title: InputMismatchException on Scanner.nextInt
body: <p>I'm trying to use a Scanner to draw a rectangle in JFrame, but get these errors:</p>
  
  <pre><code> Exception in thread "main" java.util.InputMismatchException
   at java.util.Scanner.throwFor(Unknown Source)
   at java.util.Scanner.next(Unknown Source)
   at java.util.Scanner.nextInt(Unknown Source)
   at java.util.Scanner.nextInt(Unknown Source)
   at DrawerAutoRect.main(DrawerAutoRect.java:39)
  </code></pre>
  
  <p>My goal of this program is to choose the type of object to draw i.e.: lines, rectangles,o vals, and then input the parameters, i.e. if it's a rectangle I'm drawing, the input would be <code>r, 200,200,400,400</code> and for it to draw a rectangle with those dimensions on the JFrame. Then I'd just type "end" and it'd end waiting for objects to be input and drawn. </p>
  
  <pre><code>import java.awt.BasicStroke;
  import java.awt.Graphics;
  import java.awt.Graphics2D;
  import java.util.Scanner;
  import javax.swing.JFrame;
  
  public class DrawerAutoRect extends JFrame {
      public DrawerAutoRect(){
      setSize(1020,1020);
  }
  
  public static void paint(Graphics g, int a, int b,int c, int d)
  {
     Graphics2D g2 = (Graphics2D)g;
     g2.drawRect(a, b, c, d);
  }
  
  public static void main(String[] args) {
      int x1 = 100;
      int x2 = 100;
      int y1 = 50;
      int y2 = 50;
      Scanner s = new Scanner(System.in);
      String dim = s.next();
      while(dim!="end"){
          if(dim.equals("r")){
              x1 = s.nextInt();
              y1 = s.nextInt();
              x2 = s.nextInt();
              y2 = s.nextInt();
          }
      }
      paint(null, x1, y1, x2, y2);
      DrawerAutoRect r = new DrawerAutoRect();
      r.setDefaultCloseOperation(EXIT_ON_CLOSE);
      r.setVisible(true);
      //r.pack();
      r.setTitle("Tutorial");
  }
  </code></pre>