Exception, Unicode and Double checking and printing Exercise

• Write a program that ask the user for the number to print as a unicode character.
• If the user enters a letter, tell the user they entered a letter instead of a number.
• Print the number as a unicode character by casting it to a char.
• Divide the number by 3. three times. Then multiply that result back by 27. Print the result with only 2 decimal places using the DecimalFormatter class
• Compare the final result to the original number to see whether they are the exact same number exactly.
• Compare the final result to the original number to see whether they are within +/- .001 of each other.

Reminders:

DecimalFormatter object knows: How to print decimals
Package to import: import java.text.DecimalFormat;
How to create a DecimalFormatter for your numbers:
DecimalFormat percentage2 = new DecimalFormat(“0.00%”);

How to use a DecimalFormatter to print to your screen:
System.out.println(percentage2.format(.308)); // will print 30.80%
Different format options:
0 = required position
# = show it if you have it
% = make it a % (mult by 100)
E = E notation (scientific)

Try/Catch:

• You can stop executing a method with a throw command.
  • Create an exception to throw – new IllegalArgumentException(“tell about the error”);
• You can catch the error in the calling program using a try /catch block.

  Try{}
  Catch{}