All class types are compatible to Object, for example, because all classes inherit implicitly from Object. Integer is not compatible to Float, however, because Float is not a superclass of Integer.

There are eight primitive data types in Java: byte, short, int, long, float, double, char, and boolean. Each primitive type has a fixed size and range of values.

Java’s short reserved word identifies the short integer type in source code. The integer type describes integers that are represented in 32 bits; it can accommodate integer values ranging from ...

As every Java developer knows, there are eight primitive types in Java: byte me = 5; short circuit = 10; int eresting = 30; long johns = 22; float sum = 41; double trouble = 99; char broiled = ‘a’; ...