Please explain this is java not C++

Acme Parts runs a small factory and employs workers who are paid one of three hourly rates depending on their shift: first shift, $17 per hour; second shift, $18.50 per hour; third shift, $22 per hour. Each factory worker might work any number of hours per week; any hours greater than 40 are paid at one and one-half times the usual rate. In addition, second- and third-shift workers can elect to participate in the retirement plan for which 3% of the workers gross pay is deducted from the paychecks.

Write a program that prompts the user for hours worked, shift, and, if the shift is 2 or 3, whether the worker elects the retirement (1 for yes, 2 for no). Display:

Hours worked

Shift

Hourly pay rate

Regular pay

Overtime pay

Total of regular and overtime pay

Retirement deduction, if any

Net pay.