Here you can find the source of serializeObject(OutputStream out, Object o)
public static void serializeObject(OutputStream out, Object o) throws IOException
//package com.java2s; /*//from w ww. j a va2s . co m * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.ObjectOutputStream; import java.io.OutputStream; public class Main { public static byte[] serializeObject(Object o) throws IOException { try (ByteArrayOutputStream baos = new ByteArrayOutputStream(); ObjectOutputStream oos = new ObjectOutputStream(baos)) { oos.writeObject(o); oos.flush(); return baos.toByteArray(); } } public static void serializeObject(OutputStream out, Object o) throws IOException { ObjectOutputStream oos = new ObjectOutputStream(out); oos.writeObject(o); } }