Array Merger Numerical Order 2016

import java.util.Scanner;
import java.util.Arrays;

public class Main {
  public static void main(String[] args) {

    Scanner scan =  new Scanner(System.in);

    int[] firstArray = new int[10000];

    System.out.println("Enter the values for the first array up to 10000 values, enter zero or a negative number to quit");
    int values = scan.nextInt();
    boolean check = true;

    while (check) {
      for (int x = 0; x < firstArray.length; x++) {
        if (values > 0) {
          firstArray[x] = values;
          values = scan.nextInt();
        } else {
         check = false;
        }//end of if/else
      }//end of for loop
    }// end of while loop

    System.out.println("Enter the values for the second array up to 10000 values, enter zero or a negative number to quit");
    int values2 = scan.nextInt();
    int[] secArray = new int[10000];
    boolean check2 = true;

    while (check2) {
      for (int y = 0; y < secArray.length; y++) {
        if (values2 > 0) {
          secArray[y] = values2;
          values2 = scan.nextInt();
        } else {
         check2 = false;
        }//end of if/else
      }//end of for loop
    }// end of while loop

    System.out.println("First Array:");
    for(int z = 0; z < firstArray.length; z++) {
      if(firstArray[z] > 0) {
        System.out.print(firstArray[z] + " ");
      }
    }//end of for loop

    System.out.println("\n\nSecond Array:");
    for(int a = 0; a < secArray.length; a++) {
      if(secArray[a] > 0) {
        System.out.print(secArray[a] + " ");
      }
    }//end of for loop

    int min = 0;
    int min2 = 0;
    boolean check3 = true;
    boolean check4 = true;

    if(check3) {
      for(int b = 0; b <firstArray.length; b++) {
        if(firstArray[b] >= min) {
          min = firstArray[b];
          if(firstArray[b+1] < min && firstArray[b+1] > 0) {
            System.out.println("\n\nERROR: Array not in correct order");
            check3 = false;
            check4 = true;
          }//end of nested if
        } //end of if/else
      }//end of for
      for(int c = 0; c < secArray.length; c++) {
        if(secArray[c] >= min2) {
         min2 = secArray[c];
         if(secArray[c+1] < min2 && secArray[c+1] > 0){
          System.out.println("\n\nERROR: Array not in correct order");
          check3 = false;
          check4 = true;
         }//end of nested if
        }//end of if/else
      }//end of for
    }//end of for loop

    System.out.print("\n\n");

    int[] fin = new int[20000];
    int xx = 0;

    for(int d = 0; d <10000; d++) {
      if(firstArray[d] > 0) {
       fin[d]+=firstArray[d];
      } else {
        fin[d] += secArray[xx];
        xx++;
      }//end of if/else
    }//end of for loop

    Arrays.sort(fin);
    System.out.println("Merged Array:");
    for (int i = 0; i < fin.length; i++) {
      if(fin[i] >0) {
      System.out.print(fin[i] + " ");
      }//if loop
    }//for loop

  }//end of program
}//end of program