在我解释我的问题之前，我想展示我的代码：
GUInterface.java
import java.awt.EventQueue;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
public class GUInterface {
private JFrame frame;
private JTextField fieldStudentsGroup, fieldStudentsTotal;
private JButton btnGenerateGroup;
private JLabel labelStudentsTotal, labelStudentsGroup;
private int valueStudentsGroup, valueStudentsTotal;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
GUInterface window = new GUInterface();
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public GUInterface() {
initialize();
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
/* GUI */
frame = new JFrame();
frame.setTitle("Group Randomizer");
frame.setBounds(100, 100, 450, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(new GridLayout(0, 1, 0, 0));
/* Students per Group */
labelStudentsGroup = new JLabel("Students in a Group");
frame.getContentPane().add(labelStudentsGroup);
fieldStudentsGroup = new JTextField();
frame.getContentPane().add(fieldStudentsGroup);
fieldStudentsGroup.setColumns(10);
/* Total Number of Students */
labelStudentsTotal = new JLabel("Number of Students");
frame.getContentPane().add(labelStudentsTotal);
fieldStudentsTotal = new JTextField();
frame.getContentPane().add(fieldStudentsTotal);
fieldStudentsTotal.setColumns(10);
/* Action Listener */
thehandler handler = new thehandler();
fieldStudentsTotal.addActionListener(handler);
fieldStudentsGroup.addActionListener(handler);
btnGenerateGroup = new JButton("Generate Group");
frame.getContentPane().add(btnGenerateGroup);
btnGenerateGroup.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
//System.out.println(getValueStudentsTotal());
//System.out.println(getValueStudentsGroup());
GroupGenerator gg = new GroupGenerator();
gg.setStudents(getValueStudentsTotal());
gg.setStudentsGroup(getValueStudentsGroup());
gg.generateGroup();
}
});
}
private class thehandler implements ActionListener{
public void actionPerformed(ActionEvent event) {
String string = "";
if(event.getSource() == fieldStudentsTotal) {
setValueStudentsTotal(Integer.parseInt(fieldStudentsTotal.getText()));
string = String.format("Students: %s", getValueStudentsTotal());
labelStudentsTotal.setText(string);
//System.out.println(getValueStudentsTotal());
}
else if(event.getSource() == fieldStudentsGroup) {
setValueStudentsGroup(Integer.parseInt(fieldStudentsGroup.getText()));
string = String.format("Students in a Group: %s", getValueStudentsGroup());
labelStudentsGroup.setText(string);
//System.out.println(getValueStudentsGroup());
}
}
}
public int getValueStudentsGroup() {
return valueStudentsGroup;
}
private void setValueStudentsGroup(int valueStudentsGroup) {
this.valueStudentsGroup = valueStudentsGroup;
}
public int getValueStudentsTotal() {
return valueStudentsTotal;
}
private void setValueStudentsTotal(int valueStudentsTotal) {
this.valueStudentsTotal = valueStudentsTotal;
}
}
GroupGenerator.java
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.AbstractTableModel;
public class GroupGenerator {
private int students, studentsGroup, row, col;
private int[] numbers, solutionArray;
private Object[][] results, data;
public void generateGroup() {
numbers = new int[students];
for(int i = 0; i < students; i++) {
numbers[i] = i + 1;
}
solutionArray = new int[students+1];
solutionArray = numbers;//convertIntegers(solutionList);
results = new Integer[solutionArray.length][studentsGroup];
shuffleArray(solutionArray);
// Testing if the array works
for (int row = 0, x = 0; x < solutionArray.length; row++) {
for (int col = 0; col < studentsGroup; col++, x++) {
System.out.print(" " + solutionArray[x] + " ");
results[row][col] = solutionArray[x];
}
System.out.print("\n");
}
// EDIT: added code
/* MyTableModel tm = new MyTableModel();
tm.setCol(col);
tm.setRow(row);
tm.setData(results);
GroupResults gr = new GroupResults();
gr.start();
gr.setCol(getCol());
gr.setRow(getRow());
gr.setData(getResults());*/
}
public void setStudents(int students) {
this.students = students;
}
public void setStudentsGroup(int studentsGroup) {
this.studentsGroup = studentsGroup;
}
// Implementing Fisher–Yates shuffle
private static void shuffleArray(int[] ar) {
Random rnd = new Random();
for (int i = ar.length - 1; i > 0; i--) {
int index = rnd.nextInt(i + 1);
// Simple swap
int a = ar[index];
ar[index] = ar[i];
ar[i] = a;
}
}
public static int[] convertIntegers(List<Integer> integers) {
int[] ret = new int[integers.size()];
for (int i=0; i < ret.length; i++) {
ret[i] = integers.get(i).intValue();
}
return ret;
}
}
正如您所看到的，我正在尝试创建一个群组随机数发生器。这是给我在学校的老师。问题是，应用程序仅在控制台中工作（如果导出，命令提示符/终端）。
我的计划是制作一个JTable并将其显示在一个单独的窗口中。我已将值数组转换为多维数组（对于我在其他帖子中的混淆感到抱歉）。现在我所要做的就是将值显示为JTable中的GUI。但是，每当我尝试时，表格都会显示为空白。我试图使用AbstractTableModel，但它永远不会起作用（主要是由于混乱）。有人可以帮我吗？提前谢谢！
编辑： 我添加了用于设置上面JTable值的代码。 这是我尝试制作JTable：
GroupResults.java
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.border.EmptyBorder;
public class GroupResults extends JDialog {
private final JPanel contentPanel = new JPanel();
private Object[][] data;
private int col, row;
private JTable table;
public void start() {
try {
String[] title = {"hi"};
//System.out.println(data[0][0]);
//table = new JTable(data, title);
//getContentPane().add(table, BorderLayout.CENTER);
GroupResults dialog = new GroupResults();
dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
dialog.setVisible(true);
//showTable();
} catch (Exception e) {
e.printStackTrace();
}
}
public GroupResults() {
MyTableModel tm = new MyTableModel();
setBounds(100, 100, 450, 300);
getContentPane().setLayout(new BorderLayout());
contentPanel.setLayout(new FlowLayout());
contentPanel.setBorder(new EmptyBorder(5, 5, 5, 5));
getContentPane().add(contentPanel, BorderLayout.CENTER);
/* Bottom Layer */
{
JPanel buttonPane = new JPanel();
buttonPane.setLayout(new FlowLayout(FlowLayout.RIGHT));
getContentPane().add(buttonPane, BorderLayout.SOUTH);
{
JButton okButton = new JButton("OK");
okButton.setActionCommand("OK");
okButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
//showTable();
dispose();
}
});
buttonPane.add(okButton);
getRootPane().setDefaultButton(okButton);
}
}
table = new JTable(tm);
getContentPane().add(table, BorderLayout.CENTER);
}
// Another attempt
/* public void showTable() {
if(data != null) {
String[] title = {"hi"};
//MyTableModel tm = new MyTableModel();
table = new JTable(data, title);
//table.setTableHeader(null);
//table.setFillsViewportHeight(true);
JScrollPane pane = new JScrollPane(table);
pane.add(table);
contentPanel.add(panetable, BorderLayout.CENTER);
contentPanel.revalidate();
contentPanel.repaint();
}
}*/
/* Setters */
public void setData(Object[][] data) {
this.data = data;
}
public void setCol(int col) {
this.col = col;
}
public void setRow(int row) {
this.row = row;
}
}
MyTableModel.java（我尝试过以下教程）
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableModel;
public class MyTableModel extends AbstractTableModel implements TableModelListener{
private int col, row;
private Object[][] data;
GroupGenerator gg = new GroupGenerator();
/* Number of Columns */
@Override
public int getColumnCount() {
System.out.println("TM " + getCol());
System.out.println(data[0][0]);
return getCol();
}
/* Number of Rows */
@Override
public int getRowCount() {
System.out.println("TM " + getRow());
return getRow();
}
/* Getting Values */
@Override
public Object getValueAt(int row, int col) {
return data[row][col];
}
/* Setting Values */
/* public void setValueAt(Object value, int row, int col) {
if(true) {
// Set title "Group"
}
data[row][col] = value;
fireTableCellUpdated(row, col);
}*/
/* Editable/Uneditable Table */
public boolean isCellEditable(int row, int col) {
return false;
}
public void refreshTable() {
fireTableDataChanged();
}
public void setCol(int col) {
this.col = col;
System.out.println("TM Col " + getCol());
}
public int getCol() {
return col;
}
public void setData(Object[][] data) {
this.data = data;
System.out.println(data[0][0]);
}
public Object[][] getData() {
return data;
}
public void setRow(int row) {
this.row = row;
System.out.println("TM Row " + getRow());
}
public int getRow() {
return row;
}
/* @Override
public void tableChanged(TableModelEvent e) {
row = e.getFirstRow();
col = e.getColumn();
TableModel model = (TableModel)e.getSource();
fireTableDataChanged();
}*/
@Override
public void tableChanged(TableModelEvent arg0) {
fireTableStructureChanged();
}
@Override
public void setValueAt(Object value, int a, int b) {
data[a][b] = value;
fireTableCellUpdated(a,b);
}
}