[ankitaredrose]

I have set of numbers like [1000,2000,3000,4000]

Now I have to select one from above this numbers in Java how to do it? help me

[raghav.naganathan]

Well, you have those numbers in an array I presume?

Here's how you go about it...

First you need to import the following...

java.util.Random;

Then, you need to generate a random number something like this.

Random num = new Random();
//code for getting a value from 0 to 3 and store it as index.

Now use the index variable to call your array value.

Edit :Well, this was just my take on solving the problem...I believe there are much better methods to go about this problem.

regards,
Raghav

This post has been edited by raghav.naganathan: 25 January 2013 - 04:51 AM

[Ryano121]

raghav.naganathan, on 25 January 2013 - 12:46 PM, said:

Edit :Well, this was just my take on solving the problem...I believe there are much better methods to go about this problem.

I disagree, think that you have the the best there

[ccdan]

raghav.naganathan, on 25 January 2013 - 01:46 PM, said:

[code]java.util.Random;

Then, you need to generate a random number something like this.

Random num = new Random();

you're almost right, but your code is incomplete.. you have to add something like this:

int randomArrayIndex = num.nextInt(ar.length); // where ar is a typical fixed size array []

or

int randomArrayIndex = num.nextInt(ar.size()); // where ar is an ArrayList

or, without importing Random:

int randomArrayIndex = (int) (Math.random() * b.length); // respectively * b.size() for ArrayList

This post has been edited by ccdan: 25 January 2013 - 05:30 AM

[ankitaredrose]

Thanks I hope this works