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JayLo

Mon Apr 05, 2004 5:13 pm


Is there a strintok/intstrok function in java?

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I was just wondering if there was a function to check if a string could be parsed as an integer/double or vice versa. Any takers?  :o


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nate

Mon Apr 05, 2004 6:03 pm



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%Going from string - integer
int number = Integer.parseInt("10");

%Going from string - double
double number = Double.parseDouble("10.2");

%Going from double or integer - string
String word = number.toString();


Hope that helps you


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JayLo

Mon Apr 05, 2004 9:05 pm



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thanks for that review, nate. yes, i know that integer.parseint (mind my capitalization) is to parse strings to int, but i was asking for a command to CHECK if a string variable can be parsed.

for example 
String reply;
reply = JOptionPane.showInputDialog("This sucks");
insert checker here.


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wtd

Mon Apr 05, 2004 9:42 pm



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import java.lang.*;
import java.io.*;
import java.util.*;
import java.util.regex.*;

class Test {
   public static boolean checkForIntegers(String input) {
      Pattern intPattern = Pattern.compile("\d+");
      Matcher intMatcher = intPattern.matcher(input);
      return intMatcher.matches();
   }

   public static void main(String[] args) {
      BufferedReader keyboard = new BufferedReader(
         new InputStreamReader(System.in));
      String userInput = keyboard.readLine();
      if (checkForIntegers(userInput))
         System.out.println("\"" + userInput + "\" contains an integer");
      else
         System.out.println("\"" + userInput + "\" does not contain an integer");
   }
}


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nate

Mon Apr 05, 2004 9:47 pm



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oh, sorry!!
lol
i just read string - int and was like "Hey i know that".

Oh well, i learned something new. Thanks WTD