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  1. JDK
  2. JDK-8058922

[headless] Can't create a JButton in headless mode (more AppContext woes)

    Details

    • Subcomponent:
    • CPU:
      x86
    • OS:
      windows_7

      Description

      FULL PRODUCT VERSION :
      java version "1.8.0_40-ea"
      Java(TM) SE Runtime Environment (build 1.8.0_40-ea-b06)
      Java HotSpot(TM) Client VM (build 25.40-b10, mixed mode, sharing)

      ADDITIONAL OS VERSION INFORMATION :
      Microsoft Windows [Version 6.1.7601]

      A DESCRIPTION OF THE PROBLEM :
      Due to a missing AppContext in headless mode, the creation of various Swing components fails, where previously it succeeded

      REGRESSION. Last worked in version 8u20

      ADDITIONAL REGRESSION INFORMATION:
      java version "1.8.0_40-ea"
      Java(TM) SE Runtime Environment (build 1.8.0_40-ea-b06)
      Java HotSpot(TM) Client VM (build 25.40-b10, mixed mode, sharing)

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      Run the attached program in headless mode (-Djava.awt.headless=true)

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      Program should execute without exceptions
      ACTUAL -
      An exception is thrown

      ERROR MESSAGES/STACK TRACES THAT OCCUR :
      Exception in thread "main" java.lang.NullPointerException
              at javax.swing.RepaintManager.currentManager(RepaintManager.java:262)
              at javax.swing.JComponent.repaint(JComponent.java:4799)
              at java.awt.Component.repaint(Component.java:3303)
              at javax.swing.AbstractButton.setModel(AbstractButton.java:1784)
              at javax.swing.JButton.<init>(JButton.java:134)
              at javax.swing.JButton.<init>(JButton.java:91)
              at bug.Bug.main(Bug.java:5)

      REPRODUCIBILITY :
      This bug can be reproduced always.

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

      public class Bug {
          public static void main(String... argv) throws Exception {
              new JButton();
          }
      }
      ---------- END SOURCE ----------

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              • Assignee:
                alexsch Alexandr Scherbatiy
                Reporter:
                webbuggrp Webbug Group
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                Dates

                • Created:
                  Updated:
                  Resolved: