String to int in Java

Question

I have a string named string1 that I read from a file. It's actually a number that I'm reading from the file. I now need to use that number in a random number generator. How can I do that?

String string1 = in.readLine();
Random generator = new Random();
int x = generator.nextInt(string1);

That obviously fails but I can't figure out how to make it work.

possible duplicate of How to convert string to int in Java?

Daniel Fischer
– Daniel Fischer

2012-01-16 14:32:42 +00:00
Commented Jan 16, 2012 at 14:32 — Daniel Fischer
– Daniel Fischer, Commented Jan 16, 2012 at 14:32

Haphazard · Accepted Answer · 2011-05-06 14:07:03Z

4

Try int int1 = Integer.parseInt(string1);. Just make sure you do some error handling around that in case it is not an integer!

answered May 6, 2011 at 14:07

Haphazard

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dacwe · Accepted Answer · 2011-05-06 14:06:10Z

2

Use Integer.parseInt(String s):

int max = Integer.parseInt(in.readLine());
Random generator = new Random();
int x = generator.nextInt(max);

answered May 6, 2011 at 14:06

dacwe

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Comments

Flo · Accepted Answer · 2011-05-06 14:06:47Z

2

int num = Integer.valueOf(stringtext).intValue();

Next time google it.

answered May 6, 2011 at 14:06

Flo

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4 Comments

Jimmy D Over a year ago

But if everyone did that, there would hardly be a reason for this site to exist. See how that works? This is a question/answer forum.

AZ_ Over a year ago

yeah but this is very very simple question :) I guess

AZ_ Over a year ago

try this :) google.com.pk/… a very simple query

I82Much Over a year ago

@JJD I disagree. This site would not disappear if everyone googled for their answers first. Instead, the ratio of interesting/challenging questions to cruft would dramatically increase.

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