Programming Exercise #$09\_2$:

Instruction:

$1.$ Use Notepad to create new text file named $$EX$09\_2.$java$.$ Enter the following two lines $($be sure to replace

YourFullName with your full name$)$:

$293$

Java Programming $$ Penniel P$.$ Wu$,$ PhD $(2024)$

$//$ FileName: EX$09\_2.$java

$//$ Programmer: YourFullName

$2.$ Next to the above two lines, write a Java code that uses an input dialog box to ask the user to enter a sentence

that may or may not contain a substring, $$Ruby$.$

$3.$ Use the an appropriate Java method $($e$.$g$.$contains$())$ to check if the given string contains the word $$Ruby$.$ If

not, display $$The substring 'Ruby' is not fund.$$ is a message box. If found, replace every occurrence

of the work $$Ruby$$ with $$Java$,$ and then display the revised sentence in a message box.

$4.$ Test the program three times. First, test the program without the $$Ruby$$ substring. Second, test the program

with one occurrence of the $$Ruby$$ substring. Third, test the program with two or more occurrences of the

$$Ruby$$ substring.