Java: No Explicit Globals
Some languages, like Java, don't have global variables. In Java, all variables that are not local variables are fields of a class. Hence all variables are in the scope of either a class or a method. In Java, static fields (aka class variables) exist independently of any instances of the class and one copy is shared among all instances; hence static fields are used for many of the same purposes as global variables in other languages because of their similar "sharing" behavior.
Read more about this topic: Global Variable
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