java-在JTable中具有多个JComboBoxes具有不同的值
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我想创建一个JTable,其中应在名为“工具”的特定列中容纳JComboBox. JComboBox的值对于每一行应该有所不同.
在构造函数中,我具有以下代码:
public Table(List<Software> software_list) throws TransformerFactoryConfigurationError, TransformerException, Exception {
//****** create an 2D array object containing the emulators list data to be sent to the table model ******
software_list_to_array = new Object[software_list.size()][5];
for(int x = 0; x < software_list_to_array.length; x++){
software_list_to_array[x][0] = software_list.get(x).getNumber();
software_list_to_array[x][1] = software_list.get(x).getAuthor();
software_list_to_array[x][2] = software_list.get(x).getReleaseDate();
software_list_to_array[x][3] = software_list.get(x).getName();
app_str = new String[software_list.get(x).getApp().size()];
System.out.println(app_str.length);
for(int k = 0; k < app_str.length; k++){
app_str[k] = software_list.get(x).getApp().get(k).getName()
+ " " + software_list.get(x).getApp().get(k).getVersion();
}
software_list_to_array[x][4] = app_str;
}
tableModel = new SftTableModel(software_list_to_array, software_list_to_array.length);
this.setModel(tableModel);
this.setSize(new Dimension(1000,500));
this.setRenderingProperties(app_str);
}
我创建了以下方法:
public void setRenderingProperties(String[] str){
this.setRowHeight(25);
this.getTableHeader().setFont(new Font("Arial", Font.BOLD,12));
this.getTableHeader().setAlignmentY(Component.RIGHT_ALIGNMENT);
this.setAutoCreateRowSorter(true);
this.setShowGrid(false);
this.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
...........
if(app_str.length > 1){
this.getColumn("Tools").setCellRenderer(new ComboBoxRenderer());
JComboBox comboBox = new JComboBox();
for(int k=0;k<app_str.length;k++){
comboBox.addItem(app_str[k]);
}
this.getColumn("Tools").setCellEditor(new DefaultCellEditor(comboBox));
}else{
this.getColumn("Tools").setCellRenderer(new CellsRenderer());
}
this.getColumn("Tools").setResizable(true);
this.getColumn("Tools").setPreferredWidth(250);
}
此代码的问题在于,在“工具”列中,所有组合框都包含所有相同的值.有人对这个问题有建议吗?
解决方法:
您可以重写JTable的getCellEditor(…)以返回特定的编辑器.就像是:
import java.awt.*;
import java.awt.event.*;
import java.util.List;
import java.util.ArrayList;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.table.*;
public class TableComboBoxByRow extends JFrame
{
List<TableCellEditor> editors = new ArrayList<TableCellEditor>(3);
public TableComboBoxByRow()
{
// Create the editors to be used for each row
String[] items1 = { "Red", "Blue", "Green" };
JComboBox comboBox1 = new JComboBox( items1 );
DefaultCellEditor dce1 = new DefaultCellEditor( comboBox1 );
editors.add( dce1 );
String[] items2 = { "Circle", "Square", "Triangle" };
JComboBox comboBox2 = new JComboBox( items2 );
DefaultCellEditor dce2 = new DefaultCellEditor( comboBox2 );
editors.add( dce2 );
String[] items3 = { "Apple", "Orange", "Banana" };
JComboBox comboBox3 = new JComboBox( items3 );
DefaultCellEditor dce3 = new DefaultCellEditor( comboBox3 );
editors.add( dce3 );
// Create the table with default data
Object[][] data =
{
{"Color", "Red"},
{"Shape", "Square"},
{"Fruit", "Banana"},
{"Plain", "Text"}
};
String[] columnNames = {"Type","Value"};
DefaultTableModel model = new DefaultTableModel(data, columnNames);
JTable table = new JTable(model)
{
// Determine editor to be used by row
public TableCellEditor getCellEditor(int row, int column)
{
int modelColumn = convertColumnIndexToModel( column );
if (modelColumn == 1 && row < 3)
return editors.get(row);
else
return super.getCellEditor(row, column);
}
};
JScrollPane scrollPane = new JScrollPane( table );
getContentPane().add( scrollPane );
// table.getColumnModel().getColumn(1).setCellRenderer(new ComboBoxRenderer() );
}
/*
class ComboBoxRenderer extends JComboBox implements TableCellRenderer
{
public ComboBoxRenderer()
{
setBorder(new EmptyBorder(0, 0, 0, 0));
}
public Component getTableCellRendererComponent(
JTable table, Object value, boolean isSelected,
boolean hasFocus, int row, int column)
{
// setFocusable(false);
removeAllItems();
addItem( value );
return this;
}
}
*/
public static void main(String[] args)
{
TableComboBoxByRow frame = new TableComboBoxByRow();
frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
frame.pack();
frame.setVisible(true);
}
}
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