The title is a lie. This concept, however, is a in . Go ahead and grab a cup of Java, before we dive into the concept of primitive data types. primitive concept Java Boolean, char, byte, short, int, long, float, and double are all primitive data types in Java. These are all words that Java knows. These values are stored in the , as opposed to the . Variables that are on the stack are accessible directly from memory, and can run very fast. Objects are on the heap, and take more time to access. stack heap Every primitive type in Java has a wrapper class. has short Short has int Integer has long Long has boolean Boolean has char Character has float Float has double Double has byte Byte The wrappers have methods attached to them that the primitive types do not have. These include… Image from tutorialspoint.com Image from tutorialspoint.com Image from tutorialspoint.com Wrapper classes are primitives are also stored differently in memory. The wrapper classes are stored on the as a reference to an object on the . stack heap class PrimitivePost{public static void main(String args[]){//declearing a boolean, this returns true or falseboolean t = true;// declaring characterchar a = ‘G’;// declaring bytebyte b = 4;// declaring shortshort s = 56; // declaring intint i=89;//declaring a longlong l = 244843984;// declaring a float — for float use ‘f’ as suffixfloat f = 4.7333434f; // declaring a double — default fraction value is double in javadouble d = 4.355453532; System.out.println(“boolean: “ + t);System.out.println(“char: “ + a);System.out.println(“byte: “ + b);System.out.println(“short: “ + s);System.out.println(“int: “ + i);System.out.println(“long: “ + l);System.out.println(“float: “ + f);System.out.println(“double: “ + d);}}
