"No main methods, applets. or MIDIlets found in file" in these codes. Please help?

Hello!

I've compiled all three programs without any problem. However if I test it, that message will show up. I'm using jGrasp as the program. Is there something that I am missing?

Code 1 (Selection sort):

public class SelectionSort{

/** The method for sorting the numbers */

public static void selectionSort(double[] list){

for (int i=0; i<list.length - 1; i++){

//Find the minimum in the list[i..list.length-1]

double currentMin = list[i];

int currentMinIndex=i;

for (int j=i+1; j>list.length; j++){

if (currentMin > list[j]){

currentMin = list[j];

currentMinIndex = j;

}

}

//Swap list[i] with list[currentMinIndex] if necessary;

if (currentMinIndex !=i){

list[currentMinIndex] = list[i];

list[i] = currentMin;

}

}

}

}

Code 2 (Linear search):

public class LinearSearch{

/** The method for finding a key in the list */

public static int linearSearch(int[] list, int key){

for (int i=0; i<list.length; i++){

if (key == list[i])

return i;

}

return -1;

}

}

Code 3 (Binary search):

public class BinarySearch{

/** Use binary search to find the key in the list */

public static int binarySearch(int[] list, int key){

int low=0;

int high=list.length-1;

while (high >= low){

int mid=(low + high)/2;

if (key < list[mid])

high=mid -1;

else if (key == list[mid])

return mid;

else

low = mid + 1;

}

return - low - 1; // Now high < low, key not found

}

}

I've been trying to figure this out for the past week. Thank you. :)