Arifmetic.java

package masiv;

public class Arifmetic {

	public static void main(String[] args) {
		
		int [] data={1,10,5,7,6};
		int [] data1={0};
		int [] data2={};
		int [] data3={0,0,15,25,16};
		int [] data4={-3,25,2};
		
		System.out.println(avaradge(data ));
		System.out.println(avaradge(data1));
		System.out.println(avaradge(data2));
		System.out.println(avaradge(data3));
		System.out.println(avaradge(data4));
	}
	
	static double avaradge(int[]data)
	{
		if(data==null || data.length==0)
		   return -1;
		
		double sum=0;

		for(int i:data)
	        	sum+=i;
		
		return sum/data.length;
	}

}