Category: J2SE Category

difference between Abstract Class and Interface? 1. Main difference is methods of a Java interface are implicitly abstract and cannot have implementations. A Java abstract class can have instance methods that implements a default...

Transient variable can’t be serialize. For example if a variable is declared as transient in a Serializable class and the class is written to an ObjectStream, the value of the variable can’t be written...

Java SE 7 Download JDK 7 Java 7 (codename Dolphin) is a major update that was launched on July 7, 2011 and was made available for developers on July 28, 2011. The development period...

Java SE 6 Download JDK 6 Codename is Mustang. As of the version released on December 11, 2006, Sun replaced the name “J2SE” with Java SE and dropped the “.0” from the version number....

Java 5.0 New Features Autoboxing/Unboxing Enumerations Varargs Enhanced for loop Metadata-Annotations Java Generics Java 5.0 New Features Java 5.0 New features are listed in short here Autoboxing/Unboxing Enumerations – with ‘enum’ keyword Varargs –...

A class containing abstract method is called Abstract class. An Abstract class can’t be instantiated. Example of Abstract class: abstract class testAbstractClass { protected String myString; public String getMyString() { return myString; } public...

Java SE 10 Download JDK 10 Java 10 will use the new versioning convention set out by Oracle this will see the version numbers following a YY.M format. So far the versions announced using...

Java SE 9 Download JDK 9 The first stable release of Java 9 was on September 21, 2017 Java 9 include below features Better support for multi-gigabyte heaps better native code integration Different default...