Abstract keyword declares either a method or a class. If a method has a abstract keyword in front of it,it is called abstract method.Abstract method hs no body. It has only arguments and return...
Java is compiled to be a byte code which is the intermediate language between source code and machine code. This byte code is not platform specific and hence can be fed to any platform....
What does the keyword “synchronize” mean in java. When do you use it? What are the disadvantages of synchronization? Synchronize is used when you want to make your methods thread safe. The disadvantage of...
Native methods are methods written in other languages like C, C++, or even assembly language. You can call native methods from Java using JNI. Native methods are used when the implementation of a particular...
JavaBeans is a portable, platform-independent component model written in the Java programming language, developed in collaboration with industry leaders. It enables developers to write reusable components once and run them anywhere — benefiting from...
What is the difference between a Vector and an Array. Discuss the advantages and disadvantages of both? Vector can contain objects of different types whereas array can contain objects only of a single type....
A Java application is made up of a main() method declared as public static void that accepts a string array argument, along with any other classes that main() calls. It lives in the environment...
As long as all implementaions of java are certified by sun as 100% pure java this promise of “Write once, Run everywhere” will hold true. But as soon as various java core implemenations start...
The Java runtime environment deletes objects when it determines that they are no longer being used. This process is known as garbage collection. The Java runtime environment supports a garbage collector that periodically frees...
A StringBuffer implements a mutable sequence of characters. A StringBuffer is like a String, but can be modified. At any point in time it contains some particular sequence of characters, but the length and...
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