Ctrl+Alt+L

Formatting a JAVA Document in VSCode requires one to follow the below steps:

1. Install the plugin: Language Support for Java(TM) by Red Hat from the Extensions window in VSCode.

   • You can open the Extensions window from the left aligned sidebar or simply by pressing Ctrl + Shift + X

2. Post Installation, from the required page with JAVA code

   • Right Click and choose Format Document With..
   • In the command pallette that opens up on top, select Language Support for Java(TM) by Red Hat option

The Java Document should be now properly formatted.

PS: Trying Alt+Shift+F may not work for users who have set their default formatter as Prettier - Code formatter or alike. By default, java formatting is not supported by it.
If Language Support for Java(TM) by Red Hat is the only formatter plugin installed, then Alt+Shift+F might work for you.

If you wish to bind Alt+Shift+F to format your JAVA Document,
then you can add the below configuration to your settings.json by:

1. Pressing Ctrl+, to open your Settings
2. From Top Right Corner, select Open Settings(JSON) either for User or Workspace settings.
3. Append the below JSON property to it and save:

    "[java]": {
        "editor.defaultFormatter": "redhat.java",
      },

JIndent (Commercial) does what you want:

http://www.jindent.com/

I've also used Jalopy in the past to do this, it's open source:

http://jalopy.sourceforge.net/

EDIT: I will note that Jalopy is fairly old and there doesn't seem to be any recent updates to it. I'm not quite sure if it will work with Java 5/6. You might want to look at Jacobe instead:

http://www.tiobe.com/index.php/content/products/jacobe/Jacobe.html

There's also a more complete list of formatters here on Roedy Green's site:

http://mindprod.com/jgloss/beautifier.html