help writing a java application

Write a java application that takes an integer Celsius temperature as input
and converts it to its Fahrenheit equivalent.

The formula is
Fahrenheit = 9/5 Celsius + 32

*You will need to prompt the user to input the temperature in Celsius.
*After the Celsius temperature is input, read in the value and perform the conversion to Fahrenheit.
*Then, output the original, Celsius temperature along with the corresponding Fahrenheit equivalent. (Verify that your program displays the correct result to2 decimal places.)
*The application should include appropriate messages identifying each value.

You're lucky.

The very first Swing example (in the Oracle documentation) tells you exactly how.

Sorry for not completing your homework for you, please be more specific about exactly which aspect of your problem causes you trouble ?
You are struggling to prompt user ? You failed to read user input? You failed to convert integer or doubles to desired class structure ?
Please.