We can edit, compile, run and debug Java programs using Eclipse and NetBeans.
Eclipse and NetBeans are two free integrated development environments for writing Java programs. Both are easy to learn if you follow simple instructions.
We recommend that you use one of them to write programs in Java. In the first section, we will use Eclipse to develop a simple Java program.
We will walk you step by step through the basic instructions for new users to create a project, create a class, compile and execute a class in Eclipse.
The use of NetBeans is presented in the next section.
Requirements for developing a simple Java program in Eclipse
Below are some useful instructions for developing and running a program in Java :
a) Install the Eclipse IDE. If you do not have this installed, download and install the Eclipse IDE. Go to this course to do that: Download and install Eclipse IDE for Java
(b) Write a Java program.
c) Compile a Java program.
d) Start the Java program.
We hope you have successfully installed the Eclipse IDE by following all the instructions. We will now understand how to create a Java project in Eclipse.
How to create a Java project in Eclipse
Before you create Java programs in the Eclipse IDE, you must first create a project. The project can be compared to a folder structure containing Java programs and all associated files. We only have to make a project once.
Follow these steps to create a Java project in Eclipse :
1. First, open the Eclipse IDE and select File > New > Java Project to display the New Project Wizard, as shown in the figure.
2. A new project record is displayed. Select the Java project and click the Next button as shown in the figure below.
3. In the Project Name field, enter the Java project. As you type, the location field automatically defaults. You can also customize the location of your project. Take a look at the following figure to understand it better.
4. Make sure you select the option Use project folder as root for source and class files, so that the .java and .class files are in the same folder for easy access.
4. Click Finish to create the project as shown in the figure above.
Now the Java project is created with the src folder as shown in the figure below. The next step is to create a package folder.
How to create a Java package in Eclipse
To create a Java package in the Eclipse IDE, follow these steps:
1. Right-click on the newly created Java project > New > Package. The New Java Package Wizard opens, as shown in the following figure.
2. Enter the name of the javaProgram package and click Finish. On the left side, a folder is created with the name javaProgram.
We will learn how to systematically create a package in Java in the next tutorial.
How to create a Java class in Eclipse
After creating a package in the Java project, we can use the following steps to create a program in the Java project:
1. Right-click on the name of the javaProgram package and select File > New > Class to call up the New Java Class Wizard.
2. In the Name > field, activate the public static void main(String[] args) option, as shown in the following figure.
3. Click Finish to create a template for the program source code named Hello.java.
A class called Hello.java is created under the package name on the left.
Now we will write the first simple Java program in the template as written in the following source code.
Program source code :
javaProgram package; public class
hi {
public static void main(String[] args) {
System.out.println(Hello World);
}
}
We developed a simple Java program in the Eclipse IDE. The next step is to compile and run the Java program.
How to compile and run a Java program in Eclipse?
To run a Java program, right-click the class in the project to display the context menu. Select Run as > Java application from the context menu to run the Java program.
The output signal is displayed on the console as shown in the figure below.
How do I create a Java project in NetBeans?
First, download and install the latest version of Apache NetBeans on your computer system according to your computer’s configuration. Go to this course to do that: Download NetBeans
Before you develop a Java program, you must first create a project. Here are the steps to follow to create a Java project in NetBeans:
1. Choose File > New Project to open the New Project dialog box.
2. Select Java under Categories and Java Application under Projects. Click Next to open the New Java Application dialog box.
3. In the Project Name field, type Java Project and navigate to the desired project location. Uncheck the option Use selected folder to store libraries and the option Create master class.
4. Click Finish to create the project in NetBeans.
Creating a Java class in NetBeans
Once the project is developed, we can create a Java program in the project by following the steps below:
1. Right-click the Java Project node in the Project window to display the context menu. Choose New > Java Class to open the New Java Class dialog box.
2. In the Class name box, type the name Welcome, and in the Location box, choose Source packages. Leave the Package field empty. A class is created in the default package.
3. Click the Done button to create the Hello class. The source code file Hello.java is located below the node.
4. Modify the Hello class code according to the source code of the above program.
Compile and run a Java program in NetBeans
To run Hello.java, right-click on Hello.java to display the context menu and select Run File, or just press Shift + F6. The output is displayed in the Output field.
The Run File command automatically compiles the program if it has been modified.
I hope this tutorial has covered almost all the important points of developing a simple Java program in the Eclipse IDE and NetBeans. I hope you understood how to create, modify, compile and run Java programs in Eclipse and NetBeans.
Thanks for reading!!!
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