题目内容

有如下事件过程： Private Sub Commaild1_Click( ) Dim i As Integer For i =1 To 2 DC Next i End Sub Sub DC( ) Dim x As Integer，m As String Static y，n x=x + 1 y=y + 1 m=m&"*"：n=n &"#" Print x，y，m，n End Sub 程序运行后，输出的结果是( )。

A. 布局管理器是用来管理构件放置在容器的位置和大小的
B. 为了使生成的图形用户界面具有良好的平台无关性，Java语言提供了布局管理器这个工具来管理构件在容器的布局，而不是直接设置
C. 布局管理器本身也是一个接口，编程中通常使用的是实现了该接口的类
D. 以上说法都正确

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