Download Java Program Command Line Parameters Free



Download Java Program Command Line Parameters Free

In this page, we will learn how to write the simple program of java. We can write a simple hello java program easily after installing the JDK.

To create a simple java program, you need to create a class that contains the main method. Let's understand the requirement first.

The requirement for Java Hello World Example

Download Java Command Prompt for free. Server and Application Monitor helps you discover application dependencies to help identify relationships between application servers. Type path at the command prompt and look for an entry that includes C:Program FilesJavajdk1.6.027bin. Check that the version number 1.6.027 matches the one you installed—Oracle updates Java periodically and you might have a more recent version.

For executing any java program, you need to
  • Install the JDK if you don't have installed it, download the JDK and install it.
  • Set path of the jdk/bin directory. http://www.javatpoint.com/how-to-set-path-in-java
  • Create the java program
  • Compile and run the java program
Java

Creating Hello World Example

Let's create the hello java program:

Test it Now

save this file as Simple.java

To compile:javac Simple.java
To execute:java Simple

Compilation Flow:

When we compile Java program using javac tool, java compiler converts the source code into byte code.

Parameters used in First Java Program

Let's see what is the meaning of class, public, static, void, main, String[], System.out.println().

  • class keyword is used to declare a class in java.
  • public keyword is an access modifier which represents visibility. It means it is visible to all.
  • static is a keyword. If we declare any method as static, it is known as the static method. The core advantage of the static method is that there is no need to create an object to invoke the static method. The main method is executed by the JVM, so it doesn't require to create an object to invoke the main method. So it saves memory.
  • void is the return type of the method. It means it doesn't return any value.
  • main represents the starting point of the program.
  • String[] args is used for command line argument. We will learn it later.
  • System.out.println() is used to print statement. Here, System is a class, out is the object of PrintStream class, println() is the method of PrintStream class. We will learn about the internal working of System.out.println statement later.
Parameters

To write the simple program, you need to open notepad by start menu -> All Programs -> Accessories -> notepad and write a simple program as displayed below:


As displayed in the above diagram, write the simple program of java in notepad and saved it as Simple.java. To compile and run this program, you need to open the command prompt by start menu -> All Programs -> Accessories -> command prompt.

To compile and run the above program, go to your current directory first; my current directory is c:new. Write here:
To compile:javac Simple.java
To execute:java Simple

How many ways can we write a Java program

There are many ways to write a Java program. The modifications that can be done in a Java program are given below:

1) By changing the sequence of the modifiers, method prototype is not changed in Java.

Let's see the simple code of the main method.

2) The subscript notation in Java array can be used after type, before the variable or after the variable.

Let's see the different codes to write the main method.

3) You can provide var-args support to the main method by passing 3 ellipses (dots)

Let's see the simple code of using var-args in the main method. We will learn about var-args later in Java New Features chapter.

Java Command Line Tools

4) Having a semicolon at the end of class is optional in Java.

Let's see the simple code.

Download Java Program Command Line Parameters Free

Valid java main method signature

Invalid java main method signature

Download Java Program Command Line Parameters Free Version

Resolving an error 'javac is not recognized as an internal or external command'?

If there occurs a problem like displayed in the below figure, you need to set path. Since DOS doesn't know javac or java, we need to set path. The path is not required in such a case if you save your program inside the JDK/bin directory. However, it is an excellent approach to set the path. Click here for How to set path in java.


Command-Line App Selection

Ninite Pro supports command-line app selection. This lets youuse Ninite very much like a version of Debian or Ubuntu'sapt-get forWindows.

For example, here's a command to silently install Firefox, Skype, andboth the NPAPI and ActiveX versions of Flash Player:

The installation status is written to report.txt for later review.

You can name one or more apps to install after the /select switch.Here's the list of supported applications and their /select names.You can also get a list of available apps and their latest versions by running:

You can use the /exclude switch to exclude applications when using /updateonlyor /audit mode. The following command updates all applicationsthat are out of date, except for Java and Python:

Please note that the /exclude switch is only useful in combination with/updateonly or /audit. If you're already using /select to pick specific appsyou would exclude an app by simply not listing it after your /select switch.

These features are only available in Ninite Pro Classic.

We're working on documentation for the new Pro web interface. For now the available help for that is inline in the interface.

Get a Free Trial or Learn more about Ninite Pro