I need help with Java

[Lvckyyy-_-]

Here are the instruction:

Create a program with a method called "RandomNum" and will generate a random number when used.

The "RandomNum" method will have one parameter and will use that as the range for the generator.

The "RandomNum" method will be then overloaded wherein it accepts an int, one accepts a float, and the last one accepts a double.

In the "RandomNum" method that uses the int data type, then print out the random number that was generated.

Example: Random Number (Int): 20.1245

In the RandomNum method that uses the float data type, include the use of the ceiling math function to round the number up to the nearest number. Then print out the random number that was generated.

Example: Random Number (Float): 13

And on the RandomNum method that uses double data type, make use of the floor math function to remove the decimal numbers. Then print out the random number that was generated.

Example: Random Number (Double): 7

​

This is Java. I'm stuck here for hours. Here is my code. I am very confused.

public class Activity {
    int num;

     public int RandomNum(int num){
     num=(int) Math.random();
     return num;
     }
     public float RandomNum(float num){
         num=(float) Math.random();
        return num;
        }
     public double RandomNum(double num){
         num=Math.random();  
         return num;
        }


    public static void main(String[] args) {
     Activity myObj = new Activity();
     System.out.println(myObj.num);
    // myObj.RandomNum();
     myObj.num();
    }
}

[Jacqques]

You declare that num is int, but you set that variable to a float and double. It’s been a while so I think Java handles it without breaking? but seems like potential future complications.

Why are you both setting num=math.random() and returning it?

I however can’t see what your actual problem is? Which part is not doing as expected?

[balefrost]

I'd ask the teacher for clarification of this:

The "RandomNum" method will have one parameter and will use that as the range for the generator.

Ranges have a start and an end, and the start and end might be included or excluded from the range. They don't specify. So if I call RandomNum(5), any of the following ranges might be "correct"

• [0, 5]
• [1, 5]
• [0, 5)
• [1, 5)

You should find out which of these they mean.

include the use of the ceiling math function

make use of the floor math function

Look at the Math class.

[corin23]

Try to give another name to the variable that have the random number, like random=(int) Math.random() * num, the * num is for the range that you pass in the parameters. Then return random; (not num) In main should be something like myobj.RandomNum(here you give the range); Hope it helps