Illegal start of the expression

package dupa;

public class Main {
    public static void main(String args[]) {
      void bubbleSort(int arr[])
    {
        for (int i = 0; i < arr.length; i++)
            for (int j = 0; j < n-i-1; j++)
                if (arr[j] > arr[j+1])
                {
                    int temp = arr[j];
                    arr[j] = arr[j+1];
                    arr[j+1] = temp;
                }
                else
    }
      
      
      int[] arr2 = {1,3,4,5,6,7,1};
      bubbleSort(arr2);
        System.out.println(arr2);
      
    }
}

Main.java:5: error: illegal start of expression
      void bubbleSort(int arr[])
      ^
Main.java:5: error: ';' expected
      void bubbleSort(int arr[])
                     ^
Main.java:5: error: ';' expected
      void bubbleSort(int arr[])
                               ^
Main.java:16: error: illegal start of statement
    }

int[] arr2 = {1,3,4,5,6,7,1};

int[] arr2 = new int[] {1,3,4,5,6,7,1};

package dupa;

public class Main {
     public void bubbleSort(int arr[])
    {
        for (int i = 0; i < arr.length; i++)
            for (int j = 0; j < arr.length - 1; j++)
                if (arr[j] > arr[j+1])
                {
                    int temp = arr[j];
                    arr[j] = arr[j+1];
                    arr[j+1] = temp;
               }
    }


    public static void main(String args[]) {

       int[] arr2 = {1,3,4,5,6,7,1};
       bubbleSort(arr2);
       System.out.println(arr2);
    }
}

bubbleSort(arr2);

new Main().bubbleSort(arr2);