Java programs can create, store, and operate two types: basic type and class type (referred to as class). Basic Type (8 types): Digital Type: Byte, Short, Int, Long, Float, Double Character Type: CHAR Boolean: Boolean standard Java class has more than 1,500, like string, button, point, and more. The operation defined for special classes is called a method (Method). 2.4.1 Variable Variables is also an identifier for reference the saved data value in the computer. 2.4.2 Initialization of Variables In addition to String, Java is not used to create characters constants for objects.
