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Most of the activities we perform on day-to-day basis have lots of little steps. For e.g., an activity like send greeting card will contain small steps like go to the greeting card shop, choose it, pay for it, write the names and address, go to the post office, buy stamps, affix the stamps and drop the card in the post drop box. In this some steps like going to the post office, buying stamps and dropping the card in the post box are time-consuming and repetitive. Where as calculating the price of all the cards we bought, paying the money to the shop-keeper and counting the change returned is error prone. These kind of steps which does not need lot of human intervention and are not person dependent can be automated using Computer Programs. Please note that no matter how many steps we automate, there will be things like choosing the right card which needs the human intervention and the personal touch. The computer programs help in automating the tasks which are time consuming, error prone, repetitive, not person dependent etc., They also help in stream lining the processes, provide better experience to the end users, keeping track of historical data, analyze the data etc., Some programs are very expensive and could take 5 or more years with multiple teams working on it, while some might be relatively easy and can be built in matter of weeks by an individual developer.

Java Topic / Java tutorial As discussed in 118, an abstract classes do not map to real life objects and they can not exist on their own, with out taking the form any of its concrete sub-classes. _EG_ Shape can not exist on it own, it has to be either Rectangle or Square or Circle.

How HashMap works in Java or sometime how get method work in HashMap is common interview questions now days. Almost everybody who worked in Java knows what hashMap is, where to use hashMap or difference between hashtable and HashMap then why this interview question becomes so special? Because of the breadth and depth this question offers. It has become very popular java interview question in almost any senior or mid-senior level java interviews. Questions start with simple statement "Have you used HashMap before" or "What is HashMap? Why do we use it "

Java Topic / Java tutorial Java was conceived by James Gosling, Patrick Naughton, Chris Warth, Ed Frank and Mike Sheridan at Sun Microsystems, Inc in 1991. Initially it was called Oak, later it was changed to Java in 1995.

Java is not only a programming language but a platform also. Let's learn where it is used and what application we can create through java.

Java Topic / Java tutorial Classes are supported by every object oriented programming language and they can be used to group related data. For _EG_ if we take student details, although we can store the information about the student using primitive data types like int, double and char, it will be useful to have a separate type for student.

Collections classes are heart of java API though I feel using them judiuously is an art.its my personal experience where I have improved performance by using ArrayList where legacy codes are unnecesarily used Vector etc.JDK 1.5 introduce some good concurrent collections which is highly efficient for high volume , low latency system.

A good explanation of frequently asked java interview question Iterator vs Enumeration.Between two Enumeration is older and its there from jdk 1.0 while iterator was introduced later.The functionality of Enumeration interface is duplicated by the Iterator interface.

Learning a computer language is very easy compared to writing good programs and using the language effectively. For a beginner, it might take 4-5 months to learn a new language where as perfecting the programming skills including the design, debugging and maintenance might take more than 3 to 4 years. Listed below are few of skills which everyone needs for becoming a good programmer.

Java Topic / Java tutorial Java in order to support 73:security and 73:portability, does not compile the source code to executable code. It is translated into bytecode, which is highly optimized set of instructions designed to be executed by the Java run-time system, which is called Java Virtual Machine (JVM). JVM is an interpreter of bytecode.

Want to become a Web Developer but confused about which Programming Language to learn first? New-Age developers highly suggest Javascript because of its Versatility and Effectiveness to extend functionality and make websites extremely Rich and Scalable. If you are looking for a high growth Web Development Job Role, do checkout the MEAN Stack Developer Career Path by edWisor and get 4 Guaranteed interviews at top tech companies.