programming a java calculator Solution

Write a Java program that calculates and displays the results of addition, subtraction,
multiplication, division,
modulus, bitwise &, or bitwise |
operation on two integer values input
by the user. The program should prompt the user for the two integers and the operation to be performed. Here is a sample run:

Enter
the
first integer: 24
Enter the second integer: 4
Enter the operation: +
The results of 24 + 4 is 28

I know how to declare a variable but I have no idea where to learn the rest. Help?!? I need to understand what each line of code does. The same goes for the next

Write a Java program
prompts a user to enter demographic information including
year of birth (values 1900
-
2014),
month of birth (values 1
-
12), day (value of 1
-
31) of birth,
latitude and longitude of home address current grade point average (GPA). Here is a sample run:
Enter your birth year (1900
-
2014): 1989
Enter your birth month (1
-
12): 10
Enter the day of the month
of your birth (1
-
31): 15
Enter the latitude of your home address: 38.3658
Enter the longitude of your home address: 75.5933
Enter your current GPA (0.0
-
4.0): 3.8
******* Thank you for completing our survey ***
*******************************
You have
entered the following data:
Birthday:
October
1
5
, 1989
Address:
Latitude
38.3658°,
Longitude
75.5933°
Current GPA: 3.
9
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