Java Programming Fundamentals
Short summary:
Java Program The next line which contains a curly brace indicates the start of a block. In this code, we placed the curly brace at the next line after the class declaration ...
Long summary:
Programming Fundamentals Introduction to Programming 1 1 4 Programming Fundamentals Introduction to Programming 1 2 Objectives At the end of the lesson, the student should be able to: Identify the basic parts of a Java program Differentiate among Java literals, primitive data types, variable types ,identifiers and operators Develop a simple valid Java program using the concepts learned in this chapter Introduction to Programming 1 3 Dissecting my First Java Program 1 public class Hello 2 3 /** 4 * My first Java program 5 */ 6 public static void main( String args ) 7 8 //prints the string Hello world on screen 9 System.out.println(Hello world); 10 11 12 Introduction to Programming 1 4 indicates the name of the class which is Hello In Java, all code should be placed inside a class declaration The class uses an access specifier public , which indicates that our class in accessible to other classes from other packages (packages are a collection of classes). We will be covering packages and access specifiers later. 1 public class Hello 2 3 /** 4 * My first Java program 5 */ Dissecting my First Java Program Introduction to Programming 1 5 1 public class Hello 2 3 /** 4 * My first Java program 5 */ Dissecting my First Java Program The next line which contains a curly brace indicates the start of a block. In this code, we placed the curly brace at the next line after the class declaration, however, we can also place this next to the first line of our code. So, we could actually write our code as: public class Hello Introduction to Programming 1 6 The next three lines indicates a Java comment. A comment something used to document a part of a code. It is not part of the program itself, but used for documentation purposes. It is good programming practice to add comments to your code. 1 public class Hello 2 3 /** 4 * My first Java program 5 */ Dissecting my First Java Program Introduction to Programming 1 7 indicates the name of one method in Hello which is the main method. The main method is the starting point of a Java program. All programs except Applets written in Java start with the main method. Make sure to follow the exact signature. 1 public class Hello 2 3 /** 4 * My first Java program 5 */ 6 public static void main( String args ) Dissecting my First Java Program Introduction to Programming 1 8 The next line is also a Java comment 1 public class Hello 2 3 /** 4 * My first Java program 5 */ 6 public static void main( String args ) 7 8 //prints the string Hello world on screen Dissecting my First Java Program Introduction to Programming 1 9 The command System.out.println() , prints the text enclosed by quotation on the screen. 1 public class Hello 2 3 /** 4 * My first Java program 5 */ 6 public static void main( String args ) 7 8 //prints the string Hello world on screen 9 System.out.println(Hello world); Dissecting my First Java Program Introduction to Programming 1 10 The last two lines which contains the two ...
Source: www.javapassion.com
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