Java for Beginners – Step by Step

Java for Beginners – Step by Step

Understand the basics of Java

What you’ll learn

  • Understand how java works

  • Install and use java

  • Understand and use object oriented programming concepts

  • Write java programs on eclipse and other IDEs
Requirements
  • No specialized knowledge is required
  • Basic knowledge on how to use computer is enough

Today we will learn:

1. What is JAVA
2. A simple architecture of java
3. IDE for Java (to write java programs)

1. Java is a programming language
 Sun Microsystems
 James Gosling – 1991 – 1995

2. Architecture : Platform independent

3. IDE for java – integrated development environment

Step 1: check if java is already installed 

              java -version

Step 2: download java from internet

http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

Step 3: Run the java exe

Step 4: Setting environment variables

Step 5: check if java is installed and available

Today we will learn

1. How to setup and install java on mac os
2. How to setup Java env variables
3. How to change/switch java version on your system

Step 1 : check if java is installed 
   Terminal : java -version
     : javac -version

Step 2 : download and install java
http://www.oracle.com/technetwork/java/javase/downloads/index-jsp-138363.html

Step 3 : How to set java env variable  – JAVA_HOME
   echo $JAVA_HOME
   setting JAVA_HOME
   setting JAVA_HOME in .bash_profile

Step 4 : How to switch java version
 export JAVA_HOME=`/usr/libexec/java_home -v 1.8`

Today we will learn

1. How to download eclipse
2. Getting ready for java programming

IDE – integrated development environment

Step 1 : download eclipse

Step 2 : unzip – start eclipse – provide workspace location

Step 3 : Open workbench

Today we will learn

1. Create and Run first java program
2. Compile and Run

Step 1 : Open Eclipse – select workspace

Step 2 : Create Java Project – create package – create Class

Step 3 : Create a Java program

Step 4 : Compile and Run

Today we will learn

1. How to compile and run java program from command line

Step 1 : goto command line / terminal – goto the location of java file

Step 2 : Compile java program
   javac “name of java file”

Step 3 : Execute java program
   java “name of java file without extension”

Today we will learn

1. What is JAR
2. Why do we need JAR files
3. How to create JAR file from Java Project
4. How to extract contents from a JAR file (Java Decompiler)
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JAR = Java Archive
  – compressed format of a compiled java project
  – contains .class files + meta data and some other resources
  – used to distribute java code/libraries for use by other projects
  – direct execution of java program (w/o IDE)

e.g. javamail jar

Today we will learn:

Basics of JDK, JRE and JVM:
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JDK : Java Development Kit
  env to develop, compile and run java application

JRE : Java Runtime Environment
  env to run java applications

JVM : Java Virtual Machine
  interpreter to execute java programs (byte code)  line by line
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JVM =  executes precompiled java programs (.class , .jar files / bytecode)

JRE =  JVM + Libraries to run java program

JDK =  JRE + Tools to develop java programs

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Today We Will Learn:

1. What is Object Oriented Programming (OOP)
2. How did OOP came into existence
        – Non-Structured Programming
        – Structured Programming
        – OOP – Object Oriented Programming
3. Understand OOP with Real Life Examples

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We will understand:
Examples of Object Oriented Programming
Classes and Objects
How can you relate OOP with real life entities

Easy and interesting way of learning Object Oriented Programming with examples

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Today we will learn:

1. Convert information into tables
2. Create Class and variables using tables
3. Create Objects
4. Run the OO(Object Oriented) program
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Step 1 : Represent Account Holder details in a simple table

Step 2 : Create a Java Class with name as TableName and Variables as column names

Step 3 : Create another class where we will create objects for Account Holder class

Step 4 : Create objects for Tom, Henry and Sarah and provide details as below

Step 5 : Run and validate

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Today we will learn…

What is exception handling

How to implement exception handling in project

What is exception handling

Exception

unexpected condition at runtime

Exception Handling

Handling any unexpected behavior during execution

Catch the exception and log messages for troubleshooting

Enables continuation of runs even if a test fails

Description

If you want to understand the basics of java in an easy and fun way, this course is for you.

You will learn:
1. What is Java
2. How to install Java
3. How to write first Java Program
4. Understand what is JRE, JDK, JVM and JAR
5. Understand and implement Object Oriented Concepts

We will have fun learning java.
Let’s Get Started 

Who this course is for:
  • Anyone who wants to understand basic concepts of Java
  • Anyone who want to learn the basics of java

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