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กระทู้คำถาม

ช่วยตรวจสอบให้ทีครับว่าทำไมมันถึงรันไม่ได้  แล้วแก้ให้กระผมด้วยนะครับ
ขอบคุณทุกความคิดเห็นครับ

[Spoil] คลิกเพื่อดูข้อความที่ซ่อนไว้public class Mergesort {
   public static int [] sort(int[] data, int[] data2) {

   int[] sortedData = new int[data1.length + data2.length];
   int i = 0;
   int i1 = 0;
   int i2 = 0;

    while (i1 < data1.length && i2 < data2.length) {
      if (data1[i1] <= data[i2]) {
        sortedData = data[i1];
        i1++;
     }
     else {
        sortedData = data2[i2];
        i2++;
     }
     i++;

     MergeSort.display(sortedData, 0, i -  1, data1, i1,
     data1,length - 1,data2, i2, data2,length - 1);
    }

    while (i1 < data1.length) {
       sortedData = data1[i1];
       i1++;
       i++;

       MergeSort.display(sortedData, 0, i, data1, i1,
       data1.length - 1, data2, i2, data2.length - 1);
    }

    while (i2 < data2.length) {
        sortedData = data2[i2];
        i2++;
        i++;

        MergeSort.display(sortedData, 0, i - 1, data1, i1,
        data1.length - 1, data, i2, data2.length - 1);
    }

    return sortedData;

}

public static viod display(int[] x1, int start1, int end1, int[] x2,
   int start2, int end2, int[] x3, int end3) {
   System.out.println(" Sorting Data:\t" + MergeSort.arrayToString(
   x1, start, end1) + "  " + MergeSort.arrayToString(x2, Start2,
       end2) + " " + MergeSort.arrayToString(x3, end3));

}

    public static String arrayToString(int[] x, int start, int end) {
        String output = "";
        for (int i = start; i <= end; i++)  {
          output += x + "  ";
       }
       return output;
    }

    public static viod main(String[] args) {
       int[] data1 = {1, 3, 5,7 ,9};
       int[] data2 = {2, 4, 6, 8};

       System.out.print("Input Data:\t");
       for (int i = 0; i < data1.length; i++) {
         System.out.print(data1 + " ");
       }
       System.out.println("");

        System.out.print("Input Data2:\t");
        for (int i = 0; i < data2.length; i++) {
          System.out.print(data2 + " ");
       }
       System.out.print("");

       int[] sortedData = MergeSort.sort(data1, data2);

       System.out.print("Sort Data:\t");
       for (int i = 0; i < sortedData.length; i++) {
       System.out.print(sortedData + " ");
       }
    }
}

แก้ไขข้อความเมื่อ