【发布时间】：2016-01-16 07:54:41
【问题描述】：
我在这里尝试做 3 件事：
首先我试图让组合框在你启动程序时显示“不进纸”，在它启动的那一刻它什么都不显示，只有当我点击组合框时它才会显示选项“喂”和“不喂”。
其次，我正在尝试对组合框进行验证，当我单击
JButton下一步时，它将验证组合框是否全部为“提要”，如果是这样，您将继续下一步，否则它将有一个弹出说“再次检查”-
最后，我想让前 4 列上的单元格不可编辑，最后一列可编辑。
public class DosageTableHelper { private static JTable toDoTable; private static JScrollPane jpane; private static int counter=1; public static DefaultTableModel getElderlyFromQueryDos(String timing,String position) throws SQLException { SQLObject so = new SQLObject(); ResultSet rs = null; if(timing.equalsIgnoreCase("Morning")){ PreparedStatement stmt = so.getPreparedStatementWithKey("SELECT morningdosage FROM et_elderly WHERE name = ?"); stmt.setString(1,position); stmt.executeQuery(); System.out.println(stmt); rs = stmt.getResultSet(); } else if(timing.equalsIgnoreCase("Afternoon")){ PreparedStatement stmt = so.getPreparedStatementWithKey("SELECT afternoondosage FROM et_elderly WHERE name = ?"); stmt.setString(1,position); stmt.executeQuery(); System.out.println(stmt); rs = stmt.getResultSet(); } else if(timing.equalsIgnoreCase("Noon")){ PreparedStatement stmt = so.getPreparedStatementWithKey("SELECT noondosage FROM et_elderly WHERE name = ?"); stmt.setString(1,position); stmt.executeQuery(); System.out.println(stmt); rs = stmt.getResultSet(); } return (DefaultTableModel) buildTableModel(rs); } @SuppressWarnings("unchecked") public static DefaultTableModel buildTableModel(ResultSet rs) throws SQLException { ArrayList<DosageObject> DosageList=null; System.out.println(rs); try { while(rs.next()){ ByteArrayInputStream in = new ByteArrayInputStream(rs.getBytes(1)); ObjectInputStream is = new ObjectInputStream(in); Object retrieveDosBlob =(Object) is.readObject(); if(retrieveDosBlob instanceof ArrayList<?>){ DosageList=((ArrayList<DosageObject>) retrieveDosBlob); } } } catch (ClassNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } // storing array list in an array list for future uses Vector<String> columnNames = new Vector<String>(); columnNames.add("Description"); columnNames.add("Prescription"); columnNames.add("Medication Type"); columnNames.add("Dosage"); columnNames.add("Checked"); Vector<Vector<Object>> data = new Vector<Vector<Object>>(); for(int k=0;k<DosageList.size();k++){ Vector<Object> vector = new Vector<Object>(); vector.add(DosageList.get(k).getMedDescrip()); vector.add(DosageList.get(k).getMedPrescrip()); vector.add(DosageList.get(k).getMedType()); vector.add(DosageList.get(k).getMedDosage()); data.add(vector); } DefaultTableModel dtm = new DefaultTableModel(data, columnNames) { private static final long serialVersionUID = 4234183862785566645L; @Override public boolean isCellEditable(int rowIndex, int columnIndex) { return !( rowIndex == 1 && columnIndex == 1 ); } }; return dtm; } // Debug-able main method public static void main(String[] args) throws SQLException { ArrayList<String> nameList= new ArrayList<String>(); nameList.add("Lee Ching Chong"); nameList.add("Lim Kuay Siak"); nameList.add("Lee Ching Chong"); toDoTable =new JTable(getElderlyFromQueryDos("morning",nameList.get(0))); String[] values = new String[] { "Not Feed", "Feed" }; TableColumn col = toDoTable.getColumnModel().getColumn(4); col.setCellEditor(new MyComboBoxEditor(values)); col.setCellRenderer(new MyComboBoxRenderer(values)); jpane = new JScrollPane(toDoTable); JPanel panel = new JPanel(); JFrame frame = new JFrame(); frame.setBounds(0, 0, 700, 543); panel.add(jpane); frame.getContentPane().add(new JScrollPane(panel)); JButton btnNext = new JButton("Next"); panel.add(btnNext); frame.setVisible(true); btnNext.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { try { toDoTable.setModel(DosageTableHelper.getElderlyFromQueryDos("morning",nameList.get(counter))); String[] values = new String[] { "Not Feed", "Feed" }; TableColumn col = toDoTable.getColumnModel().getColumn(4); col.setCellEditor(new MyComboBoxEditor(values)); col.setCellRenderer(new MyComboBoxRenderer(values)); } catch (SQLException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } counter++; } }); } } @SuppressWarnings("rawtypes") class MyComboBoxRenderer extends JComboBox implements TableCellRenderer { private static final long serialVersionUID = 1319299961084034009L; @SuppressWarnings("unchecked") public MyComboBoxRenderer(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()); } setSelectedItem(value); return this; } } class MyComboBoxEditor extends DefaultCellEditor { private static final long serialVersionUID = -1702063500403826596L; @SuppressWarnings({ "rawtypes", "unchecked" }) public MyComboBoxEditor(String[] items) { super(new JComboBox(items)); } }
【问题讨论】：
标签： java swing combobox jtable jcombobox