Java Tutorial

Welcome to Net-informations Java Tutorial . This tutorial is directed mainly towards beginning Java programmers, although it might also be useful for experienced Java programmers who want to learn something more about Java Language .
Java tutorial for beginners
Java is an object-oriented language derived from C++ with strong support for networking, multithreading, and component-oriented development. The first version of JDK ( Java Development Kit ) 1.0, released in 1995, established the first major public Java standard, with a C++ like syntax and a hierarchy of classes including support for networking, streams, event handling, exception handling, multithreading, and GUI development with the Abstract Windowing Toolkit (AWT). Soon afterwards the Java Database Connectivity(JDBC) classes were introduced as a means of communicating with databases. Unlike other programming languages like C or C++ , though, Java programs are not compiled into machine code; instead, they are converted into an architecture-neutral bytecode format. This collection of bytes represents the code for an abstract Java virtual machine (JVM). In order for these bytes to execute on a physical machine, a Java interpreter running on that physical machine must translate those bytes into local actions, such as printing a string or drawing a button. Java Help Java Source code

I hope this Java tutorial helps you overcome some of the problems you are likely to hit when you first start developing in Java. If you have any suggestions or advice for how this page could be improved, feel free to contact me.


  Java Tutorial for Beginners
  1. What is Java
  2. Why Choose Java
  3. Java is Platform neutral
  1. What is Java virtual machine?
  2. First java Program

  Java Fundamentals
  1. Java Path and Java ClassPath
  2. Java Basic Datatypes
  3. Type Casting in Java
  1. Java Autoboxing and Unboxing
  2. Access modifiers in java
  3. What are Java enums and why are they useful?
  4. what is the meaning of public static void main(string[] args)
  5. Formatting Output with printf() in Java

  Java Control Structures
  1. Java if-else statement
  2. Java for loop
  3. How to while loop and do..while loop in Java
  1. How to Java Switch Statement
  2. Java break and continue statement
  3. Exception Handling in Java
  4. How to Throw Exceptions in Java
  5. Java Programming for Beginners

  Java Collections
  1. Java ArrayList Operations
  2. HashMap in Java
  3. Hashtable in Java
  1. TreeMap in Java
  2. Java LinkedList Operations
  3. Vector in Java
  4. Java HashSet Class
  5. Treeset in Java
  6. Pair Class in Java
  7. Java Record Class

  Java String Class
  1. How to Get the Length of a String
  2. Java String charAt() Method
  3. String indexOf() method
  1. Java String replace()
  2. Java String contains()
  3. String Comparison in Java
  4. Java String substring()
  5. Java String concat() Method
  6. Java String split() method
  7. Convert String to int
  8. Java StringBuilder Class
  9. StringTokenizer in Java
  10. How to convert int to String in Java?

  Java File Class
  1. How to create a file in Java
  2. InputStreamReader Class
  3. OutPutStreamWriter Class
  1. BufferedReader Class
  2. BufferedWriter Class
  3. FileReader Class
  4. FileWriter Class
  5. RandomAccessFile in Java
  6. Reading/Writing Objects
  7. Java Scanner class
  8. List all files in a folder

  Learn Java Programming
  1. Java Program to Check Leap Year
  2. Palindrome Program in Java
  3. Prime Number Program in Java
  1. How to Connect MySQL Database in Java
  2. Can you overload main() method in Java?
  3. Why there are no global variables in Java?

  Java Network Programming
  1. How to find your IP address and computer/host name
  2. How to open and read from a URL in Java
  3. Java Socket Programming
  1. Multithreaded Socket Programming in Java?

  Java Errors and Exceptions
  1. Reached end of file while parsing
  2. Unreachable statement error in Java
  3. Int Cannot Be Dereferenced Error - Java
  1. How to fix java.lang.classcastexception
  2. How to fix java.util.NoSuchElementException
  3. How to fix "illegal start of expression" error
  4. How to resolve java.net.SocketException: Connection reset
  5. Non-static variable cannot be referenced from a static context
  6. Error: Could not find or load main class in Java
  7. How to Handle OutOfMemoryError in Java
  8. How to resolve java.net.SocketTimeoutException
  9. How to handle the ArithmeticException in Java?

  Java Interview Questions
  1. Java Interview Questions-Core Faq - 1
  2. Java Interview Questions-Core Faq - 2
  3. Java Interview Questions-Core Faq - 3
  1. Important features of Java
  2. Difference between Java and JavaScript?
  3. What is the difference between JDK and JRE?
  4. What gives Java its 'write once and run anywhere' nature?
  5. What is JVM and is it platform independent?
  6. What is Just-In-Time (JIT) compiler?
  7. What is the garbage collector in Java?
  8. What is NullPointerException in Java
  9. Difference between Stack and Heap memory in Java
  10. How to set the maximum memory usage for JVM?
  11. What is numeric promotion?
  12. Why do we need Generic Types in Java?
  13. What does it mean to be static in Java?
  14. What are final variables in Java?
  15. How Do Annotations Work in Java?
  16. How do I use the ternary operator in Java?
  17. What is instanceof keyword in Java?
  18. How ClassLoader Works in Java?
  19. What are fail-safe and fail-fast Iterators in Java
  20. What are method references?
  21. "Cannot Find Symbol" compile error
  22. Difference between system.gc() and runtime.gc()
  23. How to convert TimeStamp to Date in Java?
  24. Does garbage collection guarantee that a program will not run out of memory?
  25. How setting an Object to null help Garbage Collection?
  26. How do objects become eligible for garbage collection?
  27. How to calculate date difference in Java
  28. Difference between Path and Classpath
  29. Is Java "pass-by-reference" or "pass-by-value"?
  30. Difference between static and nonstatic methods java
  31. Why Java does not support pointers?
  32. What is package in Java?
  33. What are wrapper classes?
  34. What is singleton class in Java?
  35. Difference between Java Local Variable, Instance Variable and a Class Variable?
  36. Can a top level class be private or protected in java
  37. Are Polymorphism , Overloading and Overriding similar concepts?
  38. How to Use Locks in Java
  39. Why Multiple Inheritance is Not Supported in Java
  40. Why Java is not a pure Object Oriented language?
  41. Why can't a Java class be declared as static?
  42. Difference between Abstract class and Interface in Java
  43. Why do I need to override the equals and hashCode methods in Java?
  44. Why does Java not support operator overloading?
  45. What’s meant by anonymous class in Java?
  46. Static Vs Dynamic class loading in Java
  47. Why am I getting a NoClassDefFoundError in Java?
  48. How to generate random integers within a specific range in Java
  49. What's the meaning of System.out.println in Java?
  50. What is the purpose of Runtime and System class?
  51. What is finally block in Java?
  52. What is difference between final, finally and finalize?
  53. What is try-with-resources in java?
  54. What is a stacktrace?
  55. What is the meaning of immutable in terms of String?
  56. What are different ways to create a string object in Java?
  57. Difference between String and StringBuffer/StringBuilder in Java
  58. What is the difference between creating String as new() and literal?
  59. How do I convert String to Date object in Java?
  60. How do I create a Java string from the contents of a file?
  61. What actually causes a StackOverflow error in Java?
  62. Why is char[] preferred over String for storage of password in Java
  63. What is I/O Filter and how do I use it in Java?
  64. Serialization and Deserialization in Java
  65. Understanding transient variables in Java
  66. What is Externalizable in Java?
  67. What is the purpose of serialization/deserialization in Java?
  68. What is the Difference between byte stream and Character streams
  69. How to append text to an existing file in Java
  70. Read/convert an InputStream to a String in Java
  71. What is the difference between Reader and InputStream in Java
  72. Introduction to Java threads
  73. What is synchronization Java?
  74. Static synchronization Vs non static synchronization in Java
  75. Java Thread Deadlock Tutorial
  76. What is Daemon thread in Java
  77. Difference between implements Runnable and extends Thread in Java
  78. What is the volatile keyword in Java
  79. What are the basic interfaces of Java Collections Framework
  80. What are the differences between ArrayList and Vector in Java
  81. What is the difference between ArrayList and LinkedList?
  82. What is the difference between List and Set in Java
  83. Difference between HashSet and HashMap in Java
  84. Difference between HashMap and Hashtable in Java?
  85. How does the hashCode() method of java works?
  86. Difference between capacity() and size() of Vector in Java
  87. What is a Java ClassNotFoundException?
  88. How to fix java.lang.UnsupportedClassVersionError