JFrame not showing up in JApplet until applet is resized

Question

I am creating a Java applet, and I am trying to add a JFrame to it. I am calling:

add(new MyJFrameSubclass());

But when I launch the application, my JFrame isn't shown until I resize the window.

Answer 1

这可能只是一个基本建议，但是坚持使用validate()或repaint()有时可以解决看似复杂的问题。

Answer 2

A simple fix is to add a frame.show(); after you add your JFrame, I had the same issue and this seemed to help, the frame being the name of your JFrame.

Answer 3

JFrame and JApplet are both top-level containers . Instead of trying to have both containers present at once, put your content in a lightweight container such as JPanel ; then add that JPanel to either a JFrame (for local use) or a JApplet (for the browser). This example shows the approach.