FULL PRODUCT VERSION :
java version "1.8.0_25"
Java(TM) SE Runtime Environment (build 1.8.0_25-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
CentOS 7 ( Also verified on Redhat 7)
centos 3.10.0-123.9.3.el7.x86_64


EXTRA RELEVANT SYSTEM CONFIGURATION :
Intel chipset (multiple verified)
Nvidia graphics (multiple models verified)

I'll take one specific example for the rest of the configuration:

Nvidia graphics display driver : 340.58

/etc/X11/xorg.conf file:
Section "ServerLayout"
    Identifier "Default Layout"
    Screen 0 "Screen0" 0 0
    Screen 1 "Screen1" RightOf "Screen0"
    InputDevice "Keyboard0" "CoreKeyboard"
    InputDevice "Mouse0" "CorePointer"
    Option "Xinerama" "0"
EndSection

Section "InputDevice"

    # generated from default
    Identifier "Keyboard0"
    Driver "kbd"
EndSection

Section "InputDevice"

    # generated from default
    Identifier "Mouse0"
    Driver "mouse"
    Option "Protocol" "auto"
    Option "Device" "/dev/input/mice"
    Option "Emulate3Buttons" "no"
    Option "ZAxisMapping" "4 5"
EndSection

Section "Monitor"
    Identifier "Monitor0"
    VendorName "Unknown"
    ModelName "Sceptre E246W-1080P"
    HorizSync 29.0 - 81.0
    VertRefresh 55.0 - 76.0
EndSection

Section "Monitor"
    Identifier "Monitor1"
    VendorName "Unknown"
    ModelName "Sceptre E246W-1080P"
    HorizSync 29.0 - 81.0
    VertRefresh 55.0 - 76.0
EndSection

Section "Device"
    Identifier "Videocard0"
    Driver "nvidia"
EndSection

Section "Device"
    Identifier "Device0"
    Driver "nvidia"
    VendorName "NVIDIA Corporation"
    BoardName "GeForce GTX 560"
    BusID "PCI:7:0:0"
    Screen 0
EndSection

Section "Device"
    Identifier "Device1"
    Driver "nvidia"
    VendorName "NVIDIA Corporation"
    BoardName "GeForce GTX 560"
    BusID "PCI:7:0:0"
    Screen 1
EndSection

Section "Screen"
    Identifier "Default Screen"
    Device "Videocard0"
    Monitor "Monitor0"
EndSection

Section "Screen"

# Removed Option "metamodes" "DVI-I-3: nvidia-auto-select +0+0"
    Identifier "Screen0"
    Device "Device0"
    Monitor "Monitor0"
    DefaultDepth 24
    SubSection "Display"
        Depth 24
    EndSubSection
EndSection

Section "Screen"

# Removed Option "metamodes" "DVI-I-2: nvidia-auto-select +0+0"
    Identifier "Screen1"
    Device "Device1"
    Monitor "Monitor1"
    DefaultDepth 24
    SubSection "Display"
        Depth 24
    EndSubSection
EndSection


A DESCRIPTION OF THE PROBLEM :
When running with two separate X displays (:0.0 and :0.1) on one system, Java only renders one screen correctly. It renders fine on one screen or the other, but not both simultaneously. I was only able to test it with a dual monitor setup, so I'm not sure would it would do with multiple displays.

REGRESSION. Last worked in version 7u72

ADDITIONAL REGRESSION INFORMATION:
All versions of java 7 seem to work correctly. All versions of Java 8 seem to be broken.

Here is a specific version of java 7 that I know works.
java version "1.7.0_72"
Java(TM) SE Runtime Environment (build 1.7.0_72-b14)
Java HotSpot(TM) 64-Bit Server VM (build 24.72-b04, mixed mode)


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the code snippet below, and verify that only one screen is being rendered properly. A window is being displayed, but there is not text and the coloring looks off.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
When running the code in previous versions of java we would get the same window rendered on both screens.
ACTUAL -
Only one screen renders properly.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class JFrameTest {

  public static void main(String[] args) {
    GraphicsDevice[] devs = GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices();
    for (GraphicsDevice device : devs) {
      JFrame frame = new JFrame("My Test", device.getDefaultConfiguration());
      JPanel panel = new JPanel();
      panel.add(new JButton("THis is a test"));
      panel.add(new JLabel("This is a label"));
      frame.add(panel);
      frame.pack();
      frame.setVisible(true);
    }
  }
}

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

CUSTOMER SUBMITTED WORKAROUND :
None found; except for using a previous version of java.