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  1. JDK
  2. JDK-8036932

Graphics.drawOval creates unusual shapes when given large coordinates

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    • 2d
    • x86_64
    • windows_7

      FULL PRODUCT VERSION :
      java version "1.7.0_09"
      Java(TM) SE Runtime Environment (build 1.7.0_09-b05)
      Java HotSpot(TM) Client VM (build 23.5-b02, mixed mode, sharing)

      ADDITIONAL OS VERSION INFORMATION :
      Microsoft Windows [Version 6.1.7601]


      A DESCRIPTION OF THE PROBLEM :
      Graphics.drawOval creates unusual shapes when given particularly large coordinates i.e. an x-value such as 150,000,000.

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      On a JPanel, draw an oval with an x or y position of 150000000. Adjust the application so that the user can see the oval.

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      An oval shape should be rendered on screen,
      ACTUAL -
      An egg shape is rendered on screen,

      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      package funky;

      import java.awt.Color;
      import java.awt.Dimension;
      import java.awt.Graphics;

      import javax.swing.JFrame;
      import javax.swing.JPanel;
      import javax.swing.JScrollPane;

      public final class OddOval {

      private OddOval() {}

      public static void main(String[] args) {
      JFrame frame = new JFrame();
      frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

      final int ovalX = 150000000;

      JPanel panel = new JPanel() {

      @Override
      public void paint(Graphics g) {
      super.paint(g);
      g.drawOval(ovalX, 0, 30, 30);
      }

      };
      panel.setPreferredSize(new Dimension(ovalX + 50, 2000));
      panel.setBackground(Color.WHITE);
      JScrollPane scroll = new JScrollPane(panel, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
      frame.add(scroll);

      frame.setPreferredSize(new Dimension(500, 500));
      frame.pack();
      frame.setLocationRelativeTo(null);
      frame.setVisible(true);

      scroll.getHorizontalScrollBar().setValue(scroll.getHorizontalScrollBar().getMaximum());
      }

      }

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

            prr Philip Race
            webbuggrp Webbug Group
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              Created:
              Updated: