What is the default value of byte datatype in Java?

In Java, the default value of the byte datatype is 0. This applies when a byte variable is declared but not explicitly initialized. For example:

byte myByte;
System.out.println(myByte); // This will cause a compilation error if you try to print it without initialization.
 
However, if you declare it within a class and don't initialize it, it will default to 0:

class Example {
   byte myByte; // Defaults to 0
   void display() {
       System.out.println(myByte); // Outputs: 0
   }
}
 
In this case, myByte will have a default value of 0 when the object of the class is created.