Thread: Java/Processing v 1.2/1.5 coding help

I have my final assignment for comp sci due Mon and having issues resolving a string/array arrangement. Basically am referencing a text file for data (as a string), and calling it into an array. Then splitting the individual lines of the generated arrays into strings.

I'm getting a null pointer error if I try to reference an index of the array, from all accounts I've written it down on paper and it should be pointing to the right places but can't see the data. If I remove the array reference and hard code the figures it works. I just can't get the reference to work. Have added the code below plus the text as included in the .txt file.

Thanks if anyone can help.

CODE
boolean fills = false;
int upto;
int currentGame;
String puzzle;
String gameNo;
String game1Size;
String[] sizes1; //if the [] is removed a string/array unresolved error occurs
String game1Dataa;
String game1Datab;

void setup () {
size (300, 300);
fill (255);
String[] puzzle = loadStrings("ass3.txt");
String gameNo = puzzle[0];
String game1Size = puzzle[1];
String[] sizes1 = split(game1Size, ' ');
String game1Dataa = puzzle[2];
String[] dataa1 = split(game1Dataa, ' ');
String game1Datab = puzzle[3];
String[] datab1 = split(game1Datab, ' ');
}
//
void draw() {
for (int i = 1; i <= int(sizes1[0]); i++) {
// if a num in inserted into the int( ) there is no null pointer error.
for (int j = 1; j <= int(sizes1[1]); j++) {
// if the [ ] is removed it becomes a operator <= error.
rect (j+j*20, i+i*20, 20, 20);
}
}
}

void mousePressed (){
for (int i = 1; i<= 10; i++) {
for (int j = 1; j<=10; j++) {
if (mouseX > j+j*20 && mouseX < j+(j+1)*20 && mouseY >i+i*20 && mouseY < i+(i+1)*20){
println (mouseX + ", " + mouseY);

fills = !fills;
if (fills) {
fill(0);
} else {
fill(255);
}
}
}
}
}

TEXT
3
5 5
5 2 3 2 5
5 2 3 2 5
8 11
2 2 7 7 11 9 4 4
3 2 6 5 5 4 5 5 6 2 3
1 1
1
1

PHP Code:

    int         m_currentDataLine;    // master data line index
    String[]     m_fileData;            // Master data read in by loadStrings

    // Pull one line string from master data array
    // and inc currentline index
    String getNextLine()
    {
        String retLine = null;
        if(null != m_fileData)
        {
            if(m_currentDataLine < m_fileData.length)
            {
                retLine = m_fileData[m_currentDataLine];
                m_currentDataLine++;
            }
        }
        return retLine;
    }

    void setup()
    {
        m_currentDataLine = 0;

        // Load up data arrya
        m_fileData = loadStrings("ass3.txt");
    }

    void draw()
    {
        // Do i have some data
        if(null != m_fileData)
        {
            //Yep! process it....

            // Reset current master data line
            m_currentDataLine = 0;

            // Get num games line from file data loaded in setup
            String currLine = readNextLine();

            // Convert num games string to an integer type
            int numGames = Integer.valueOf(currLine);

            // Loop through games
            for(int i = 0; i < numGames;i++)
            {
                System.out.println("Game number " + i +1);

                // Read game header line
                currLine = readNextLine();

                // Get individual data line element counts
                String[] datalines = split(currLine, ' ');

                // Get number of data lines
                int numDataLines = datalines.length;

                // Now process the data lines
                for(j = 0 ; j < numDataLines;i++)
                {
                    // Read in the data line  elements;
                    currLine = readNextLine();

                    // Split the elements
                    String[] dataElements = split(currLine, ' ');

                    // Get number of elements for current data line
                    int numElements = Integer.valueOf(dataLines[j]);
                    // could just as easily be
                    // int numElements = dataElements.length;

                    // Process elements
                    for(n = 0; n < numElements;n++)
                    {
                        // Get each element
                        int element = Integer.parseInt(dataElements[n]);

                        // Do whatever with data element
                        System.out.println(" Data element = " + element);
                    }
                }
            }
        }
    } 


You need to keep track of what line you are upto from the master data.
And convert you Strings to integers where necessary

Hard to explain over a post ... but here is an example based on your code
I have not compiled it .. so maybe some typo's in there... and hardly any error checking

This example will
- Load the master data once
- Each call to draw
Reset the data line to the start
Process the whole master data printing out the game id and elements

Ps not really php code code.. can't seem to post formatted text any other way