[Octave-bug-tracker] [bug #42112] Unable to load Java objects from MAT file

[Rik]

Follow-up Comment #5, bug #42112 (project octave):

Just for fun I tried to see if I could load and save Java objects using Java's
Serializable methods.  It worked fine.  It would be nice to have Octave
implement this for load_binary/save_binary in ov-java.cc.  I used


x = javaObject ('java.lang.Double', pi)
fout = javaObject('java.io.FileOutputStream', '/tmp/blah.ser')
sout = javaObject ('java.io.ObjectOutputStream', fout)
sout.writeObject (x)
sout.close ()
fin = javaObject('java.io.FileInputStream', '/tmp/blah.ser')
sin = javaObject ('java.io.ObjectInputStream', fin)
xin = sin.readObject
xin
sin.close ()
fin = javaObject('java.io.FileInputStream', '/tmp/blah.ser')
sin = javaObject ('java.io.ObjectInputStream', fin)
xin2 = javaObject ('java.lang.Double', sin.readObject())
xin2.toString


The first time I read the object it just returned a double of 3.1416. I think
this is probably caused by Octave auto-converting the result from a Java
object to a double. The second time I called the Java constructor with the
results of the readObject call and it returned a true Java object with the
full value of pi. 

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