Random Numbersz?

[PeterFeng]

public class mainMemory {

public static void main(String[] args) {
int frag1=100, frag2=200, frag3=300, frag4 ;
frag4=frag1+frag2+frag3;
// TODO, add your application code
System.out.println("Internal Frag: " +frag4 +" Kb");
}


}


Hi, I need a little help here, as u can see from the code above, frag4 is the combination of frag1+frag2+frag3. How do I set a random number to frag1, frag2, frag3? in addition the random number must not be greater than 999

[Eranga]

Did you read anything about random numbers on the web.

Read this page

[PeterFeng]

dun really understand what they meant. any good webbies that i could have hands on?
I'll repost this in right forums

[Eranga]

All what you need are there at the time. Or else go to the Suns' tutorial.

[neilcoffey]

See the java.util.Random class. I also have a few web pages discussing random numbers in Java, and some pitfalls to be aware of.

The main thing that people get wrong when they use the Random class (and actually various other classes) is simply that they make things up rather than reading the documentation. Typical things that people get wrong:
- they create a new Random object for every single random number they need; don't do that: instead, create a single Random object and re-use it
- they don't use the appropriate method; for example, if you need a number between 0 and 1000, then call nextInt(1000): do not do the following

// This is WRONG!!
int n = Math.abs(r.nextInt()) % 1000;

[Eranga]

No need to re-post your question again. Please hang on with this.

And also search our forum. This question we have discussed several times.