Top 10 file size in c directory

import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.lang.*;


public class Search {
    static long[] fileSize = {0,0,0,0,0,0,0,0,0,0};
    static String[] fileName = {"", "","","","","","","","","",};


        public static void main(String... args) {

            File[] files = new File("C:/").listFiles();

            iterateFiles(files);
            for (int x = 0; x < fileSize.length; x ++){
                System.out.println("The finished list of top 10 file sizes");
                System.out.println(fileName[q] + " has a size of: " + fileSize[x]);
            }
        }

        public static void iterateFiles(File[] files) {

            for (File file : files) {
                if (file.isDirectory()) {
                    if(file.listFiles() != null){
                    iterateFiles(file.listFiles()); // Calls same method again.
                    }
                } else {
                    sortFiles(file.length(), file.getAbsolutePath());
                }
            }
        }

        public static void sortFiles(long x, String b){
            for (int y = 0; y < 10; y++){
                if(fileSize[y] < x){
                    for(int z = y; x < 9; z++){
                        fileSize[z] = fileSize[z+1];
                        fileName[z] = fileName[z+1];
                    }
                    fileSize[y] = x;
                    fileName[y] = b;
                    System.out.println("\n Updated List:");
                     for (int q = 0; q < fileSize.length; q ++){
                            System.out.println(fileName[q] + " has a size of: " + fileSize[q]);
                        }
                    break;

                }
            }
    }

}