Question

My applet pops up in a browser window and then creates a separate JFrame. I’d like to minimize the original hosting browser window. Can I do it from the applet?

Answer 1

You can’t minimize a browser window from the Applet or with Javascript. You can try playing around with the Javascript window blur and focus to see if you can make them work for you. Communicating with JS should be possible as follows

import netscape.javascript.*;
import java.applet.*;
import java.awt.*;
class MyApplet extends Applet {
  public void init() {
    JSObject win = JSObject.getWindow(this);
    JSObject doc = (JSObject) win.getMember("document");
    JSObject loc = (JSObject) doc.getMember("location");

    String s = (String) loc.getMember("href");  // document.location.href
    win.call("f", null);                 // Call f() in HTML page
  }
}

Code untested and taken from Oracle docs