2.Java Boolean Type part - 1

With a boolean, we can branch without specifying true or false. By default, an if-statement compares against true. With a negation, we test for false.
This example program uses the literal constants true and false. Often we assign a boolean to true or false as we declare it. Here we test for truth in two ifs.
True:
The program first assigns the boolean of name "value" to true. The if-statement then detects "value" is true.
False:
We then set the same boolean variable to false. Now the !value test evaluates to true, so the "B" is printed.

Primitive types are the most basic data types available within the Java language. There are 8: boolean, byte, char, short, int, long, float and double. These types serve as the building blocks of data manipulation in Java. Such types serve only one purpose — containing pure, simple values of a kind. Because these data types are defined into the Java type system by default, they come with a number of operations predefined. You can not define a new operation for such primitive types. In the Java type system, there are three further categories of primitives:

Numeric primitives: short, int, long, float and double. These primitive data types hold only numeric data. Operations associated with such data types are those of simple arithmetic (addition, subtraction, etc.) or of comparisons (is greater than, is equal to, etc.)
Textual primitives: byte and char. These primitive data types hold characters (that can be Unicode alphabets or even numbers). Operations associated with such types are those of textual manipulation (comparing two words, joining characters to make words, etc.). However, byte and char can also support arithmetic operations.
Boolean and null primitives: boolean and null.