Question

所以在我的计算器程序中，我想设置equals操作，通过按Enter键（在主键盘上）或按下回车键（在小键盘上）可以计算出数学问题。我知道这些数字是VK_NUMPAD0 - VK_NUMPAD9，VK_ADD，VK_SUBTRACT，VK_MULTIPLY，VK_DIVIDE。但是我似乎找不到一个输入键。 VK_ENTER用于键盘输入键。我还查看了KeyEvent.KEY_LOCATION_NUMPAD，但不确定如何将其添加到我的代码中以使其工作。我有一个名为SetupKeyInput（）的方法，它接受一些参数来添加inputmap和actionmap的键绑定。

Private Sub recruit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles recruit.Click
    Dim query3 As String
    Dim n As Integer
    Dim query2 As String = "select max(stag) from agent"
    con.ConnectionString = ("Data Source=DESKTOP-CTN5IJ3\SQLEXPRESS;Integrated Security=True")
    Dim autono As New SqlCommand(query2, con)
    con.Open()
    If IsDBNull(autono.ExecuteScalar) Then
        n = 7
    Else
        n = autono.ExecuteScalar + 5
    End If
    con.Close()
    query3 = "insert into agent values(" + n + ",'" + ncrypt(txtssn.Text) + "','" + ncrypt(txtname.Text) + "','" + ncrypt(txtadd.Text) + "',0,0,'newbpwd')"
    Dim save As New SqlCommand(query3, con)
    con.Open()
    save.ExecuteNonQuery()
    con.Close()
End Sub

所以，我可以像这样调用函数

private void SetupKeyInput(JButton component, int keyStroke, int mask) {
  component.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke(keyStroke, mask), "hmm");
component.getActionMap().put("hmm", new MyButtonEvents(component));

}

我对小键盘输入缺少什么？我也试过这个

SetupKeyInput(buttonEquals, KeyEvent.VK_ENTER, 0); // Only works for keyboard enter

用于numpad上的回车键的Java getInputMap（）

0 个答案: