![The Process of Entering and Executing a Java
Contd..
Program
class Example
{
public static void main(String args[])
{
system.out.println(“Hello World”);
}
}
9CM604.5 4](https://image.slidesharecdn.com/processprogram9cm604-5-130217014900-phpapp01/85/Process-program9-cm604-5-4-320.jpg)
Process program9 cm604.5
- 1. Objectives On completion of this period, you would be able to know • The process of entering and execution of a Java program • White spaces, separators, literals and keywords • Comments in Java 9CM604.5 1
- 2. Recap • What is a Byte Code • What are the OOP Concepts • Define Encapsulation • Define Inheritance • Define Polymorphism 9CM604.5 2
- 3. The Process of Entering and Executing a Java Program Entering a Java Program • We can create a program using any text editor • Let us assume we have entered the following program 9CM604.5 3
- 4. The Process of Entering and Executing a Java Contd.. Program class Example { public static void main(String args[]) { system.out.println(“Hello World”); } } 9CM604.5 4
- 5. The Process of Entering and Executing a Java Contd.. Program • We must save this program in a file called Example.java • Ensure that the file name contains the class name • This file is called the source file 9CM604.5 5
- 6. The Process of Entering and Executing a Java Contd.. Program • All Java source files will have the extension .java • If a program contains multiple classes, the file name must be the class name of the class containing the main method 9CM604.5 6
- 7. Executing a Java Program Executing a Java Program involves two steps 1) Compiling a Java program 2) Running a Java program 9CM604.5 7
- 8. Compiling a Java Program • To compile the program we must run with the Java compiler ‘javac’ with the name of the source file on the command line shown below C: javac Example.java 9CM604.5 8
- 9. Executing a Java Program • We need to use the Java interpreter to run a stand alone program • At the command prompt type C: java Example 9CM604.5 9
- 10. Summary • The process of entering and execution of a Java program • White spaces, separators, literals and keywords • Comment statements in Java 9CM604.5 10
- 11. Quiz 1. Period . is a _________ a) Key Words b) White Space c) Separator d) Comment 9CM604.5 11
- 12. Frequently Asked Questions • Explain the process of entering and executing a Java program • Explain the separators in Java • Write about white spaces in Java • List any eight keywords in Java • How can you write comments in Java 9CM604.5 12