[英]How to change class of JTable cell to JCheckBox?
我的GUI中有一個(或多或少)空的JTable,開頭沒有任何JCheckBoxes。 按下按鈕后,我想根據數組的內容用名稱(字符串)和JCheckBoxes填充表。 具有名稱的部分已經可以正常工作,但是我無法將單個單元格的類更改為布爾值,而是在JTable實際應位於的JTable中顯示true或false。 我知道如果在開始時將列類型設置為布爾值,則可以用JCheckBoxes填充完整的列。
我現在的問題是,是否可以更改單個單元格的列類型。
這是創建JTable的代碼:
table = new JTable();
table.setRowMargin(3);
table.setRowHeight(25);
table.setFillsViewportHeight(true);
table.setModel(new DefaultTableModel(
new Object[][] {
{null, "Monday", "Tuesday", "Wednesday", "Thursday", "Friday"},
{"", "2016-02-29", "2016-03-01", "2016-03-02", "2016-03-03", "2016-03-04"},
{" 1. Lesson", null, null, null, null, null},
{" 2. Lesson", null, null, null, null, null},
{" 3. Lesson", null, null, null, null, null},
{" 4. Lesson", null, null, null, null, null},
{" 5. Lesson", null, null, null, null, null},
{" 6. Lesson", null, null, null, null, null},
{" 7. Lesson", null, null, null, null, null},
{" 8. Lesson", null, null, null, null, null},
{" 9. Lesson", null, null, null, null, null},
{" 10. Lesson", null, null, null, null, null},
},
new String[] { "Empty", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday" }
)
{
Class[] columnTypes = new Class[]
{
String.class, Object.class, Object.class, Object.class, Object.class, Object.class
};
public Class getColumnClass(int columnIndex)
{
return columnTypes[columnIndex];
}
});
table.setBorder(new LineBorder(new Color(0, 0, 0)));
table.setBounds(381, 11, 518, 300);
panel.add(table);
這是更改JTable內容的部分:
public void tableUpdate(Object[][] a)
{
for(int row = 0; row < 11; row++)
{
for(int column = 0 ; column < 5; column++)
{
table.setValueAt(a[column][row], row+1, column+1);
}
}
}
如果您需要更多信息,請先問我,並在此先感謝。
您可以執行以下操作:
import java.awt.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class TablePropertyEditor extends JFrame
{
public TablePropertyEditor()
{
String[] columnNames = {"Type", "Value"};
Object[][] data =
{
{"String", "I'm a string"},
{"Date", new Date()},
{"Integer", new Integer(123)},
{"Double", new Double(123.45)},
{"Boolean", Boolean.TRUE}
};
JTable table = new JTable(data, columnNames)
{
private Class editingClass;
public TableCellRenderer getCellRenderer(int row, int column)
{
editingClass = null;
int modelColumn = convertColumnIndexToModel(column);
if (modelColumn == 1)
{
Class rowClass = getModel().getValueAt(row, modelColumn).getClass();
return getDefaultRenderer( rowClass );
}
else
return super.getCellRenderer(row, column);
}
public TableCellEditor getCellEditor(int row, int column)
{
editingClass = null;
int modelColumn = convertColumnIndexToModel(column);
if (modelColumn == 1)
{
editingClass = getModel().getValueAt(row, modelColumn).getClass();
return getDefaultEditor( editingClass );
}
else
return super.getCellEditor(row, column);
}
// This method is also invoked by the editor when the value in the editor
// component is saved in the TableModel. The class was saved when the
// editor was invoked so the proper class can be created.
public Class getColumnClass(int column)
{
return editingClass != null ? editingClass : super.getColumnClass(column);
}
};
table.setPreferredScrollableViewportSize(table.getPreferredSize());
JScrollPane scrollPane = new JScrollPane( table );
getContentPane().add( scrollPane );
}
public static void main(String[] args)
{
TablePropertyEditor frame = new TablePropertyEditor();
frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
frame.pack();
frame.setLocationRelativeTo( null );
frame.setVisible(true);
}
}
它根據單元格中的數據而不是列類確定要使用的渲染器/編輯器。
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