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How to convert an object to byte array in java?
To convert an object to byte array
- Make the required object serializable by implementing the Serializable interface.
- Create a ByteArrayOutputStream object.
- Create an ObjectOutputStream object by passing the ByteArrayOutputStream object created in the previous step.
- Write the contents of the object to the output stream using the writeObject() method of the ObjectOutputStream class.
- Flush the contents to the stream using the flush() method.
- Finally, convert the contents of the ByteArrayOutputStream to a byte array using the toByteArray() method.
Example
import java.io.ByteArrayOutputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
class Sample implements Serializable {
public void display() {
System.out.println("This is a sample class");
}
}
public class ObjectToByteArray {
public static void main(String args[]) throws Exception {
Sample obj = new Sample();
ByteArrayOutputStream bos = new ByteArrayOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(bos);
oos.writeObject(obj);
oos.flush();
byte [] data = bos.toByteArray();
}
}
Updated on: 19-Feb-2020
15K+ Views
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