Task #1 character and string class methods


Task #1 Character and String Class Methods

2. In the Time.java file,add conditions to the decision structure which validates
the data. Conditions are needed that will
a) Check the length of the string
b) Check the position of the colon
c) Check that all other characters are digits
3. Add lines that will separate the string into two substrings containing hours and
minutes. Convert these substrings to integers and save them into the instance
4. In the TimeDemo class,add a condition to the loop that converts the user’s
answer to a capital letter prior to checking it.
5. Compile,debug,and run. Test out your program using the following valid
input:00:00,12:00,04:05,10:15,23:59,00:35,and the following invalid input:

Task #2 StringTokenizer and StringBuilder classes
1. Copy the file secret.txt(code listing 10.3) from www.aw.com/cssupportor as
directed by your instructor. This file is only one line long. It contains 2
2. Write a main method that will read the file secret.txt,separate it into word
3. You should process the tokens by taking the first letter of every fifth word,
starting with the first word in the file. These letters should converted to capitals,
then be appended to a StringBuilder object to form a word which will be printed
to the console to display the secret message.

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