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  1. JDK
  2. JDK-4448605

readBoolean, readByte, readUnsignedByte throw unexpected EOFException

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    • Subcomponent:
    • Resolved In Build:
      beta2
    • CPU:
      generic
    • OS:
      generic
    • Verification:
      Not verified

      Description



      Name: vpR10011 Date: 04/19/2001



      Specifications of the following methods from the class
      javax.imageio.stream.ImageInputStreamImpl:

      readBoolean()
      readByte()
      readUnsignedByte()

      say nothing about throwing EOFException.

      But these methods throw EOFException if the stream reaches the end
      before reading all the bytes.


      To reproduce this bug run the following test:
      ---------------------test.java--------------
      import java.io.*;
      import javax.imageio.stream.*;

      public class test {
          public static void main(String[] argv) {
              byte [] bar = new byte[0];
              InputStream is = (InputStream) new ByteArrayInputStream(bar);
              ImageInputStreamImpl iisI = (ImageInputStreamImpl) new MemoryCacheImageInputStream(is);
              System.out.println("readBoolean");
              try {
                  boolean b = iisI.readBoolean();
                  System.out.println("Passed");
              } catch (Exception e) {
                  System.out.println("Failed: unexpected exception " + e);
              }
              System.out.println("readByte");
              try {
                  byte b = iisI.readByte();
                  System.out.println("Passed");
              } catch (Exception e) {
                  System.out.println("Failed: unexpected exception " + e);
              }
              System.out.println("readUnsignedByte");
              try {
                  int b = iisI.readUnsignedByte();
                  System.out.println("Passed");
              } catch (Exception e) {
                  System.out.println("Failed: unexpected exception " + e);
              }
          }
      }
      -------------------log----------------------
      % java -version
      java version "1.4.0-beta"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b60)
      Java HotSpot(TM) Client VM (build 1.4.0-beta-b60, mixed mode)
      % java test
      readBoolean
      Failed: unexpected exception java.io.EOFException
      readByte
      Failed: unexpected exception java.io.EOFException
      readUnsignedByte
      Failed: unexpected exception java.io.EOFException


      This bug causes failure of the new JCK tests
      api/javax_imageio/stream/ImageInputStreamImpl/index.html#readBoolean
      api/javax_imageio/stream/ImageInputStreamImpl/index.html#readByte
      api/javax_imageio/stream/ImageInputStreamImpl/index.html#readUnsignedByte

      ======================================================================

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            Assignee:
            dricesunw Daniel Rice (Inactive)
            Reporter:
            verapsunw Verap Verap (Inactive)
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