User-Interfaces often need to temporarily display more information or ask for more input. Popup-menus and Dialog Boxes are simple forms of this, but have their own classes the AWT. An applet may also wish to become stand-alone, i.e. continue even when a new document is loaded in the browser. An independent window is created through the Frames class. (Note: for some unknown reason this example no longer works with Netscape Navigator but it does work with Microsoft Internet Explorer.)
Most of the source for this applet is:
public class FrameApplet extends Applet { public void init() { add(new Button("Open New Window")); } public boolean action (Event evt, Object arg) { if ("Open New Window".equals(arg)) { TestWindow theWindow = new TestWindow(); } return true; } } class TestWindow extends Frame { TestWindow() { super("Test Window"); setLayout(new FlowLayout(FlowLayout.CENTER)); resize(150, 50); add(new Button("Close")); show(); } public boolean action (Event evt, Object arg) { if ("Close".equals(arg)) dispose(); return true; } }