Question

我是JAVA的新手，我正在尝试制作一个JTable。我想要的是，只要用户从Jtable中的comboBox中进行选择，Jtable就会将当前日期放在comboBox旁边的单元格中。我写了一段代码，但代码无法提升单元格值。这是我的代码（我只想让Jtable在第1行第4列插入“a”）。

 public class GChamber extends JPanel {
private boolean DEBUG = true;
 ListSelectionModel listSelectionModel;
public GChamber() {

    ...

    JTable table1 = new JTable(new Table1());
    listSelectionModel = table1.getSelectionModel();

    table1.setSelectionModel(listSelectionModel);

    ...

    TableColumn TestName=table1.getColumnModel().getColumn(3);
    final JComboBox comboBox= new JComboBox();

    //Setup comboBox. The data of comboBox is from another Jtable.
    for(int i=0;i<table2rowlength;i++)
    {
     comboBox.addItem(Listofdiease[i]);
    }

    comboBox.addActionListener(new ActionListener() 
    TestName.setCellEditor(new DefaultCellEditor(comboBox));
    {

        @Override
        public void actionPerformed(ActionEvent e) {

             String userinput = (String)comboBox.getSelectedItem();
             Table1 temp=new Table1();
              for(int i=0;i<table2rowlength;i++)
                {
                  if (userinput.equals(Listofdiease[i])) {
                      temp.setValueAt("a", 1, 4);

                    }
                }

        }
    });


   ....


}
public class Table1 extends AbstractTableModel  {


        String[] cName1 = {"1","2","3","4","5", "6"};
         Object[][] data1 = {
                {"CC040-2", new Integer(1),"", "","",""}, 
                {"CC040-2", new Integer(2),"Rowing", "", "",""},
                {"CC040-2", new Integer(3),"Knitting", "", "",""},
                {"CC040-2", new Integer(4),"Speed reading", "", "",""},
                {"CC040-2", new Integer(5),"Pool", "", "",""},
                {"CC040-2", new Integer(6),"Pool", "", "",""},
                {"CC040-2", new Integer(7),"Pool", "", "",""},
                {"CC040-2", new Integer(8),"Pool", "", "",""},
                {"CC040-2", new Integer(9),"Pool", "", "",""},
                {"CC040-2", new Integer(10),"Pool", "", "",""},
                {"CC040-2", new Integer(11),"Pool", "", "",""},
                {"CC040-2", new Integer(12),"Pool", "", "",""},
                {"CEA003", new Integer(13),"Pool","", "",""},
                {"CEA003", new Integer(14),"Pool", "", "",""},
                {"CEA003", new Integer(15),"Pool", "", "",""},
                {"CEA003", new Integer(16),"Pool", "", "",""},
                {"CEA004", new Integer(17),"Pool", "", "",""},
                {"CEA004", new Integer(18),"Pool", "", "",""},
                {"CEA004", new Integer(19),"Pool", "", "",""},
                {"CEA004", new Integer(20),"Pool", "", "",""},
        };




        public int getColumnCount() {
            return cName1.length;
        }

        public int getRowCount() {
            return data1.length;
        }

        public String getColumnName(int col) {
            return cName1[col];
        }

        public Object getValueAt(int row, int col) {
            return data1[row][col];
        }


        public Class getColumnClass(int c) {
            return getValueAt(0, c).getClass();
        }


        public boolean isCellEditable(int row, int col) {

            if (col < 2) {
                return false;
            } else {
                return true;
            }
        }


        public void setValueAt(Object value, int row, int col) {
            if (DEBUG) {
                System.out.println("Setting value at " + row + "," + col
                                   + " to " + value
                                   + " (an instance of "
                                   + value.getClass() + ")");
            }

            data1[row][col] = value;
            fireTableCellUpdated(row, col);

            if (DEBUG) {
                System.out.println("New value of data:");
                printDebugData();
            }
        }

        private void printDebugData() {
            int numRows = getRowCount();
            int numCols = getColumnCount();

            for (int i=0; i < numRows; i++) {
                System.out.print("    row " + i + ":");
                for (int j=0; j < numCols; j++) {
                    System.out.print("  " + data1[i][j]);
                }
                System.out.println();
            }
            System.out.println("--------------------------");
        }


        public void addTableModelListener(TableModelListener l) {


        }

}

有没有人可以告诉我为什么这段代码不起作用以及如何修复它？

Answer 1

您可以使用建议的here方法之一。如果从属列不可编辑，只需根据组合选择从TableModel返回所需的结果。如果依赖列可编辑，请使用显示here的任一方法。

如何让JTable监听用户的选择并更新单元格值

1 个答案: