Java

Java / JDBC

• What is JDBC and how use it to connect to database: MySQL, PosgreSQL
  Java - JDBC
• Example of using JDBC to connect MySQL
  Connect to MySQL via JDBC connector
• Example of using JDBC to connect MySQL and PostgreSQL
  Connect to MySQL and PostgreSQL via JDBC connector

Java / File class

• Creating new file in Java
  Java / Create new file
• Deleting file or directory in Java
  Java / Delete file or directory
• How to check if file or directory exists in Java
  Java / Check if file or directory exists
• How to check if given name is name of file in Java
  Java / Check if file is file or not
• How to check if given name is name of directoryin Java
  Java / Check if is directory
• Creating new directory in Java
  Java / Create new directory
• Read from file in Java
  Java / Read from file
• Writing to file in Java
  Java / Write to file

Java / Scanner class

• How to read from console using Scanner Class? Short example of reading from console.
  Scanner class. Simple example of Sanner.in

Java / Immutable objects

• Immutable objects in Java
  Java / immutable objects - example: String object

Java / Other

• Few ways of initializing variables
  Java / Initialization of variables
• Enum type. What is that and how to use it
  Java / Enum type
• References and passing object to the method. Objects in Java are passed by reference and primitive types are passed by value.
  Java - references and passing object to the method
• Serialization and deserialization objects in Java
  Java / serialize and deserialize object
• Java - for and for each loop - short example
  Java - for and for each loop
• Difference between break and continue statement
  Java / break and continue statements
• HashMap example and iterating through HashMap. Storing object in HashMap
  Java - HashMap example and iterating through HashMap
• Final field, method and class in Java. What you can do and can't do
  Java final field, method and class
• Inner classes, static nested classes
  Java / Inner classes
• Access to members od class (modifiers of fields, methods - public, private, protected or no-modifier)
  Java / field, method: modifiers
• Comparing to Strings (objects). The operator "==" vs equals() method
  Java / String equals() vs "=="
• Polymorphism - what is that and how to use it
  Java / Polymorphism
• Exceptions in Java
  Java / Exceptions
• Java keywords
  Java keywords - words, that cannot be used in Java as identifiers
• Java EE / Deployment Descriptor
  Java EE / Deployment descriptor (web.xml)