This tutorial will be very interesting. Last week I was working on a Java Project which requires me to have list of Classes from .jar file. With the help of JarEntry and JarInputStream utility I was …
Java and J2EE Tutorials Archives...
One of my favorite language Java is a programming language and computing platform developed by Sun which is acquired by Oracle now. J2EE is Java Enterprise Edition, which consists of core Java with a powerful set of libraries.
On Crunchify, we do have more than 600+ Java and J2EE tips with additional production ready utilities. Explore all tutorials below.
In Java how to join Arrays? 3 ways: Apache Commons ArrayUtils, Java 8 Streams and Simple APIs
In this tutorial we will go over different ways we can join Java Arrays. If you have any of below questions then you are at right place: How can I concatenate two arrays in Java?How to Merge Two …
In Java How to Check if Number/String is Palindrome or not?
What is Palindrome number? A palindromic number is a number (such as 24842) that remains the same when its digits are reversed. Here are few other names: numeral palindromenumeric …
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In Java How to convert Negative number to Positive with Simple Math operation?
In this tutorial we will go over how do you turn a negative value into a positive value? Simple method is to multiply negative number with Minus One to Convert a Positive Number. In this tutorial …
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Best way to Compare String Arrays, Integer Arrays and Strings in Java – “CrunchifyCompare” Overloaded Utility for your Project
java.util.* package contains so many utilities like collection framework, event model, date facility, time facility and so on. Java doesn't provide simple compare utility for primitive types …
In Java how to convert .PNG image to .JPG using ImageIO and BufferedImage?
In this tutorial we will go over steps on how to convert PNG image to JPG image? The BufferedImage subclass describes an Image with an accessible buffer of image data. A BufferedImage is comprised …
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Simple way to check if URL is valid or invalid? How to Validate URLs in Java
In Java how to simple way to check if URL is valid or invalid? Well there are multiple ways you could do that. In our tutorial, we will use org.apache.commons.validator.routines.UrlValidator to …
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Log File Tailer (tail -f) implementation in Java – Best way to tail any file programmatically
File operations using Java are my favorite part. There are number of tutorials you may have seen on Crunchify like append data to file, read data from file, read and parse JSON file, read …
Java Timer, TimerTask, Reminder Class Tutorial with Example
java.util.Timer is a utility class that can be used to schedule a thread to be executed at certain time in future. Java Timer class can be used to schedule a task to be run one-time or to be run at …
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