Seperating items within a string

[DtheK]

Hi,

I just wanted to know if there was a way to seperate items within a string, say, with a space in between each different input.

For example,

in the string "16 15" if I wanted to store 16 in one variable and 15 in another how would I go about doing this

 

[Jimmy]

Create two different fields?
Or an array?
Or a collection?

You'll need to provide some code for the most effective way to do this.

 

[SuF]

http://java.sun.com/j2se/1.4.2/docs/api/java/lang/String.html#split(java.lang.String)

 

[DtheK]

Okay, here's some sample code:

import javax.swing.JOptionPane;
public class test
{
public static void main(String[] args)
{
String s = JOptionPane.showInputDialog("Enter the data with a space in between each number");
}
}

Say I put "1 2 3 4" as the input and wanted to store 1 in variable a, 2 in variable b, etc.

 

[Jimmy]

Okay, here's some sample code:

import javax.swing.JOptionPane;
public class test
{
public static void main(String[] args)
{
String s = JOptionPane.showInputDialog("Enter the data with a space in between each number");
}
}

Say I put "1 2 3 4" as the input and wanted to store 1 in variable a, 2 in variable b, etc.

Then use the split() method, as SuF stated.

 

[SuF]

^That would store the input in a string array. Then you have to cast it to int or float or what ever and make sure it all works and discard any input that doesn't...

 

[Jimmy]

^That would store the input in a string array. Then you have to cast it to int or float or what ever and make sure it all works and discard any input that doesn't...

Cast the java.lang.String[] or a primitive type? >_<

I'm sure what you meant was, that you need to get a single java.lang.String element of the array, and call the corresponding method of the corresponding wrapper class to get a primitive type from the String (Object's cannot be cast to primitive types, as primitive types are not Objects).

In pseudo-code

String input = JOptionPane.showInputDialog(...);
if(input != null) {
    String[] data = input.split(" ");
    for(String s : data) {
        try {
            int i = Integer.parseInt(s);
            //Do whatever you need with the input
        } catch (RuntimeException e) { //I cbf to lookup the actual name
            //Execption-handling code here
        }
    }
}

 

[SuF]

^Basically what I ment.