CODEWITHSUNDEEP
javaarraysstringintreturn
Sarah Mohamed
Sarah Mohamed

Reputation: 33

Java - Return an integer array

In this function, I want to get text in the file then convert it from string to decimal values, by add this text to an array apply some loops and put the result to array of integer. While returning this integer array it gives me an error "cannot find symbol variable integerArray"

    int[] inputfile () throws Exception{
     BufferedReader br = null;
       String sCurrentLine;
       String message;
       br = new BufferedReader(new FileReader("\input.txt"));
       while ((sCurrentLine = br.readLine()) != null) {
           message=sCurrentLine.toString();
       char[] messageArray=message.toCharArray();

        int[] integerArray = new int[messageArray.length];
           for(int i=0; i<messageArray.length; i++)
               integerArray[i] = (int)messageArray[i];

       }
       return integerArray;
   }

How can I solve it?

Update: I declared variable integerArray outside the while loop, but it always returns the null value, Is there any possible way to return integerArray as int values? because Arrays.toString(integerArray) returns String representation of that array

    int[] inputfile () throws Exception{
     BufferedReader br = null;
       String sCurrentLine;
       String message;
       br = new BufferedReader(new FileReader("\\input.txt"));
       int[] integerArray = null
       while ((sCurrentLine = br.readLine()) != null) {
           message=sCurrentLine.toString();
       char[] messageArray=message.toCharArray();

        int[] integerArray = new int[messageArray.length];
           for(int i=0; i<messageArray.length; i++)
               integerArray[i] = (int)messageArray[i];

       }
       return integerArray;

Upvotes: 1

Views: 9500

Answers (3)

Ramanlfc
Ramanlfc

Reputation: 8354

integerArray is a local variable in the while loop , it's inaccessible outside it. Declare it outside the loop

int[] integerArray =null ;
while ((sCurrentLine = br.readLine()) != null) {
    // other code
    integerArray   = new int[messageArray.length];
        // other code
}

Upvotes: 4

dryairship
dryairship

Reputation: 6077

Your integerArray is inside the while loop. Declare it outside the loop and change its value inside it, then it will work.

Upvotes: 4

Eran
Eran

Reputation: 393936

int[] integerArray must be declared before the loop, in order for you to be able to return it after the loop.

int[] inputfile () throws Exception{ 
   int[] integerArray = null;
   BufferedReader br = null;
   String sCurrentLine;
   String message;
   br = new BufferedReader(new FileReader("\input.txt"));
   while ((sCurrentLine = br.readLine()) != null) {
       message=sCurrentLine.toString();
       char[] messageArray=message.toCharArray();
       integerArray = new int[messageArray.length];
       for(int i=0; i<messageArray.length; i++)
           integerArray[i] = (int)messageArray[i];
   }
   return integerArray;

}

Upvotes: 3

Related Questions