我使用了 Hovercraft Full Of Eels 中的代码并对其进行了一些操作以获得我想要的编号。现在看起来不错，我可以读取状态，但我无法弄清楚如何使用表单上的按钮来操作各个复选框。有人可以帮忙吗？
package and.lotto;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.*;
@SuppressWarnings("serial")
public class NewLotto extends JPanel {
public static final int GRID_PANEL_ROWS = 3;
public static final int GRID_PANEL_COLS = 4;
public static final int PANELS = 12;
public static final int BOXES = 12;
private static final int GAP = 1;
private CheckBoxGrid[] checkBoxGrid = new CheckBoxGrid[PANELS];
public NewLotto() {
setLayout(new GridLayout(GRID_PANEL_ROWS, GRID_PANEL_COLS, GAP, GAP));
for (int rows = 0; rows < BOXES; rows++) {
checkBoxGrid[rows] = new CheckBoxGrid(rows,0);
add(checkBoxGrid[rows]);
}
}
private static void createAndShowGui() {
NewLotto mainPanel = new NewLotto();
ButtonPanel buttons = new ButtonPanel();
JFrame frame = new JFrame("Lotto");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(buttons,BorderLayout.NORTH);
frame.add(mainPanel, BorderLayout.SOUTH);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}
@SuppressWarnings("serial")
class ButtonPanel extends JPanel {
JButton generate;
JButton clear;
private ActionListener actionListener = new MyButtonListener();
public ButtonPanel(){
generate = new JButton("Generate numbers");
generate.addActionListener(actionListener);
clear = new JButton("Clear All");
clear.addActionListener(actionListener);
add(generate);
add(clear);
}
private class MyButtonListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
System.out.println("Testing");
}
}
}
@SuppressWarnings("serial")
class CheckBoxGrid extends JPanel {
private static final int CHECK_BOXES = 35;
private static final int CHECK_BOX_COLS = 6;
private static final int CHECK_BOX_ROWS = 6;
private static final int GAP = -5;
private JCheckBox[] checkBoxes = new JCheckBox[CHECK_BOXES];
private int gridIndex;
private ItemListener itemListener = new MyCheckBoxListener();
private int row;
private int col;
public CheckBoxGrid(int row, int col) {
this.row = row;
this.col = col;
gridIndex = row + col + 1;
setBorder(BorderFactory.createTitledBorder(String.valueOf(gridIndex)));
setLayout(new GridLayout(CHECK_BOX_ROWS, CHECK_BOX_COLS, GAP, GAP));
for (int cbRow = 0; cbRow < checkBoxes.length; cbRow++) {
JCheckBox checkBox = new JCheckBox();
checkBox.addItemListener(itemListener);
add(checkBox);
checkBox.setRolloverEnabled(false);
checkBox.setRequestFocusEnabled(false);
checkBoxes[cbRow] = checkBox;
}
checkBoxes[0].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red01.png")));
checkBoxes[0].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red01sel.png")));
checkBoxes[1].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red02.png")));
checkBoxes[1].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red02sel.png")));
checkBoxes[2].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red03.png")));
checkBoxes[2].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red03sel.png")));
checkBoxes[3].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red04.png")));
checkBoxes[3].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red04sel.png")));
checkBoxes[4].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red05.png")));
checkBoxes[4].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red05sel.png")));
checkBoxes[5].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red06.png")));
checkBoxes[5].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red06sel.png")));
checkBoxes[6].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red07.png")));
checkBoxes[6].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red07sel.png")));
checkBoxes[7].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red08.png")));
checkBoxes[7].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red08sel.png")));
checkBoxes[8].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red09.png")));
checkBoxes[8].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red09sel.png")));
checkBoxes[9].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red10.png")));
checkBoxes[9].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red10sel.png")));
checkBoxes[10].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red11.png")));
checkBoxes[10].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red11sel.png")));
checkBoxes[11].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red12.png")));
checkBoxes[11].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red12sel.png")));
checkBoxes[12].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red13.png")));
checkBoxes[12].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red13sel.png")));
checkBoxes[13].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red14.png")));
checkBoxes[13].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red14sel.png")));
checkBoxes[14].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red15.png")));
checkBoxes[14].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red15sel.png")));
checkBoxes[15].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red16.png")));
checkBoxes[15].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red16sel.png")));
checkBoxes[16].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red17.png")));
checkBoxes[16].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red17sel.png")));
checkBoxes[17].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red18.png")));
checkBoxes[17].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red18sel.png")));
checkBoxes[18].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red19.png")));
checkBoxes[18].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red19sel.png")));
checkBoxes[19].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red20.png")));
checkBoxes[19].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red20sel.png")));
checkBoxes[20].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red21.png")));
checkBoxes[20].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red21sel.png")));
checkBoxes[21].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red22.png")));
checkBoxes[21].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red22sel.png")));
checkBoxes[22].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red23.png")));
checkBoxes[22].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red23sel.png")));
checkBoxes[23].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red24.png")));
checkBoxes[23].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red24sel.png")));
checkBoxes[24].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red25.png")));
checkBoxes[24].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red25sel.png")));
checkBoxes[25].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red26.png")));
checkBoxes[25].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red26sel.png")));
checkBoxes[26].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red27.png")));
checkBoxes[26].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red27sel.png")));
checkBoxes[27].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red28.png")));
checkBoxes[27].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red28sel.png")));
checkBoxes[28].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red29.png")));
checkBoxes[28].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red29sel.png")));
checkBoxes[29].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red30.png")));
checkBoxes[29].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red30sel.png")));
checkBoxes[30].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red31.png")));
checkBoxes[30].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red31sel.png")));
checkBoxes[31].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red32.png")));
checkBoxes[31].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red32sel.png")));
checkBoxes[32].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red33.png")));
checkBoxes[32].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red33sel.png")));
checkBoxes[33].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red34.png")));
checkBoxes[33].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red34sel.png")));
checkBoxes[34].setIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red35.png")));
checkBoxes[34].setSelectedIcon(new ImageIcon(NewLotto.class.getResource("/and/lotto/img/red35sel.png")));
}
private class MyCheckBoxListener implements ItemListener {
@Override
public void itemStateChanged(ItemEvent itemEvt) {
JCheckBox source = (JCheckBox) itemEvt.getSource();
boolean selected = source.isSelected();
int cbRow = -1;
for (int r = 0; r < checkBoxes.length; r++) {
if (source.equals(checkBoxes[r])) {
cbRow = r;
}
}
String text = String.format("Grid %d, selected: %b, at %d",
(row + col + 1), selected, cbRow);
System.out.println(text);
}
}
}
这是原始问题:
我正在尝试创建一个包含 12 个 JPanel 数组的布局，每个 JPanel 包含一个包含 35 个 JCheckbox 的数组。我遇到的问题是，尽管面板和复选框在表单上都显示良好，但我无法访问各个复选框的属性。 这是我使用的部分代码:
JPanel panel_south = new JPanel();
contentPane.add(panel_south, BorderLayout.SOUTH);
panel_south.setLayout(new GridLayout(3, 4, 1, 1));
for(Integer i =0; i<12;i++){
Integer title = i+1;
EtchedBorder border = new EtchedBorder(EtchedBorder.LOWERED, null, null);
TitledBorder titled = new TitledBorder(border,title.toString());
row[i] = new JPanel();
row[i].setBorder(titled);
row[i].setLayout(new GridLayout(6, 6, -6, -5));
panel_south.add(row[i]);
JCheckBox[] rad = new JCheckBox[35];
for (int j = 0;j<35;j++){
rad[j] = new JCheckBox();
row[i].add(rad[j]);
}
当我尝试在 for 循环中使用这样的一行时:
行[i].rad[j].setSelected(真);
我收到错误:无法解析 rad 我在这里做错了什么？
最佳答案
您应该重构包含 JTextFields 网格的 JPanel，为此创建一个单独的类，该类接受一个数字作为其索引，并包含 JCheckBox 网格或 JTable。
例如，
import java.awt.GridLayout;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.*;
@SuppressWarnings("serial")
public class CheckBoxGridMain extends JPanel {
public static final int GRID_PANEL_ROWS = 3;
public static final int GRID_PANEL_COLS = 4;
private static final int GAP = 1;
private CheckBoxGrid[][] checkBoxGrid = new CheckBoxGrid[GRID_PANEL_ROWS][GRID_PANEL_COLS];
public CheckBoxGridMain() {
setLayout(new GridLayout(GRID_PANEL_ROWS, GRID_PANEL_COLS, GAP, GAP));
for (int row = 0; row < checkBoxGrid.length; row++) {
for (int col = 0; col < checkBoxGrid[row].length; col++) {
checkBoxGrid[row][col] = new CheckBoxGrid(row, col);
add(checkBoxGrid[row][col]);
}
}
}
private static void createAndShowGui() {
CheckBoxGridMain mainPanel = new CheckBoxGridMain();
JFrame frame = new JFrame("CheckBox Grid");
frame.setDefaultCloseOperation(JFrame.EXIT_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();
}
});
}
}
@SuppressWarnings("serial")
class CheckBoxGrid extends JPanel {
private static final int CHECK_BOX_ROWS = 6;
private static final int CHECK_BOX_COLS = 6;
private static final int GAP = -5;
private JCheckBox[][] checkBoxes = new JCheckBox[CHECK_BOX_ROWS][CHECK_BOX_COLS];
private int gridIndex;
private ItemListener itemListener = new MyCheckBoxListener();
private int row;
private int col;
public CheckBoxGrid(int row, int col) {
this.row = row;
this.col = col;
gridIndex = row + col + 1;
setBorder(BorderFactory.createTitledBorder(String.valueOf(gridIndex)));
setLayout(new GridLayout(CHECK_BOX_ROWS, CHECK_BOX_COLS, GAP, GAP));
for (int cbRow = 0; cbRow < checkBoxes.length; cbRow++) {
for (int cbCol = 0; cbCol < checkBoxes[cbRow].length; cbCol++) {
JCheckBox checkBox = new JCheckBox();
checkBox.addItemListener(itemListener);
add(checkBox);
checkBoxes[cbRow][cbCol] = checkBox;
}
}
}
private class MyCheckBoxListener implements ItemListener {
@Override
public void itemStateChanged(ItemEvent itemEvt) {
JCheckBox source = (JCheckBox) itemEvt.getSource();
boolean selected = source.isSelected();
int cbRow = -1;
int cbCol = -1;
for (int r = 0; r < checkBoxes.length; r++) {
for (int c = 0; c < checkBoxes[r].length; c++) {
if (source.equals(checkBoxes[r][c])) {
cbRow = r;
cbCol = c;
}
}
}
String text = String.format("Grid %d, selected: %b, at [%d, %d]",
(row + col + 1), selected, cbCol, cbRow); // corrected row/col order
System.out.println(text);
}
}
}
显示
关于java - 如何在 JPanel 数组中使用 JCheckbox 数组，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/15732194/