java

1. data type

1.1. primitive

1.1.1. boolean

1.1.2. char

1.1.3. float

1.1.4. int

1.2. non-primitive

1.2.1. array

1.2.2. string

1.2.3. classes

2. Applications

2.1. gaming

2.2. mobile applications

2.3. business

2.4. Enterprise application

3. features

3.1. Secure

3.2. Simple

3.3. Portable

3.4. Multithreaded

4. Operators

4.1. arithemtic operators

4.2. java assignment operators

4.3. java logical operators

4.4. Bitwise operators