FULL PRODUCT VERSION :
java version "1.8.0_92"
Java(TM) SE Runtime Environment (build 1.8.0_92-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.92-b14, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 10.0.10586]

A DESCRIPTION OF THE PROBLEM :
This is a follow up to bug id JDK-8133309, which is fixed and targeted for java9. Happily I discoverd, however, that it is partially already implemented in the last jdk8 update. So my request is to implement the fix also for the "Miscellaneous Technical" code chart (2300–23FF), as it will take another 10 month till java9 will be released.
Thank you.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile and run the sample code.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
"Miscellaneous Technical" characters displayed.
ACTUAL -
Empty boxes.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.swing.*;

public class Unicode extends JFrame {
  public static final long serialVersionUID = 1L;

/*
\u2600, \u26FF= first and last character in code chart "Miscellaneous Symbols"
\u2300, \u23FF= first and last character in code chart "Miscellaneous Technical"
*/
  final String TEXT= "Hello \u2611\u2600\u26FF\u2300\u23FF";

  public Unicode() {
    setSize(350,120);
    setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    setTitle(TEXT);
    Box box= Box.createVerticalBox();
    box.add(new JButton(TEXT));
    box.add(new JLabel(TEXT));
    box.add(new JTextField(TEXT));
    add(box);
    setVisible(true);
  }


  public static void main(String args[]) {
    SwingUtilities.invokeLater(Unicode::new);
  }

}

---------- END SOURCE ----------