PRB: ERROR: java.lang.ArrayIndexOutOfBoundsException (173788)

MORE INFORMATION

When executing your Java program under the IDE that expects Command-Line or Program arguments, you can select Settings from the Project menu, click the Debug tab, and select Category:Program arguments to set the program arguments. If you are using Visual J++ 1.0, then you can select Settings from the Build menu, click the Debug tab, and select Category:Program Arguments to set the program arguments.

Steps to Reproduce Behavior

1. Create a Java Project and include the following code snippet in it.
2. The following code snippet was taken from "Learn Java Now":

         import java.io.*;
   
         class App1_2
         {
            public static void main(String args[])
            {
   
         // uncomment the next line to make the program catch the exception:
         //  try {
                int nMonth = Integer.parseInt(args[0]);
             int nDay   = Integer.parseInt(args[1]);
             int nYear  = Integer.parseInt(args[2]);
   
             int nDayInYear = 0;
   
             for (int nM = 0; nM < nMonth; nM++)
             {
              switch(nM)
              {
   
              case 4: case 6: case 9: case 11:
                 nDayInYear +=30;
                 break;
   
              case 2:
                 nDayInYear +=28;
   
                 if (((nYear % 4) == 0) && ((nYear % 100) != 0))
                 {
                  nDayInYear++;
                 }
                 break;
   
                 default:
                 nDayInYear += 31;
              }
             }
   
             nDayInYear += nDay;
   
             System.out.print (nMonth + "-" + nDay + "-" + nYear);
             System.out.println (" is day number "
                     + nDayInYear
                     + " in the year");
            }
   
         // uncomment this section to make the program catch the exception:
         // } catch (ArrayIndexOutOfBoundsException e) {
         //   System.out.println("This program takes 3 parameters: ");
         //   System.out.println("  month day year.");
         // }
   
         }
   					

3. Build the project and Execute it under the IDE.
4. The ArrayIndexOutofBoundsException error appears.