Page 139 - Computer science 868 Class 12
P. 139

public static void main(String[] args)
                      {
                             // Output
                             System.out.println(“Hello, World! This is a basic output example.”);
                         }
                     }
                 //OUTPUT
                 Hello, World! This is a basic output example.

                 You can use various other classes for more sophisticated output, such as PrintWriter for writing formatted text to an
                 output stream.
                 Here’s an example using PrintWriter:
                     import java.io.PrintWriter;
                     public class PrintWriterExample {
                         public static void main(String[] args) {
                         // Output

                             try {
                                 PrintWriter writer = new PrintWriter(System.out);
                                 writer.println(“Hello, World! This is a PrintWriter example.”);
                                 writer.close();
                             } catch (Exception e) {
                                 e.printStackTrace();
                             }
                         }
                     }
                 //OUTPUT
                 Hello, World! This is a PrintWriter example.


                         Note: Make sure to handle any exceptions that might be thrown while working with I/O operations.



                               Let’s Revisit


                       ♦ Procedural Programming follows the top-down approach.
                       ♦ Object-Oriented Programming follows the bottom-up approach.
                       ♦ An object is a unique entity that contains properties, methods and events together in an Object-Oriented Programming
                      Language.
                       ♦ The classes in Java are non-primitive/user-defined data types that act as a blueprint for creating objects of the same type.
                       ♦ Class is a factory of objects.
                       ♦ Object is an instance of a class.
                       ♦ Class is a user–defined data type.
                       ♦ A superclass is a class from where features are inherited to another class. It is also known as the base class or the parent class.
                       ♦ A subclass is a class that inherits the features of another class. It is also called the derived class or the extended class or the
                      child class.
                       ♦ Java uses the principle of WORA , i.e., Write Once, Run Anywhere.
                       ♦ Java is a platform-independent programming language.
                       ♦ Libraries in Java consist of different built-in methods which help the programmer to write the code.
                       ♦ Reserved words of Java are known as keywords.
                       ♦ Comments are the statements in the program code which are non-executable.



                                                                                                                       137
                                                                                                   Programming in Java  137
   134   135   136   137   138   139   140   141   142   143   144