6 replies to this topic

[heartybowl]

So for my homework assignment, my teacher wants us to convert a number to
binary, octal, and hex. So I asked him how I am suppose to do that and he told me to go here -> Integer (Java Platform SE 6)

Then I see this thing that says "toBinaryString" but I don't really know how to apply it. It's not very specific on how to use it.

here's what I have so far

Scanner cin = new Scanner(System.in);

System.out.print("Please enter an integer: ");
int num = cin.nextInt();
int binary = Integer.toBinaryString(num);


and it's not compiling

[sourlemon]

Did you check what Integer.toBinaryString(num) returns?

[LuthfiHakim]

Could you do the conversion by hand? If you could, then it's easy to write the codes. No need to peek other's. :)

[heartybowl]

nevermind i fixed that problem but now i ran into a new one.

I need to tell the user to enter two integers separated by a space. for example, "234 83487".
and then I need to convert that string into numbers and then I need to add those two integers.

So this is the code that I used. It compiles fine but when i click run, it encounters an error and it is not able to convert the two strings that I enter, into two digits.

System.out.print("Enter two integers, separated by a space: ");
String integers = cin.nextLine();
double two = Double.parseDouble(integers);

help me please

[sourlemon]

Don't forget you two numbers in a line. I didn't double check, but it looks the problem you have is passing in something "234 566", which Double.parseDouble didn't know how to parse. Read the first number first, parse it, then repeat it with the second one.

[wim DC]

You can also split the string:

String integers = cin.nextLine();

String[] numbers = integers.split(" ");

numbers[0] contains the first number (as string).
numbers[1] contains the second number (as string).

[heartybowl]

thanks for the advice sourlemon. i fixed it. the problem was that I was using "nextLine" instead of just "next".

and wim DC, I think that's a little bit too advanced for me lol. My class isn't quite there yet.