Question

我正在尝试在Netbeans中创建一个Swing GUI。我创建了一个jcombobox并将它（使用查询组件，列表组件和渲染器）绑定到名为＆＃39; Item＆＃39;的实体，以便组合框显示表中当前存在的项的名称＆＃34;项目＆＃34;到目前为止它工作正常。但是，我需要添加一个＆＃34;所有项目＆＃34;字段到组合框。有没有人对我应该从哪里开始有任何暗示？

Answer 1

尝试

    List<String> listItems = classDAO.findElement();

    DefaultComboBoxModel<String> comboModel = new DefaultComboBoxModel();

    for(String string : listItems)
    {
        comboModel.addElement(string);
    }

    comboModel.addElement("All items");

    JComboBox<String> comboBox = new JComboBox<>(comboModel);

Answer 2

您可以在将表格中的项目添加到组合框后手动将项目添加到组合框中：

Sub InsertSortTest2()

    Dim Num  As Integer
    Dim C  As Integer
    Dim D  As Integer
    Dim Temp  As Integer
    Dim p As Integer

    p = Cells.CurrentRegion.Rows.Count

    Cells(2, 5) = p 'Just to check'

    ReDim Arr(p) As Integer
    Dim i As Long
    Dim R As Long

    For R = 1 To p
        i = Cells(R, 1)
        Num = p
        For C = 0 To Num - 1
            Arr(C) = i
        Next C
        For C = 1 To Num - 1
            D = C
            While D > 0 And (Arr(D) < Arr(D - 1))
                Temp = Arr(D)
                Arr(D) = Arr(D - 1)
                Arr(D - 1) = Temp
                D = D - 1
            Wend
        Next C
        For C = 0 To Num - 1
            Range("A" & C + 1).Value = Arr(C)

        Next C
    Next R
End Sub

将在组合框的顶部插入一个新项目。

如何添加＆＃34;所有项目＆＃34;字段到jcombobox

2 个答案: