Java Data | Yazilim Ders

What is the Difference Between a Class and an Object in Java ?

A Class is a template or a blue print of an Object to be created. An Object is an instance of a Class. A Class...

192 Java

What are the Rules of Method Overloading and Method Overriding in Java ?

When we want to overload a method, we need to make sure that the method name remains same. But method...

204 Java

What is the Use of Run Time Polymorphism in Java ?

During the run time the behavior of an Object can change based on its run time state. Due to this run time...

213 Java

Why String Class is Immutable or Final in Java ?

Since String objects are cached in a String pool, it makes sense to make the String immutable. The cached String...

200 Java

Why Java Does Not Support Operator Overloading ?

Java supports Method overloading but does not support operator overloading. It would make the design more...

222 Java

Why Do We Use JSP Instead of Servlet in Java ?

Since JSP pages are dynamically compiled into servlets, the programmers can easily make updates to the presentation layer code...

211 Java

What is the Difference Between a Cookie and a Session Object in Java ?

Both Cookie and Session are used during communication between Client and Server. The Client can disable...

199 Java

When Do You Use Exception or Error in Java ?

Throwable class is the superclass of Exception and Error classes in Java...

191 Java

How Can You Make an Object Eligible for Garbage Collection in Java ?

To make an Object eligible for Garbage collection, just make sure that it is unreachable to the program in which...

187 Java

Why Collection Interface Doesn’t Extend Cloneable and Serializable Interfaces in Java ?

Collection interface just specifies groups of objects known as elements. Each concrete implementation of a Collection...

220 Java

What is the Difference Between pass by reference and pass by value in Java ?

Whenever an object is passed by value, it means that a copy of the object is passed. Even if changes are...

220 Java

Enumeration and Iterator, Which One Has Better Performance in Java ?

Enumeration interface is a read-only interface. It has better performance than Iterator. It is almost twice as fast...

190 Java

What is the Difference Between DOM and SAX Parser in Java ?

In Java, Document Object Model (DOM) parser loads the whole XML into memory and creates a tree based...

219 Java

How Can We Print an Array in Java ?

We can print an array by using methods of Arrays class. We can either use Arrays.toString() method or we can...

194 Java

What is Volatile Keyword in Java ?

The volatile keyword guarantees global ordering on reads and writes to a variable. This implies that every thread...

210 Java

What is a Compile Time Constant in Java ?

A compile time constant is public static final variable. The public modifier is optional here. At compile time, they...

198 Java

How Can We Find the Memory Usage of JVM From Java Code ?

We can use memory management related methods provided in java.lang.Runtime class to get the free memory...

236 Java

How Stack and Heap Work in Java Multi-threading Environment ?

In Java, Stack and heap are memory areas available to an application. Every thread has its own stack. It is used...

228 Java

What are the Different States of a Thread in Java ?

Following are the different states of a Thread in Java..

186 Java

What are the Disadvantages of Multithreading in Java ?

There are certain downsides to Multithreading...

195 Java

Total Result : 150