Java

1. Data tybes

1.1. Primtiv

1.1.1. integer

1.1.2. floating point

1.1.3. character

1.1.4. Boolean

1.2. NON-Primitive

1.2.1. Classes

1.2.2. Interfaces

1.2.3. Arrays

1.2.4. Strings

2. Features

2.1. Object Oriented

2.2. Architecture-neutral

2.3. High Performance

2.4. Dynamic

3. Operators

3.1. Arithmetic Operators

3.1.1. +

3.1.2. -

3.1.3. /

3.2. Logical Operators

3.2.1. &&

3.2.2. ||

4. Application

4.1. Desktop GUI Applications

4.2. Mobile Applications

4.3. Web Applications

4.4. Scientific Applications

5. Java method

5.1. Access Modifiers

5.2. Method Name

5.3. Method Parameters

6. Constructor in Java

6.1. Default Constructor

6.2. No-Args constructor

6.3. Parameterized constructor