Trying to rewrite the main method to use as few lines of code as possible

**jc100** · September 26th, 2013, 05:49 PM

Good afternoon everyone. I have an assignment in which I have to rewrite the following code into as few lines as possible and am wondering if anyone could offer any suggestions. The original code is:

public static void main(String[] args)
String s;
    boolean b;
    JOptionPane jop;
 
    jop = new JOptionPane();
 
    s = jop.showInputDialog("Enter your email address");
    b = s.matches(".*@.*\\..*");
    if (b)
    {
        System.out.println("Address Appears Valid");
    }
    else
    {
        System.out.println("Address is Invalid");
    }
}

So far I have condensed it to the following and am wondering if anyone could offer any suggestions to further reduce it into one line of code. Thank you in advance for any suggestions!

public static void main( String[] args )
{
   String s = JOptionPane.showInputDialog("Enter your email address");
 
   System.out.println(s.matches(".*@.*\\..*") ? "Address Appears Valid" : "Address is Invalid" );
}

**helloworld922** · September 26th, 2013, 05:59 PM

It's silly to try and write as few lines as possible because Java code doesn't really care about the concept of "lines": you can put everything into one line and barring line comments, have it work just as fine.

public static void main( String[] args ){String s = JOptionPane.showInputDialog("Enter your email address");System.out.println(s.matches(".*@.*\\..*") ? "Address Appears Valid" : "Address is Invalid" );}

Alternatively, don't store the result into s and just use it directly.

Some of these simplifications will lead to poor code formatting, here are the simplifications I would make for writing "good" code:

1. Don't need the boolean b.
2. Use JOptionPane.showInputDialog()

public static void main( String[] args )
{
   String s = JOptionPane.showInputDialog("Enter your email address");
 
   if(s.matches(".*@.*\\..*"))
   {
      System.out.println("Address Appears Valid" );
   }
   else
   {
      System.out.println("Address is Invalid");
   }
}

**jc100** · September 26th, 2013, 06:09 PM

I'm supposed to rewrite all the code within the main method and reduce it to as few lines as possible, the goal being the code within the main method being reduced to one line. So I am wondering if there is a way to somehow combine the following two lines of code into one line of code and still achieve the same result:

String s = JOptionPane.showInputDialog("Enter your email address");
 
System.out.println(s.matches(".*@.*\\..*") ? "Address Appears Valid" : "Address is Invalid" );

**helloworld922** · September 26th, 2013, 06:33 PM

Yes, don't store the result into s and just use it directly. I wouldn't suggest doing this in practice, though as your line will become way too long and unreadable.

**jc100** · September 26th, 2013, 08:28 PM

Thanks!

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