Why my array class is unable find out the minimum and maximum value of a randomly generated array?

I have created an array with random numbers which will also show maximum and minimum element of the array,the program is successfully compiled.But on run the maximum value:0 minimum value:0 while the generated array is correct.Please help me out to rectify the wrong logic.

     class ArrayTest
     {
     public static void main(String s[])
     {
     int a[];
     a=new int[10];
     System.out.println("Storing the random values in Array Elements");
     System.out.println("Maximum:"+getMax(a));
     System.out.println("Minimum:"+getMin(a));
     for(int i=0;i<a.length;i++)
     {
     a[i]=(int)(Math.random()*100);
     }
     System.out.println("\n List of Elements:");
     int sum=0;
     for(int i=0;i<a.length;i++)
     {
     System.out.println(a[i]);
     }
     }


     //Maximum Value Finding
     public static int getMax(int[] a)
     {
     int max=a[0];
     for(int i=0;i<a.length;i++)
     {
     if(a[i]>max)
     {
     max=a[i];
     }
     }
     return max;
     }
     //Minimum Values Finding
     public static int getMin(int[] a)
     {
     int min=a[0];
     for(int i=0;i<a.length;i++)
     {
     if(a[i]<min)
     {
     min=a[i];
     }
     }
     return min;
     }
     }