String A string is a set of one or more characters enclosed in double quotes or simply a string is an array of characters. Strings, which are widely used in Java programming, are a sequence of characters. In the Java programming language, strings are objects. The Java platform provides the String class to create […]
Continue ReadingA multithreaded program contains two or more parts that can run concurrently. Each part of such a program is called a thread, and each thread defines a separate path of execution. Thus, multithreading is a specialized form of multitasking. There are two distinct types of multitasking: process-based and thread-based. A process-based multitasking is the feature […]
Continue ReadingException Handling Error occurred in a program can be of two types: syntax error or logical error. An exception is an abnormal condition that arises in a code sequence at run time. In other words, an exception is a run-time error. A Java exception is an object that describes an exceptional (that is, […]
Continue ReadingInheritance It is the process by which object of one class can acquire the properties of object of another class. The class, from which properties are inherited, is known as super class. The class, to which properties are inherited, is known as sub class. A sub class inherits all of the variables and methods defined by the […]
Continue ReadingClass and object A class is a user defined data type which binds data and function into a single unit and objects are the instance of a class. A class is declared by use of the class keyword. The general form of a class definition is shown here:
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class classname { type instance-variable1; type instance-variable2; type instance-variablen; type methodname1(parameter-list) { // body of method } type methodname2(parameter-list) { // body of methodTHE JAVA LANGUAGE } type methodnamen(parameter-list) { // body of method } } |
The data, or variables, defined within a […]
Continue ReadingJava’s Control Statements A programming language uses control statements to cause the flow of execution to advance and branch based on changes to the state of a program. Java’s program control statements can be put into the following categories: selection, iteration, and jump. Selection statements allows program to choose different paths of execution based upon the outcome of […]
Continue ReadingData Types Array
Continue ReadingExample;-WAP to print a message “Welcome to Java World”.
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class Example { public static void main (String args[]) { System.out.println ("Welcome to Java World"); } } |
Output: Welcome to Java World Explanation of above program public static void main(String args[]) All Java applications begin execution from main ( ) function. (This is just like C/C++.) The public keyword is an access specifier, which allows the programmer to control the visibility of […]
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