Latest Blog Posts for javarevisited

• How to solve java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/test
  on Sep 3, 2016 in error and exception JDBC mysql
  The error "java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/test" occurs when you try to connect MySQL database running on your localhost, listening on port 3306 port from Java program but either you don't...
• Adapter Design Pattern in Java with Example
  on Aug 30, 2016 in design patterns java
  Adapter design pattern in Java, also known as the Wrapper pattern is another very useful GOF pattern, which helps to bridge the gap between two classes in Java. As per the list of Gang of Four patterns, Adapter is a structural pattern, much like Prox...
• 5 Free OCAJP 7 and OCPJP7 Mock Exams - Online Practice Test (1Z0-803 and 1Z0-804
  on Aug 27, 2016 in Java Certification OCPJP SCJP
  Hello guys, today I am going to share a list of free OCAJP7 and OCPJP7 mock exams and online practice tests. If you are preparing for Java SE 7 Programmer 1 or 2 certification or upgrading your existing OCJP 6 exam then this will help you to gauge yo...
• java.lang.numberformatexception for input string null - Cause and Solution
  on Aug 27, 2016 in error and exception
  The java.lang.NumberFormatException comes when you try to parse a non-numeric String to Number e.g. Short, Integer, Float, Double etc. For example, if you try to convert . "null" to an integer then you will get NumberFormatException. The er...
• 5 Essential difference between Callable and Runnable interface in Java?
  on Aug 20, 2016 in Java multithreading Tutorials thread interview questions
  The difference between Callable and Runnable is one of the most frequently asked multi-threading and concurrency interview question in Java world. I remember, it was 2007 when I first heard about Callable interface and that too on a telephonic interv...
• InOrder traversal of Binary tree in Java using Recursion and Iteration
  on Aug 17, 2016 in binary tree data structure and algorithm
  This is the second article about tree traversal algorithms using Java. In the first part, we have seen the pre-order algorithm for visiting all nodes of the binary tree and today we'll learn about the InOrder traversal. As I told you before, unli...
• Why Timestamp cannot be used in place of Date in Java?
  on Aug 15, 2016 in core java interview question date and time tutorial JDBC
  One of the tricky question from Java Interview is, "Can we pass a Timestamp instance to a method expecting java.util.Date?", it's a tricky question because the answer is both Yes and No. You can, of course, pass a Timestamp object to a...
• How to Iterate through ConcurrentHashMap and print all keys and values in Java
  on Aug 8, 2016 in collections interview questions java collection tutorial
  Suppose you have a ConcurrentHashMap of String and Integer and you want to print all keys and values, how do you that? This is a common, day to day programming task for Java programmer and there are many ways to do it. The Map interface provides seve...
• Top 10 Maven Plugins Every Java Developer Should Know
  on Aug 2, 2016 in Maven
  In the last couple of years, Maven has become the de-facto build tool for Java applications. Though there are challenges exists from tools like Gradle, but I think the dominance of Maven will help it to win the final battle. When I started with Maven...
• How to find the 3rd element from end in linked list in Java
  on Jul 31, 2016 in Coding Interview Question data structure and algorithm linked list
  The problem to find the 3rd element from the end in a singly linked list or nth node from the tail is one of the tricky but frequently asked linked list problems in programming job interviews. The challenge here is to solve the problem in just one pa...

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