Name: ooR10001 Date: 05/03/2000



javax.sound.sampled.LineEvent object could not be serialized,
because it has non-transient and non-static field 'type' of
non-Serializable class javax.sound.sampled.LineEvent.Type.
It caused a problem.
 
The test example to reproduce the bug:
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import java.io.FileOutputStream;
import java.io.ObjectOutputStream;
import javax.sound.sampled.AudioSystem;

public class test {

  public static void main(String[] args) {
    try {

        javax.sound.sampled.LineEvent obj =
            new javax.sound.sampled.LineEvent(
                AudioSystem.getLine(new javax.sound.sampled.Line$Info(
                javax.sound.sampled.Line.class)),
                javax.sound.sampled.LineEvent$Type.START, 0L);

        FileOutputStream ostream = new FileOutputStream("gold.tmp");
        ObjectOutputStream objos = new ObjectOutputStream(ostream);
        objos.writeObject(obj);
        objos.close();
        System.out.println("OKAY");

    } catch (java.io.IOException e) {
        e.printStackTrace();
    } catch (javax.sound.sampled.LineUnavailableException e) {
    }
  }

}
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Test output:

java.io.NotSerializableException: javax.sound.sampled.LineEvent$Type
        at
java.io.ObjectOutputStream.outputObject(ObjectOutputStream.java:1148)
        at
java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:366)
        at
java.io.ObjectOutputStream.outputClassFields(ObjectOutputStream.java:1841)
        at
java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:480)
        at
java.io.ObjectOutputStream.outputObject(ObjectOutputStream.java:1214)
        at
java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:366)
        at test.main(test.java:18)
<program hangs>
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