java - JTable 中的 JComboBox

Question

我在 JTable 的第 3 列和第 4 列中有一个 JComboBox，但我不知道如何获取它的项目...问题不是获取项目的方法，而是演员表

JComboBox combo=(JComboBox) jTable1.getColumnModel().getColumn(3).getCellEditor();

你能帮我吗？

Answer 1

被JComboBox包裹在一个CellEditor. 您必须检索包装的组件，例如在使用时DefaultCellEditor：

DefaultCellEditor editor = (DefaultCellEditor)table.getColumnModel().getColumn(3).getCellEditor();
JComboBox combo = (JComboBox)editor.getComponent();

Answer 2

阅读本教程，了解如何在 JTable 中使用 JCombobox 作为编辑器。
http://docs.oracle.com/javase/tutorial/uiswing/components/table.html#combobox

Answer 3

尝试这样的事情：

 public void example(){  

      TableColumn tmpColum =table.getColumnModel().getColumn(1);
      String[] DATA = { "Data 1", "Data 2", "Data 3", "Data 4" };
      JComboBox comboBox = new JComboBox(DATA);

      DefaultCellEditor defaultCellEditor=new DefaultCellEditor(comboBox);
      tmpColum.setCellEditor(defaultCellEditor);
      tmpColum.setCellRenderer(new CheckBoxCellRenderer(comboBox));
      table.repaint();
   }


/**
   Custom class for adding elements in the JComboBox.
*/
class CheckBoxCellRenderer implements TableCellRenderer {
        JComboBox combo;
        public CheckBoxCellRenderer(JComboBox comboBox) {
            this.combo = new JComboBox();
            for (int i=0; i<comboBox.getItemCount(); i++){
                combo.addItem(comboBox.getItemAt(i));
            }
        }
        public Component getTableCellRendererComponent(JTable jtable, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
            combo.setSelectedItem(value);
            return combo;
        }
    }