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Quick guide to solve OutOfMemoryError in Tomcat with possible causes like JDBC drivers, Threads and ClassLoaders.
Difference between Wait Sleep and Yield Java
Good explanation of this popular interview question. I have also shared my view as Differences between sleep and wait in Java.
java.lang.UnsupportedClassVersionError: Bad version number in .class file cause and solution
Quick guide on how to solve Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file with real cause and troubleshooting tips.
Difference between SAX and DOM Parser in Java
SAX(Simple API for XML) and DOM(Document Object Model) are two very popular XML Parse used to read XML files in Java but there is difference how they parse xml file and without knowling there limitati...
How to read Images in Java using ImageIO
Reading Images in Java ( PNG, JPG, GIF and other formats) is very easy when you use ImageIO classes. they provide convenient utility method to read images from either file system or from URL. Similar...
How to Convert key and value of Map into List in Java
In order to convert Map into List you can convert either keys of Map into List or values of Map into List. This article is quick tip to convert either keys or values into List in Java.
How to loop Map in Java - Code Example
looping Map is very easy in Java by using foreach loop and iterator in Java. you can iterate on keySet or EntrySet and get all keys and values from Map in java. This article contains 4 ways to iterate...
Learn how to use Regular Expressions in Java
Learn how to use Regular Expressions in Java. Regular Expressions help in finding the pattern in a text (String, in Java).
What is final keyword in Java with Example
Detailed explanation of what is final keyword in Java, final variables, final fields, final method and final class in Java. Should you make static variable final or not, can you override final method ...
Diference between JVM and JRE in Java
Java uses JRE, JDK, JVM and JIT which looks quite similar but they are entirely different to each other. JRE is java runtime, JDK is java development kit, JVM is java virtul machine and JIT statnds fo...