Can we convert long to byte?
Java provide ByteBuffer class to do the same.to convert any byte array, first we need to allocate 8 bytes using ByteBuffer’s static method allocate, then put byteArray using put method and flip bytebuffer. by calling getLong() method we can get long value of that byte array.
Can long be converted to byte in Java?
In Java, a byte can contain only values from -128 to 127, if we try to cast a long value above or below the limits of the byte then there will be a precision loss. 1. byte: The byte data type is an 8-bit signed two’s complement integer.
How do you serialize an object to byte array?
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.
Is byte array serializable in Java?
serialize() : Serializes an object to a byte[] array. It takes the object to be serialized as input and returns a byte[] array. deserialize() : Deserializes a single Object from an array of bytes. It takes the serialized object as input (which must not be null) and returns the deserialized object.
Can we convert long to float in Java?
Conversion of an int or a long value to float, or of a long value to double, may result in loss of precision-that is, the result may lose some of the least significant bits of the value.
How many bytes is a long?
8 bytes
64-bit UNIX applications
| Name | Length |
|---|---|
| char | 1 byte |
| short | 2 bytes |
| int | 4 bytes |
| long | 8 bytes |
What is the max value of long in Java?
long: The long data type is a 64-bit two’s complement integer. The signed long has a minimum value of -263 and a maximum value of 263-1. In Java SE 8 and later, you can use the long data type to represent an unsigned 64-bit long, which has a minimum value of 0 and a maximum value of 264-1.
How do you long a string in Java?
Let’s see the simple example of converting long to String in java.
- public class LongToStringExample2{
- public static void main(String args[]){
- long i=9993939399L;
- String s=Long.toString(i);
- System.out.println(s);
- }}
What is Java ObjectOutputStream?
An ObjectOutputStream writes primitive data types and graphs of Java objects to an OutputStream. The objects can be read (reconstituted) using an ObjectInputStream. Persistent storage of objects can be accomplished by using a file for the stream. The method writeObject is used to write an object to the stream.
How do I fix Java IO NotSerializableException?
How to deal with the NotSerializableException
- The simplest solution is to find the class that throws the exception and makes it implement the Serializable interface.
- In case the class refers to non-serializable objects and these objects should not be serialized, then, you can declare these objects as transient.
What is byte stream in serialization?
Serialization in Java : Java Serialization is the mechanism in which the state of an object is converted to a byte stream so that the byte stream can be reverted back into the copy of the object written into a file or stored into a database. A stream is simply a sequence of data elements.