListModel），只是为了方便使用。
在你的组合框上实现一个监听器。这意味着代码将在相应事件发生时运行。我碰巧使用ItemListener，但您也可以使用ActionListener。 This question也实现了两者。
为ListModel使用JLists，然后您只需更改模型中的项目，列表就会处理这些更改。
有关更多信息，请查看以下有用链接：
import javax.swing.BorderFactory;
import javax.swing.DefaultListModel;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;
import javax.swing.WindowConstants;
import java.awt.BorderLayout;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
/**
* SelectionExample
*/
public class SelectionExample extends JFrame
{
// ------ Point 1 --------- //
private DefaultListModel<String> myListModel;
private JComboBox<String> myComboBox;
private JList<String> myList;
public SelectionExample()
{
super("An Example");
initComponents();
}
private void initComponents()
{
JPanel jp = new JPanel(new BorderLayout(5,5));
jp.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
myComboBox = new JComboBox<String>(new String[]{"Numbers", "Letters", "Punctuation"});
// ------ Point 2 --------- //
myComboBox.addItemListener(new ItemListener()
{
@Override
public void itemStateChanged(ItemEvent e)
{
if(e.getStateChange() == ItemEvent.SELECTED)
{
String[] jListItems = getItemsForSelection(myComboBox.getSelectedIndex());
// ------ Point 3 --------- //
myListModel.removeAllElements();
for(String s : jListItems)
myListModel.addElement(s);
}
}
});
jp.add(myComboBox, BorderLayout.NORTH);
myListModel = new DefaultListModel<String>();
myList = new JList<String>(myListModel);
JScrollPane jsp = new JScrollPane();
jsp.add(myList);
jsp.setViewportView(myList);
jp.add(jsp, BorderLayout.CENTER);
add(jp);
pack();
}
private String[] getItemsForSelection(int selection)
{
switch(selection)
{
case 0:
return new String[]{"1","2","3","4","5"};
case 1:
return new String[]{"A","B","C","D","E"};
case 2:
return new String[]{"!","@","#","$","%"};
default:
return null;
}
}
public static void main(String[] args)
{
SwingUtilities.invokeLater(new Runnable()
{
@Override
public void run()
{
SelectionExample se = new SelectionExample();
se.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
se.setVisible(true);
}
});
}
}