Data Types Data types in Java are classified in to types: Primitive - which include Integer, Character, Boolean and Floating Point Non-primitive - which includes Classes, Interfaces and Arrays Integer : byte 1 byte short 2 bytes int 4 bytes long 8 bytes Floating Point : number + fractional parts float double Character : stores character Boolean : hold true false value Variables Instance Variables (non-Static Fields) - Objects store their individual states in “non-static fields”, that is, fields declared without the static keyword. Class Variables - Static Fields - any field with static modifier says that there is only one copy of this variable in existence static int myClassVariable = 6; Local Variables - a method stores it's temporary state of local variables int count=0; Parameters - variables which will be passed to the methods of a class
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