private void fillCombo(){ Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/MTD","root","");
PreparedStatement ps = con.prepareStatement("Select * from sa where municipalities ='" + municipality.getSelectedItem().
我希望JCombobox接受一个字符数组。我似乎找不到办法解决这个问题。基本上,我希望JCombobox保存'0‘- '9’值,但作为字符而不是int。char[] levels = {'0', '1', '2', '3'};
skillLevelCombo = new JComboBox<Object>(levels); //Does not work
for (int i = 0; i<10; i++) { jComboBox1.addItem(str_rep); jComboBox1.setSelectedItem(null);将数字添加到组合框中后,我将所选项设置为空,因为我不希望在按下按钮后组合框显示第一个元素private void jComboBox1ActionPerformed(java.awt.event.ActionEvent e