How Does Java's `main` Method Handle Command-Line Arguments (String[] args)?
Exploring the String[] Args Parameter in Java's Main Method
In Java, the main method serves as the entry point for any program. It typically includes the following declaration:
public static void main(String[] args)
1. Understanding String[] args:
The String[] args parameter is an array of String objects that represents the command-line arguments passed to the program when it is executed. Each element in the array corresponds to a single command-line argument.
2. Utilizing Command-Line Arguments:
Command-line arguments are useful when you want to allow users to customize the behavior of your program. For example, you could use args to specify:
- Input files or directories
- Configuration parameters
- Logging options
Example:
Consider the following code:
public class ArgsExample { public static void main(String[] args) { for (int i = 0; i <p>If you execute this program in your terminal as:</p><pre class="brush:php;toolbar:false">C:/ java ArgsExample one two
The args array will contain the elements ["one", "two"]. When you run the program, it will print:
C:/ java ArgsExample one two one two C:/
This demonstrates how you can retrieve and process command-line arguments in Java.
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