(JAVA) How to turn elements of a String Array into integers

[Ry]

Hey everybody. I working on a project for school that is due may 3rd, and right now I'm trying to turn the elements of a String array into integer values. please help me, i know it is only two or three lines of code at max but i just can't figure it out. Any help you can offer is deeply Appreciated, thanks.

for info on the project i working on go to: http://www.cs.uncc.edu/~rilson/2215/assignments/KnapEncrypt Instructions S05.html

here is my code so far, i am trying to turn the elements of encryptvalue[] into integers in the first while loop.
---------------------------------------------------------------------------
import java.util.*;
import java.io.*;

public class KnapEncrypt
{

public static void main (String[] args)throws java.io.IOException
{

FileReader fr = new FileReader (args[0]);
BufferedReader inFile = new BufferedReader (fr);
BufferedReader in = new BufferedReader (new InputStreamReader(System.in));


String line = inFile.readLine();
int value_index;
StringTokenizer tokens = new StringTokenizer(line);
String[] encryptvalue = new String[tokens.countTokens()];

int converted;
int total = 0;
value_index = 0;
int line_index = 0;



while (value_index < encryptvalue.length)
{
Integer.parseInt(encryptvalue[value_index]);
encryptvalue[value_index] = tokens.nextToken();
System.out.print(encryptvalue[value_index] + " ");
value_index++;

}

total = encryptvalue[1] + encryptvalue[0];
System.out.println(total);

/* ignore this stuff (for now)

while((line = inFile.readLine()) != null && line.length() != 0)
{

if (line.length() == 10)
{
System.out.println("input: " + line);

if (line.charAt(line_index) == '1')
{
total = total + encryptvalue[line_index];
}

else
{
total = total + 0;
}

System.out.println("output: " + total);
}

else
{
System.out.println("input: " + line);
}

line_index++;
}
*/


}
}

 

[C.Ingram]

Integer.parseInt(encryptvalue[value_index]);

parseInt doesn't change values in place. You'll need to create an Integer (or int, I suppose) and store the parsed value in to that. Right now you are just throwing it away.

 

[fitzjj]

yep what you have is fine but as CI says you need to create an integer to put the value into:

int theInteger;

...
...

theInteger =  Integer.parseInt(encryptvalue[value_index]);

The integer value of the string is now stored in "theInteger" for you to do whatever you like with it.

 

[mohoo]

my answer is the same as the upper