原始较小我有它接受一个对象,并把它变成一个字节数组的函数:阵列的比原始对的ObjectOutputStream
public static byte[] serialize(Object obj) throws IOException {
try(ByteArrayOutputStream b = new ByteArrayOutputStream()){
try(ObjectOutputStream o = new ObjectOutputStream(b)){
o.writeObject(obj);
}
return b.toByteArray();
}
}
当我使用上的原始类型此功能,输出最终被大于相同基元的单一数组。
public static void main (String[] args) throws java.lang.Exception
{
System.out.format("byte single: %d, array: %d\n",
serialize((byte) 1).length, serialize(new byte[]{1}).length);
System.out.format("short single: %d, array: %d\n",
serialize((short) 1).length, serialize(new short[]{1}).length);
System.out.format("int single: %d, array: %d\n",
serialize((int) 1).length, serialize(new int[]{1}).length);
System.out.format("float single: %d, array: %d\n",
serialize((float) 1).length, serialize(new float[]{1}).length);
System.out.format("double single: %d, array: %d\n",
serialize((double) 1).length, serialize(new double[]{1}).length);
}
这将产生:
byte single: 75, array: 28 short single: 77, array: 29 int single: 81, array: 31 float single: 79, array: 31 double single: 84, array: 35
这到底是怎么回事?为什么数组更小?这是一个Ideone for the issue