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JPA 1 - Module 4: Object Oriented Programming

Notes: https://javajee.com/book/java-core-object-oriented-programming

Topic 1: Inheritance

  1. Create class Abc in a package with a protected variable. Create another class Def in another package extending the class Abc and print the value of inherited protected variable.

Question sets:

With answers: set-20set-22 [node:read-more:link]

JPA 1 - Module 3: Operators, Decision and Looping Constructs

Notes: 

https://javajee.com/book/java-core-operators-decision-and-looping-constr...

Exercises

Module 3.1: Operators and scopes

  1. Program with instance variable and local variable.

    1. Write a program with an instance variable and local variable with same name.

    2. Assign different values along with their declarations.

JPA 1 - Module 2: Java Core - Classes, Objects, Variables and Methods

Notes: 

https://javajee.com/book/java-core-classes-objects-variables-and-methods

Module 2.1: Data Types and Variables

Exercises

  1. Write a program with static, instance and local variables.

    1. Write a class that has 2 variables of type int: myStaticVar, myInstanceVar and myLocalVar as a static instance and local variable respectively.

JPA 1 - Module 1: Java Essentials

Notes: 

https://javajee.com/book/java-101-getting-started-with-java

Excercises

  1. Write a HelloWorld program. Write a simple program with a main method that prints Hello World.

  2. Use package and import statement.

    1. Create a class Hello1 that is part of a package com.javajee.package1.

      1. Add the standard main method that will be invoked by JVM.

How to install and use multiple versions of Java in MacOS

Install different versions of JDK and JRE in local and switch between them easily.

Go to below jdk 14 downloads page at the URL https://www.oracle.com/java/technologies/javase/jdk14-archive-downloads.html. You can also reach this page by searching in google for the same. 

Click on the download symbol corresponding to your installer. Here it is macOS Installer.

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