How to convert ASCII to int?

int asciiValue = 53;
int numericValue = Character.getNumericValue(asciiValue);

System.out.println(numericValue);

int yourInt = Integer.parseInt(yourString);

http://www.cse.wustl.edu/~kjg/java/api/java/lang/Integer.html#parseInt%28java.lang.String%29

Use:

try
{      
  int i = Integer.parseInt(StringValue);
}
catch (NumberFormatException nfe)
{
  System.out.println("NumberFormatException: " + nfe.getMessage());
}