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static keyword in java

static keyword in Java is used a lot in java programming. Java static keyword is used to create a Class level variable in java. static variables and methods are part of the class, not the….

Java Decimal Rounding to round double, float to “n” decimal points and different rounding mode

Sometimes while working with double and floats, we need to round them to specific decimal points for calculation. For example, stores round final price to 2 decimal places with half-up rounding mode. Prior to Java….

Java JMX Client Example – JMX Authentication

In last tutorial we learned about JMX Basics and how can we use JConsole to manage MBeans. Today we will look into java jmx client example and role based authentication through config files. Java JMX….

What is JMX? 10 mins Quick Start JMX Tutorial (MBean, JConsole)

Java Management Extensions (JMX) was introduced in J2SE 5.0 release. It provides an architecture to manage resources dynamically at runtime. JMX is used mostly in enterprise applications to make the system configurable or to get….

Java jar seal packages

Java JAR provides option to seal the package. Java jar seal package means that if any program is using that jar then all the classes should be loaded from that jar itself. Any attempt to….

How to run JAR File

Today we will learn how to run JAR File in java. In last tutorial we learned how to create jar file. Here we will learn how to run jar file from command line and some….

How to create JAR from Java Classes

Java Archive (JAR) files allows us to bundle multiple files in a single archive. Usually jar files contain class files and some other files like property files, images, applets etc. We all have used jar….

Java Collections Interview Questions

40 Java Collections Interview Questions and Answers

Java Collections Framework is one of the core APIs of java programming language. It’s one of the important topics for java interview questions. Here I am listing some important java collections interview questions and answers….

Composition in Java Example

Composition in java is the design technique to implement has-a relationship in classes. We can use java inheritance or Object composition in java for code reuse. Composition in Java Java composition is achieved by using….

Java String Interview Questions and Answers

String is one of the most widely used Java Class. Here I am listing some important Java String Interview Questions and Answers. This will be very helpful to get complete knowledge of String and tackle….

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