String class plays an important role in Java coding. There are lot of string operations, a Programmer should be acquainted of. This Web site gives you all under the caption String and StringBuffer. One important manipulation on strings is Parsing Java where a string is parsed to data type. Parsing operation converts string to primitive …
Converting string to data type is known as parsing and for we know for parsing operations, we use wrapper classes. The other way of parsing is converting data types to string. Following table gives you all conversions at a single point. Following links give the conversions 1. byte to stirng 2. short to stirng 3. …
Converting int to sting and also string to int required very often in coding. To do the job, Java comes with valueOf() method. valueOf() is overloaded that can take any data type or object as parameter and converts. The other way is converting primitive data types like int, double, boolean etc. into string form. Sometimes, …
We know Java supports three types of classes – Concrete, abstract and interfaces. After summarizing the difference between abstract classes and interfaces, let us tabulate the difference between classes and interfaces. Class Interface Supports only multilevel and hierarchical inheritances but not multiple inheritance Supports all types of inheritance – multilevel, hierarchical and multiple "extends" keyword …
After knowing what is an abstract class and interface in Java, let us summarize their differences. The differences Abstract class vs Interface given in a table format, at a single place, gives more clarity for a novice, attempting to learn Java. Table on Abstract class vs Interface Abstract class Interface Supports multilevel and hierarchical inheritance …
After learning "what is class in Java", let us go to see how many Java Types of Classes exist. Java supports three types of classes. 1. Concrete classes 2. Abstract classes 3. Interfaces 1. Concrete Classes Java comes with two types of classes – Concrete classes and Abstract classes. What we call, generally a class …
The basic construct of programming is Class Java like the basic constructs for a building is sand, cement and steel. Inside the class, exists other constructs like main, methods, variables and constructors etc. Java demands to write any code of any thousands of lines, within the class declaration only – between the open brace, {, …
For Java Beginners, it is simple language to learn and practice. C/C++ students and programmers accept this without any discussion. First reason why simple is "Java does not support pointers" and infact we write Data structures without pointers – Unbelievable for C/C++ people. But Java is vast like a ocean. It requires good practice for …
After learning "What is a class in Java?" and "What is Java Application?", let us know the types of classes Java supports. Java supports basically three types of classes. These types are discussed in this tutorial Java Classes and Interfaces. 1. General classes (known as concrete classes) 2. Abstract classes 3. Interfaces The basic difference …
What is a class in Java? A simple question to answer. Class is a basic unit of Java programming. A class in Java is a structure which contains programming constructs. Programming constructs are small pieces of code with which a program is built; like bricks, cement and sand are constructs to construct a building. The …
In computer terminology, an interface is a meeting point or a connecting point or a communication point between two. If the two are systems in LAN, the interface is a socket and in RMI (Remote Method Invocation, a Java technology), the meeting point is RMI Registry and in Web communication, the interface is Internet. Now …
When you start learning a new language, you fear a lot thinking how much trouble to face and concentration is required, as this is the impression left by C/C++ while you learnt. Remember one thing, Java Designers always aim only two things while developing the language – how to make language simple to learn and …
All the Java programs can be divided into two groups – Applications and Applets. The basic difference is that Application can be executed at command (DOS) prompt and Applet executes in a Browser. Here, we are concerned with Java Application. There are three steps to write Java Application – Writing source code, Compilation and Execution. …
Application, may be of Java or other language, comes with a clear task to do. To achieve the task, an application comprises of a number of individual programs. All these programs are weaved carefully by the Developer to achieve the task. Read further into "What is Java Application?" For example, I would like to transfer …
Java comes with many Data Structures of which very often used is ArrayList. The advantage of ArrayList is it accepts duplicates and the methods are not synchronized. For this reason, the execution of Java array list is faster. The elements can be added or retrieved very fast. ArrayList is derived from List interface and again …
After knowing how to convert list to array, let us do the other way array to list java. To convert list to array we used to toArray() method. Now the method to convert array to list Java is asList() method of class Arrays (do not confuse, there is class called Arrays in Java from java.util …
Java is an easy language to learn and practice, everyone accepts. Especially, C/C++ Students feel Java is very easy as Java does not support pointers. We write Linked List program in Java without pointers. Something strange, you feel. It is true. All discussed briefly in this tutorial Basic Java and later links are given to …
Java static is a keyword used with instance variables and methods. Generally to call instance variables (the global variables of C-lang are known as instance variables in Java) and methods, we require an object. But to call static variables and methods we do not require an object. Infact, Java static keyword is known as access …
One of the features of Java is platform independent. It achieves platform Independence through bytecode generation. Let us compile a simple Java program to see how bytecode looks. Following is the example code to see the bytecode that prints "Hello World". public class Demo { public static void main(String args[]) { System.out.println(“Hello World”); } } …
Learning Java is simple. It is preferred to know C-lang earlier. Knowledge of C++ is not essential as same OOPS concepts we learn with Java syntax. This Simple Java Application gives you step-wise writing source code, compilation and execution. Note: Before coming to know this tutorial, you are expected to know Java features, Java keywords …
