java - JTable组合框

Question

由于某些原因，这被删除了。这个问题已关闭，我不会阅读它，因为我已经向前推进并实现了更多的工作方法。所以没必要在这里放尖刻的评论，我不会看的。

好吧，这可能是一个非常简单的问题，但现在就开始吧。我正在设置一个 JTable 进行编辑，我希望第 1 列有一个组合框编辑器。我查看了如何执行此操作并按照引导我找到下面代码的说明进行操作，但它似乎并没有真正更新到显示中。我在这里错过了什么？提前谢谢你。

//MainWindow class
public class MainWindow extends JFrame{
GridBagConstraints gbc;
JTable gridDisplay;
private AbstractTableModel tableModel;
JLabel statusBar;

MainWindow()
{
    super("LayoutEditor");
    setLayout(new BorderLayout());
    setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    gridDisplay = new JTable();
    tableModel = new MyTableModel();
    gridDisplay.setAutoCreateRowSorter(true);
    gridDisplay.setColumnSelectionAllowed(true);
    gridDisplay.setCellSelectionEnabled(true);
    gridDisplay.setModel(tableModel);


    TableColumn tc = gridDisplay.getColumnModel().getColumn(0);
    JComboBox<String> cb = new JComboBox<String>();
    cb.addItem("JLabel");
    cb.addItem("JButton");
    cb.addItem("JTextField");
    cb.addItem("JTextArea");
    cb.addItem("JCheckBox");
    cb.addItem("JList");
    cb.addItem("JComboBox");
    cb.addItem("JSpinnerList");
    cb.addItem("JSpinnerNumber");
    cb.setSelectedIndex(0);
    tc.setCellEditor(new DefaultCellEditor(cb));
    MyDataModel temp= new MyDataModel();
    MyTableModel table = (MyTableModel)gridDisplay.getModel();
    table.append(temp);




    JScrollPane gridScroll = new JScrollPane(gridDisplay);
    mainPanel.add(toolBox, BorderLayout.NORTH);
    mainPanel.add(gridScroll, BorderLayout.CENTER);

    add(mb, BorderLayout.NORTH);
    add(mainPanel, BorderLayout.CENTER);
    setSize(1280,720);
    setVisible(true);
    }
]

//myTableModel class
public class MyTableModel extends AbstractTableModel {
ArrayList<MyDataModel> data;
String[] names;

MyTableModel()
{

    names = new String[]{"Type","Variable name","Text","Row","Column","Rows","Columns","Fill","Anchor"};
    data = new ArrayList<MyDataModel>();



}
@Override
public int getRowCount() {
    return data.size();
}

@Override
public int getColumnCount() {
    return names.length;
}

@Override
public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
    switch (columnIndex)
    {
        case 0:
            data.get(rowIndex).setType(aValue.toString());
        case 1:
            data.get(rowIndex).setName(aValue.toString());
        case 2:
            data.get(rowIndex).setText(aValue.toString());
        case 3:
            data.get(rowIndex).setRow((int)aValue);
        case 4:
            data.get(rowIndex).setColumn((int)aValue);
        case 5:
            data.get(rowIndex).setRows((int)aValue);
        case 6:
            data.get(rowIndex).setColumns((int)aValue);
        case 7:
            data.get(rowIndex).setFill((int)aValue);
        case 8:
            data.get(rowIndex).setAnchor((int)aValue);
    }

    fireTableCellUpdated(rowIndex, columnIndex);
}

@Override
public Object getValueAt(int rowIndex, int columnIndex) {
    switch (columnIndex){
        case 0:
            return data.get(rowIndex).getType();
        case 1:
            return data.get(rowIndex).getName();
        case 2:
            return data.get(rowIndex).getText();
        case 3:
            return data.get(rowIndex).getRow();
        case 4:
            return data.get(rowIndex).getColumn();
        case 5:
            return data.get(rowIndex).getRows();
        case 6:
            return data.get(rowIndex).getColumns();
        case 7:
            return data.get(rowIndex).getFill();
        case 8:
            return data.get(rowIndex).getAnchor();
    }
return null;
}

public void append(MyDataModel item)
{
    data.add(item);
}

@Override
public String getColumnName(int column) {
    return names[column];
}
}


//MyDataModel Class
public class MyDataModel {
String type, name, text;
int row, column, rows, columns, fill, anchor;

MyDataModel()
{
    type = new String("");
    name = new String("");
    text = new String("");
    row = 0;
    column = 0;
    rows = 0;
    columns = 0;
    fill = 0;
    anchor = 0;
}

public MyDataModel(MyDataModel test) {
    type = test.getType();
    name = test.getName();
    text = test.getText();
    row = test.getRow();
    column = test.getColumn();
    rows = test.getRows();
    columns = test.getColumns();
    fill = test.getFill();
    anchor = test.getAnchor();
}

public int getAnchor() {
    return anchor;
}

public void setAnchor(int anchor) {
    this.anchor = anchor;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getText() {
    return text;
}

public void setText(String text) {
    this.text = text;
}

public int getRow() {
    return row;
}

public void setRow(int row) {
    this.row = row;
}

public int getColumn() {
    return column;
}

public void setColumn(int column) {
    this.column = column;
}

public int getRows() {
    return rows;
}

public void setRows(int rows) {
    this.rows = rows;
}

public int getColumns() {
    return columns;
}

public void setColumns(int columns) {
    this.columns = columns;
}

public int getFill() {
    return fill;
}

public void setFill(int fill) {
    this.fill = fill;
}

public String getType() {
    return type;
}

public void setType(String type) {
    this.type = type;
}
}

Answer 1

it doesn't seem to actually update into the display.

您从组合框中选择的值未保存在 TableModel 中。

您的 TableModel 需要实现 setValueAt(...) 方法。

请参阅 Create a Table Model 上的 Swing 教程部分一个简单的实现。它还向您显示要调用什么 fireXXX(...) 方法，以便将数据更改通知表。