嗨,如果你把JComboBox JTable和String []数组到JComboBox一切正常。如果您将自己的数据类型添加到JComboBox,则在同一列中选择值会变得很复杂。这里是official example。尝试改变以下部分:JTable,JComboBox使用自定义对象
JComboBox comboBox = new JComboBox();
comboBox.addItem("Snowboarding");
comboBox.addItem("Rowing");
comboBox.addItem("Knitting");
comboBox.addItem("Speed reading");
comboBox.addItem("Pool");
comboBox.addItem("None of the above");
sportColumn.setCellEditor(new DefaultCellEditor(comboBox));
分为:
JComboBox comboBox = new JComboBox();
comboBox.addItem(new Test("Snowboarding"));
comboBox.addItem(new Test("Rowing"));
comboBox.addItem(new Test("Knitting"));
comboBox.addItem(new Test("Speed reading"));
comboBox.addItem(new Test("Pool"));
comboBox.addItem(new Test("None of the above"));
sportColumn.setCellEditor(new DefaultCellEditor(comboBox));
,并创造新的数据类型:
public class Test {
private String name;
public Test(String name) {
this.name = name;
}
@Override
public String toString() {
return name;
}
}
你会看到,当你在女巫点击表格单元格存在的JComboBox与自定义数据类型。第一列单元格的值被自动选择。如何解决这个问题?
编辑1:我加了SSCCE。
主类:
import java.awt.BorderLayout;
public class windw extends JFrame {
private JPanel contentPane;
private JTable table;
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
windw frame = new windw();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public windw() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setLayout(new BorderLayout(0, 0));
setContentPane(contentPane);
table = new JTable();
String[] grupes2 = new String[3];
grupes2[0] = "first";
grupes2[1] = "second";
grupes2[2] = "third";
table.setModel(new DefaultTableModel(
new Object[][] {
{new JComboBox<String>(grupes2)},
{new JComboBox<String>(grupes2)},
{new JComboBox<String>(grupes2)},
{new JComboBox<String>(grupes2)},
{new JComboBox<String>(grupes2)},
{new JComboBox<String>(grupes2)},
{new JComboBox<String>(grupes2)},
},
new String[] {
"Column name"
}
));
TableColumn sportColumn = table.getColumnModel().getColumn(0);
sportColumn.setCellEditor(new DefaultCellEditor(new JComboBox<String>(grupes2)));
sportColumn.setCellRenderer(new Renderer(grupes2));
contentPane.add(table, BorderLayout.CENTER);
}
}
渲染:
import java.awt.Component;
import javax.swing.JComboBox;
import javax.swing.JTable;
import javax.swing.table.TableCellRenderer;
public class Renderer extends JComboBox implements TableCellRenderer {
public Renderer(String[] items) {
super(items);
}
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
if (isSelected) {
setForeground(table.getSelectionForeground());
super.setBackground(table.getSelectionBackground());
} else {
setForeground(table.getForeground());
setBackground(table.getBackground());
}
// Select the current value
setSelectedItem(value);
return this;
}
}
为了更快提供更好的帮助,请发布[SSCCE](http://sscce.org/)。 – 2012-01-10 14:37:58