Checking the number of links, buttons, or text fields on the page.

检查页面上的链接、按钮和文本字段的数量。

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As you can see, the JPanel consists of a number of text fields, labels, and two radio buttons.

正如您看到的一样，JPanel由一些文本字段、标签和两个单选按钮组成。

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For example, Lotus Notes has another applet called the Action Bar applet that holds a number of Action buttons, as Figure 3 shows.

例如，Lotus Notes具有另外一种称为Action Bar的包含许多Action按钮的applet，如图3所示。

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What are all those number buttons for?

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