Question

I was trying to save one of the class object to a File using ObjectOutputStream. When My object grows with the size I get the below error otherwise it is all good.

Exception in thread “Thread-2” java.lang.OutOfMemoryError: Java heap space
at java.io.ObjectOutputStream$HandleTable.growEntries(ObjectOutputStream.java:2308)

My code looks like this:

 try {
        FileOutputStream fout = new FileOutputStream("D:\\out.dat");
        ObjectOutputStream os = new ObjectOutputStream(fout);
        os.writeObject(this.obj);  // Writing object to a File

        os.close();
        fout.close();
        os=null;
        fout=null;
    } catch (Exception e) {
        e.printStackTrace();
    }

Please suggest me how can I resolve this? Any alternate approach to achieve the same?

Answer 1

Start your program with the -Xms1024M -Xmx1024M options. You don’t usually get that error unless that object is really really big and/or you have a computer with a small RAM amount.