How can I execute a Java program?

Asked by Last Modified  

5 Answers

Learn Java

Follow 5
Answer

Please enter your answer

Amit Raj

TECHNICAL ARCHIECT & LEAD ENGINEER – GEN AI & DATABRICKS, CLOUD (AZURE, AWS), DEVOPS, DBT

Through command-line 1.compile the code using javac filename.java 2. Finally run the code using java filename here filename is classname. If u use eclipse then right click the java code n select run as java application .
Comments
Dislike Bookmark

Java source code is compiled into bytecode when we use the javac compiler. The bytecode gets saved on the disk with the file extension .class . When the program is to be run, the bytecode is converted, using the just-in-time (JIT) compiler. The result is machine code which is then fed to the memory and...
read more
Java source code is compiled into bytecode when we use the javac compiler. The bytecode gets saved on the disk with the file extension .class . When the program is to be run, the bytecode is converted, using the just-in-time (JIT) compiler. The result is machine code which is then fed to the memory and is executed. read less
Comments
Dislike Bookmark

Running a Java Program from Command Prompt ------------------------------ Create a temporary folder C:\mywork. Using Notepad or another text editor, create a small Java file HelloWorld.java with the following text: public class HelloWorld { public static void main(String args) { System.out.println("Hello,...
read more
Running a Java Program from Command Prompt ------------------------------ Create a temporary folder C:\mywork. Using Notepad or another text editor, create a small Java file HelloWorld.java with the following text: public class HelloWorld { public static void main(String[] args) { System.out.println("Hello, World!"); } } Save your file as HelloWorld.java in C:\mywork. To make sure your file name is HeloWorld.java, (not HelloWorld.java.txt), first choose "Save as file type:" All files, then type in the file name HelloWorld.java. Run Command Prompt (found under All Programs/Accessories in the Start menu). Type C:\> cd \mywork This makes C:\mywork the current directory. C:\mywork> dir This displays the directory contents. You should see HelloWorld.java among the files. C:\mywork> set path=%path%;C:\Program Files\Java\jdk1.8.0_51\bin (use the JDK folder for the version installed on your system). This tells the system where to find JDK programs. C:\mywork> javac HelloWorld.java This runs javac.exe, the compiler. You should see nothing but the next system prompt... C:\mywork> dir javac has created the HelloWorld.class file. You should see HelloWorld.java and HelloWorld.class among the files. C:\mywork> java HelloWorld This runs the Java interpreter. You should see the program output: Hello, World! If the system cannot find javac, check the set path command. read less
Comments
Dislike Bookmark

Tutor

At Dos prompt , write following commands Javac filename E.g. Javac x.java To run program after compilation Write following code Java filename E.g. Java x
Comments
Dislike Bookmark

Download and install the latest version of the Java Platform, Standard Edition Development Kit (Java SE 6 Update 27). Note the installation directory for later—probably something like C:\Program Files\Java\jdk1.6.0_27\bin. To make sure that Windows can find the Java compiler and interpreter: Select Start...
read more
Download and install the latest version of the Java Platform, Standard Edition Development Kit (Java SE 6 Update 27). Note the installation directory for later—probably something like C:\Program Files\Java\jdk1.6.0_27\bin. To make sure that Windows can find the Java compiler and interpreter: Select Start -> Computer -> System Properties -> Advanced system settings -> Environment Variables -> System variables -> PATH. [ In Vista, select Start -> My Computer -> Properties -> Advanced -> Environment Variables -> System variables -> PATH. ] [ In Windows XP, Select Start -> Control Panel -> System -> Advanced -> Environment Variables -> System variables -> PATH. ] Prepend C:\Program Files\Java\jdk1.6.0_27\bin; to the beginning of the PATH variable. Click OK three times. Then Compile the Program From the Command Prompt, navigate to the directory containing your .java files, say C:\introcs\hello, by typing the cd command below. C:\Users\username>cd c:\introcs\hello C:\introcs\hello\> Assuming the file, say HelloWorld.java, is in the current working directory, type the javac command in boldface below to compile it. C:\introcs\hello\>javac HelloWorld.java C:\introcs\hello\> Execute the Program From the Command Prompt, type the java command below. C:\introcs\hello\>java HelloWorld Hello, World If all goes well, you should see the output of the program - Hello, World. read less
Comments
Dislike Bookmark

View 3 more Answers

Related Questions

What is a complete list of topics of Core Java and topics of Advanced Java?
Certainly! Here's a brief list of topics for both Core Java and Advanced Java: Core Java: Basics of Java Data Types and Variables Control Flow (if, else, switch) Loops (for, while, do-while) Arrays Methods Object-Oriented...
Archit
0 0
View Comments5
Which institute is best for java core learning?
For core java RPISE(rajesh patkar classe) is very good . he thought you from the sacratch . i was did there one course, There are lots od students apart from IT backgrounf was came there and they understood...
Hrhrh
Is it possible to learn java at home without coaching in one month?
It all depends on you. If you are already aware of programming then it is definetly possible to learn java at home. But if learn through a tutor then you can learn easily.
Pritom
0 0
View Comments5
Why is finally introduced in Java?
finally is block which executes every time regardless exception has occurred or not. Finally is important in case you want to do some task which must be done like clean-up, db connection closure, memory de-allocation etc.
Agastya
What equipment do you need to teach online Java classes?
Team Viewer is the best tool for the same.
Imran
0 0
View Comments5

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Difference Between Checked And Un-Checked Exception
1. Exception is an abnormal condition in the program, if raises program terminates abnormally. 2. Exception always occurs at runtime only, there is no chance of exception at compile time. 3. Syntactical...

Md Ajmat

0 0
View Comments0
Observer Pattern in Java.
As I was going through the different source code files of the Java Util package, I found the implementation of the Observer Pattern ( see the Gang of Four books for more information on this pattern) in...

Somenath Mukhopadhyay

0 0
View Comments0
How can everyone prepare to clear any Java interview?
Java interview your java should be much strong then J2EE. core java and Advance java is the basic foundation for Interview. Some of the topic about which you should know before going for a java interview...

Bright Computer Education

1 0
View Comments0
Learn to code from an Engineer || Linear search || Python

Syed Chintu

0 0
View Comments0
2.1. Reverse a singly linked list.
class Node { int data; Node next; Node(int data) { this.data = data; this.next = null; }} public class LinkedList { Node head; public void reverse() { Node prev = null; Node curr = head; Node next =...

Vivek J.

0 0
View Comments0

Recommended Articles

Why Should You Learn Java !

Java is the most famous programming language till date. 20 years is a big time for any programming language to survive and gain strength. Java has been proved to be one of the most reliable programming languages for networked computers. source:techcentral.com Java was developed to pertain over the Internet. Over...

Read full article >

Some Popular IT Courses in Current Market

In the domain of Information Technology, there is always a lot to learn and implement. However, some technologies have a relatively higher demand than the rest of the others. So here are some popular IT courses for the present and upcoming future: Cloud Computing Cloud Computing is a computing technique which is used...

Read full article >

Top 5 Reasons to Learn JavaScript

Before we start on the importance of learning JavaScript, let’s start with a short introduction on the topic. JavaScript is the most popular programming language in the world, precisely it is the language - for Computers, the Web, Servers, Smart Phone, Laptops, Mobiles, Tablets and more. And if you are a beginner or planning...

Read full article >

Java: An Object-Oriented Language

Java is the most commonly used popular programming language for the creation of web applications and platform today. Integrated Cloud Applications and Platform Services Oracle says, “Java developers worldwide has over 9 million and runs approximately 3 billion mobile phones”.  Right from its first implication as java 1.0...

Read full article >

Find Java Training Classes near you
Java Training Classes in Bangalore
Java Training Classes in Hyderabad
Java Training Classes in Pune
Java Training Classes in Chennai
Java Training Classes in Delhi
Java Training Classes in Mumbai
Java Training Classes in Kolkata
Java Training Classes in Noida
Java Training Classes in Gurgaon
Java Training Classes in Ghaziabad
Online Java Training

Looking for Java Training Classes?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you