Another name of global variable is "EXTERNAL VARIABLES".
No, threads do not share global variables by default. Each thread has its own copy of global variables, which means changes made to global variables in one thread do not affect the values in other threads.
The only disadvantage of a global variable is that you cannot directly encapsulate them. Other than that, there is no real disadvantage of global variables.
You can copy them into global variables in the main() function, then have your other functions access those global variables. Global variables should generally be avoided, however.
In a segment of memory, whose name is 'data segment'
Global variables are globally accessible. Java does not support globally accessible variables due to following reasons:The global variables breaks the referential transparencyGlobal variables creates collisions in namespac
Variables that are declared globally outside every program are called global variables.
Storing global data.
Global variables can be seen in all blocks of your program, when local variables are visible only within the block where it's declared.
They is not.
No.
There's no global variables in Java.
Only global/static variables are, local variables aren't.