public class NewJFrame extends javax.swing.JFrame {

   ArrayList<Integer> colours = new ArrayList<Integer>();
   BufferedReader br = null;
/**
 * Creates new form NewJFrame
 */
public NewJFrame() {
    int word=0;

    try {
        br = new BufferedReader(new FileReader("Booklist.txt"));

        while ((word == br.read())){
            colours.add(word);
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            br.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }

    initComponents();
}

static public Boolean linearSearch(ArrayList colours, String B) {
    for (int k = 0; k < A.length; k++) {
        if (A[k].equals(B)) {
            return true;
        }
    }
    return false;
}