reflection - Serializing java.lang.class -

i have problem persisting class object in db.

i tried convert object byte array using object objectarrayoutputstream , bytearrayoutputstream shown below , persisted byte array:

class klazz = getclassforclassdef(); bytearrayoutputstream baos = new bytearrayoutputstream(); objectoutputstream oos = new objectoutputstream(baos); oos.writeobject(klazz); baos.tobytearray(); 

but error shown below:

java.lang.classformaterror: incompatible magic value 2901213189 in class file 

i think way byte array constructed has problem. don't know how create correct .class equivalent of class object.

if trying store class itself:

you can read more here: https://stackoverflow.com/a/2390763/1001027

if trying store object:

you using class parameter writeobject method. instead of should use instance have.

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// write class bytearrayoutputstream baos = new bytearrayoutputstream(); objectoutputstream oos = new objectoutputstream(baos); oos.writeobject(objecttoserialize); // need store byte[] data = baos.tobytearray(); // read again (just test) bytearrayinputstream bais = new bytearrayinputstream(data); object restored = new objectinputstream(bais).readobject(); // write came deserialization system.out.println(restored); 

in sample, variable objecttoserialize hold object store.

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are sure want store java serialized objects database? there few alternatives that. create formal model using orm framework such hibernate.

if think dynamic, use xml serialization such xstream or json serialization, because readable formats, meaning can see stored, avoiding need deserialize java application check state.