Unit 1(one) Introduction To Java || BCA Third Semester || Oops In Java|| Notes

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BCA Third Semester Oops in Java Subject, Unit one or Chapter one Complete Notes Pdf Downloadable Link are Given Below.

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Introduction To Java

Fundamentals of java Programming

• Computers and Computer Programming
• Writing and Executing a Java Program
• Elements of a Java Program
• Features of Java
• Accessing the Classes and Class Members
• The Memory Usage by a Java Program
• When Will the Error Occur?

Learning Objectives

• Understand how computers and computer programs work.
• Understand how a Java program is written, compiled, and executed.
• Understand what makes Java platform independent.
• Identify the object-oriented features of Java.
• Identify different elements of a Java program: primitive variable, reference variable, local variable, instance variable, method, and class.
• Identify where in memory the method invocations, objects, and variables are stored.
• Understand how access modifiers define the accessibility of classes and class members.
• Understand the concepts of early binding and late binding in the context of program errors.

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 Computers and Computer Programming

• How a Computer Works
• How a Computer Program Works

   How a Computer Works

• From a computer program’s perspective, a computer consists of components to do the following:
• Receive data from a user
• Process the data according to instructions from a program or a user
• Place the results somewhere
• Places to Store Data:

1. Permanent storage: hard drive
2. Temporary storage: RAM

• I/O Devices: monitor, keyboard, disk, and
• printer
• CPU: The Brain of the Computer

Writing and Executing a Java Program

• A compiler translates a program in C/C++ to a binary format called executable code
• The executable code is machine dependent
• Java programs are machine independent, thanks to Java virtual machine (JVM).
• Writing a Java Program
• Compiling a Java Program
• Executing a Java Program