sdtin/command-line

**TorontoJava1984** · October 16th, 2011, 01:38 PM

I hope this is the right board to post this query on.

I am really new to Java and am struggling to differentiate between reading from stid and taking output from command line in putting it into a method input.

Where a command line would give the output of 6 integers, ie: 26, 62, 82, 27, 0, 0
and the opening of a method would be:

int main (int firstNum, int secondNum, int thirdNum, int fourthNum, int fifthNum, int sixthNum)

I would not know how to read the same numbers from stdin in a format such as:
26 62
82 27
0 0

Let alone taking these and inputting them into a method.

I have tried searching for a good introduction for this, yet have failed to find something that explains the difference effectively.

Again, I apologise if this is the wrong board, I only just started learning java as a hobbie this summer and it's all very new to me.

**helloworld922** · October 16th, 2011, 01:51 PM

stdin in Java is routed to the input stream System.in
The easiest way I know to read from stdin is use a Scanner object.

public static void main(String[] args)
{
    Scanner reader = new Scanner(System.in);
    int num1 = reader.nextInt();
    System.out.println("num1 = " + num1);
}

I'd recommend reading the The Java™ Tutorials, starting with the Covering the Basics section.

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