Dice Rolls

Newbie & Debugging Questions
#1

wondering if there is an easy way to get dice rolls. not just six sided but all of them.

#2

Could you provide a little more information? Are you simply looking to get a random number as if you were rolling dice?

If so, it is just generating a random number with [icode]rnd.nextInt(numberOfSides - 1) + 1;[/icode]…

#3

as long as I can choose number of sides I’m good.

#4

Is this for homework? It would be beneficial to know how to use Random (and Java in general)

#5

no I’m kind of teaching myself. I dug out my old D&D books and I’ve been brainstorming on ideas for a command line game.

#6

You can also use Math.random()


public static int random(int x)
{
    return (int) (Math.floor(Math.random() * x));
}

x is the no. of sides here.

#7

thanks!

#8

So I tinkered with it for a while and came up with this.

package com.dungeon.java;

public class Dungeon {
	public static void main(String[] args) {
		int sides = 20;
		int AC = 12;

		System.out.println("Armor class of enemy: " + AC);
		System.out.println("Your roll: " + Math.floor(Math.random() * sides));
		if(Math.floor(Math.random() * sides) >= AC)
			System.out.println("HIT!");
		else
			System.out.println("MISS!");
	}	
}

The problem is when I roll a hit it sometimes says “MISS!” and vice versa.

or this:

package com.dungeon.java;

public class Dungeon {
	public static void main(String[] args) {
		int sides = 20;
		double AC = 12;

		System.out.println("Armor class of enemy: " + AC);
		// System.out.println("Your roll: " + Math.floor(Math.random() * sides));
		if(Math.floor(Math.random() * sides) >= AC)
			System.out.println(Math.floor(Math.random() * sides) + " HIT!");
		else
			System.out.println(Math.floor(Math.random() * sides) + " MISS!");
	}	
}
#9

Because you are generating a new value each time you call it.

store the value of the roll into a variable


int roll = Math.floor(Math.random() * sides);
#10 
package com.dungeon.java;

public class Dungeon {
	public static void main(String[] args) {

		int sides = 20;
		double AC = 12;
		double roll = Math.floor(Math.random() * sides);

		System.out.println("Armor class of enemy: " + AC);
		System.out.println("Your roll: " + roll);
		if(roll >= AC)
			System.out.println("HIT!");
		else
			System.out.println("MISS!");
	}	
}

Brilliant. thanks again.