Assignemnt #93 and Distance Formula

Code

    
    ///name: nick cerdan
    ///period: 6
    ///program name: distance formula
    ///file name: DistanceFormula
    ///date finished: 11/4/15
    
    public class DistanceFormula
    {
    	public static void main( String[] args )
    	{
    		// test the formula a bit
    		double d1 = distance(-2,1 , 1,5);
    		System.out.println(" (-2,1) to (1,5) => " + d1 );
     
    		double d2 = distance(-2,-3 , -4,4);
    		System.out.println(" (-2,-3) to (-4,4) => " + d2 );
     
    		System.out.println(" (2,-3) to (-1,-2) => " + distance(2,-3,-1,-2) );
     
    		System.out.println(" (4,5) to (4,5) => " + distance(4,5,4,5) );
    	}
     
    	public static double distance( int x1, int y1, int x2, int y2 )
    	{
    		double D;
            
            D = Math.sqrt((x2-x1)*(x2-x1) + (y2-y1)*(y2-y1));
            
            return D;
    	}
    }