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Java Tutorial

This Java Tutorial provides step-by-step tutorials on the basics to advanced topics of Java programming language.

This tutorial on Java is helpful for the students, and developers as well. Follow the index (topics) to learn Java from the basics topics to the advanced topics.

Java Tutorial: Table of Contents

Java Tutorial: Getting Started with Java

Java Overview

• Explain JDK and JRE
• Why java is platform independent?
• How to set path in Java in Windows?
• Differences between path and classpath in java?
• How to run java class file which is in different directory?
• Why does java file name must be same as public class name?
• Differences between Heap and Stack Memory in Java?

Java Basics

• Java Comments: Types with Examples
• Is main() method compulsory in Java?
• Can we overload main() method in Java?
• Can we override main() method in Java?
• Java Bitwise Operators with Types and Examples
• Java Variables with Types and Examples
• Java Variables: Declaration and Initialization
• Java float Vs double Type: What's the difference?
• Java Typecasting with Types and Examples

Java Input/Output

• Printing the formatted text with printf in Java
• Java next() and nextLine() Methods (With Examples)
• Different ways to take input from the user in Java

Java Conditional Statements

• break statement in java

Java Control Statements

• for-each (enhanced for loop) in Java

Java Strings

• Common String Operations in Java
• Java - Getting a character by index from a string
• Java - Convert a character to string
• Convert Character Array to String in Java
• Java StringBuffer Class Example
• Java toString() Method
• Why string is immutable or final in java?
• Comparision of StringBuffer and StringBuilder
• How to add characters to a string in Java?
• How to check if string is number in java?
• How to add double quotes to a string in Java?
• Differences between StringJoiner and StringBuilder in Java
• What are different ways to create a string object in Java?
• Differences between concat() method and plus (+) operator in Java

Java Array & ArrayList

• How to declare and initialize an array in Java?
• Basic Array Operations in Java
• Java - Find maximum absolute difference in an array
• Java - Array and ArrayList Comparison
• Java ArrayList Class and Its Methods
• Java - Difference between ArrayList and LinkedList
• Java - Difference between Vector and ArrayList
• Java - Convert Array to ArrayList
• How to convert ArrayList to Array in Java?
• How to make an ArrayList read only in Java
• How to Reverse an ArrayList in Java
• How to Remove Duplicates from ArrayList in Java
• How to Synchronize an ArrayList in Java

Java Threads

• Explain life cycle of a thread in java
• Thread properties in java
• How To Create Java Threads
• Java Thread Synchronization – Explained With Examples
• Java - Differences Between Process and Thread
• Java - Differences Between User and Daemon Threads
• How To Create Daemon Thread in Java?
• What will happen if we don't override thread class run() method in java?
• How can we achieve Thread Safety in Java?
• Thread Scheduler and Time Slicing in Java
• Thread Pool in Java, How to Create It
• What is Multithreading in Java
• How to get and set name of a thread in Java?
• How to stop a thread in Java?
• Java - Thread wait() and sleep() Methods
• Use of Java Thread start() and run() Methods

Java OOPs Concepts

• Access specifiers in Java
• Object as an Argument in Java
• Different ways to create an object in Java
• Object as an Array in Java
• Why java is not pure object oriented programming language?
• Can we access private variable outside of the class in Java?
• Java Constructors with Examples
• Differences between constructors and methods in Java
• Java Inheritance: An Overview, Use, Keyword Used, and Example
• Java Inheritance: Important Terms and Implementations
• Java Inheritance Types (With Examples)
• Using final keyword with inheritance in Java
• Why java does not support multiple inheritances?
• Is it possible to have same data members in parent and child classes in Java?
• Polymorphism in Java with Example
• Abstract Classes in Java with Example
• Explain Inner class in java
• How to access inner class in Java?
• Java Interfaces with its properties, implementation and Example
• Interfaces used in Collection framework in Java
• Packages in Java
• Packages in Java (more...)
• How to make Singleton Class using static in Java?
• Disadvantages/ Limitations of Object Arrays in Java
• Compare Array and Collection in Java
• Marker Interface in Java
• What is static import in java?
• Java Reflection API to change the behavior of the class
• How to access MetaData Of a class using Java?
• Covariant return type in java
• What are the non access modifiers in Java?
• Can a class have an interface and can an interface have a class in Java?
• Can we define private and protected modifiers for the members in interfaces in Java?
• How to make a read-only class in Java?
• How to make a write-only class in Java?
• How to call a class from another class in Java?
• Differences between abstract class and interface?
• Differences between abstraction and encapsulation?

Java Keywords & Methods

• Java - this keyword/reference
• Final and static keywords in Java with Example
• this keyword and this() method in Java
• super keyword and super() method in Java
• Implementation of Methods of Math Class in Java
• Is it possible to use abstract and final both with a method in Java?
• Explain recursion in Java with an Example

Java Exception Handling

• Basics of Exception Handling In Java
• Different ways to print Exception message in Java
• Exception Handling with Example in Java
• Nested try-catch Blocks with Example in Java
• Handling Multiple Catch Clauses in Java
• Creating User Defined Exceptions in Java
• The try-with-resource statement in Java
• Examples on Exceptional handing in Java
• Exception with Scanner class and solution while taking input in Java
• Compare final, finally and finalize() in java
• Differences between Checked and UnChecked Exception in Java
• Is it necessary that each try block must be followed by a catch block in Java?
• How to avoid NullPointerException in Java?

Java File Handling

• Basics of File Handling in Java with Example
• What are java files?

Java AWT

• Java AWT Introduction
• Java AWT Label
• Java AWT Button
• Java AWT TextField
• Java AWT TextArea
• Java AWT Checkbox
• Java AWT CheckboxGroup
• Java AWT Choice
• Java AWT Frame
• Java AWT List
• Java AWT Canvas

Eclipse

• Start a java project in eclipse
• Implementing a java class in eclipse
• A JavaScript file in eclipse
• Servlet file in Eclipse Mars
• Dynamic Web project in eclipse

JDBC

• Create a table using JDBC in Java?
• Insert records through JDBC in Java?
• Display all records using JDBC in Java?
• Display particular record by a field using JDBC in Java?
• Delete a particular record using JDBC in Java?
• Edit a record using JDBC in Java?
• Insert a record with PreparedStatement using JDBC in Java?
• Search record by a field (salary) using JDBC in Java?
• Search record by a pattern using JDBC in Java
• Count number of records available in a MYSQL table using JDBC in java
• Search record with more than one field using JDBC in Java?
• Transaction Management in JDBC

Java Servlets (JSP)

• Design Registration Form using Servlets and Mysql using MVC Pattern
• JSP - How to use bean action tag with session scope?
• User Login System in Servlet and JSP by MVC pattern using MySQL
• Reading All parameter's values at a time in JSP
• jQuery Validation for JSP with Bootstrap Design
• Login Session using JSP
• Difference between POST and GET methods in JSP
• Expression Language in JSP
• Difference between FORWARD and INCLUDE request in JSP
• AJAX Request in JSP - An Example
• Comment Box design in Bootstrap using AJAX, MYSQL and JSP
• Page count implementation using JSP (Java Server Page)
• Introduction to JSTL (Java Standard Tag Library)
• CRUD Operations using JSP

Java Preparation

• Java Interview Questions & Answers
• Java MCQs
• Java Aptitude Questions & Answers
• Java Programs
• Java Find Output Programs

Java Miscellaneous

• How to detect the OS (operating system) name in Java?
• How to get the name of running Java VM in Java?
• How to get the vendor name of running Java VM in Java?
• How to get the version of running Java VM in Java?
• How to get the Java VM specifications in Java?
• Command Line Arguments in Java with Example
• Java Garbage Collection with Examples
• Run code in comments in Java
• Explain OutOfMemory Error in java
• Scanner class and its methods in Java
• Stack class in Collection Framework in Java
• Differences between HashMap and LinkedHashMap in Java
• Differences between Set and List interface in Java
• Differences between HashSet and HashMap class in Java
• Differences between HashSet and LinkedHashSet in Java
• Differences between Set and Map interface in Java
• Differences between List and Map interface in Java
• Differences between Hashtable and HashMap class in Java
• Differences between the reverse() and reverseOrder() in Java
• Differences between HashMap and TreeMap in Java
• How to convert an Iterator into Iterable in Java?
• How to convert Iterable to Collection in Java?
• Differences between Enumeration and Iterator in Java
• How to print elements of a Stream in Java 8?
• How to remove an entry from a Collection in Java?
• How to sort objects of the Collection in Java?
• BigInteger Class and BigDecimal Class in Java
• Wrapper Classes in Java with Example
• Differences between Abstract class and Concrete class
• How to generate random numbers within a range in Java?
• Types of Lists in Java
• Comparator in Java
• Vector Class in Java
• What is Deadlock, how to analyze and avoid it in java?
• Batch Processing In Java
• How to check if directory exists in Java?
• How to check an object is null in Java?
• What is null in Java?
• How to print elements of a Stream in Java 8?
• How to remove an entry from a Collection in Java?
• How to sort objects of the Collection in Java?
• Coin change problem and solution in Java
• Solution of minimum spanning tree problem in Java using Kruskal's Algorithm

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