How to create XML programmatically in java / How to create XML using DOM parser in java / How to create XML file from java program

XML stands for eXtended Markup Language and is a widely used standard for transmitting information across systems mainly due to the flexibility it provides in creating the structure and data it can contain. That is, application developers can create their own structure which suits their application as there are no pre-defined tags in XML.

Scenario

Since it is a widely used standard, there arises a vital requirement to create an XML document either in the form of a String or a physical file from java application. Practical scenario is (more…)

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JDBC in java with example

JDBC stands for Java DataBase Connectivity and is a technology for database connectivity from java program. JDBC is a collection of multiple interfaces and classes which provides methods for database connection and operations.
Operations include executing SQL queries for fetching records, inserting and updating or deleting data from a database table directly from a java program.
For performing any operation on a database using JDBC, requires some steps. They are : (more…)

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How to load property file in java / How to load property file inside a package in java / Various methods to load a property file in java

A typical java application uses some values which are not suitable to be given in code such as log generation path, output location, configuration file path, timeout values etc. Since these values vary from system to system and user to user, their values can not be pre-fixed. One user may want his logs to be generated in “myLogs” folder, another user may want the logs to be generated in “appLogs” folder. If given in code, they cannot be changed without developer intervention. Further, this change would require a re-build of code. (more…)

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How to calculate next working day in java / How to increment date excluding weekend in java

It may happen that you need to add some days to a particular date and the resultant date is falling on either Saturday or Sunday. So you have to calculate the next working date.

Practical Application : This is usually required in payments industry where the dates are written to files and these files are then uploaded to server but the server rejects the file if the date is a holiday. In such cases the date should be checked to be a holiday before writing it to file and incremented to a working day and then written to the file so that it is not rejected. (more…)

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Various ways to determine if an entire string is a number in java / How to check if String does not contain number in java

There may be a scenario, if we want to determine whether a string is completely numeric or not, such as we want a user to input a number and our program should multiply it by 5 and return the result. User is a human. He may mistakenly input an alphanumeric string by mistake or to check the correctness of our program.
Off course, we would not like to show an exception trace to the user instead of the result. Better we check the input for its validity before processing. Below are various ways using which we may check that an input String is completely a number or not.
Check out: (more…)

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