public class ItemMinimumDouble
1: //ItemMinimumDouble.java
3: public class ItemMinimumDouble
4: {
6: public static <TheType extends Number>
7: Double tripleAvg
8: (
9: TheType item1,
10: TheType item2,
11: TheType item3
12: )
13: {
14: Double tripleSum;
16: //tripleSum = item1 + item2 + item3; //Does not compile
17: tripleSum = item1.doubleValue() +
18: item1.doubleValue() +
19: item1.doubleValue();
21: return tripleSum / 3.0;
22: }
24: public static void main(String[] args)
25: {
26: Integer intVal1 = 55;
27: Integer intVal2 = 99;
28: Integer intVal3 = 66;
30: Double doubleVal1 = 14.5;
31: Double doubleVal2 = 12.3;
32: Double doubleVal3 = 1.75;
34: // Try tripleAvg method with Integers
35: System.out.println
36: (
37: "Items: " + intVal1 + " " + intVal2 + " " + intVal3
38: );
39: System.out.println
40: (
41: "Avg: " + tripleAvg(intVal1, intVal2, intVal3) + "\n"
42: );
44: // Try tripleAvg method with Doubles
45: System.out.println
46: (
47: "Items: " + doubleVal1 + " " + doubleVal2 + " " + doubleVal3
48: );
49: System.out.println
50: (
51: "Avg: " + tripleAvg(doubleVal1, doubleVal2, doubleVal3) + "\n"
52: );
53: }
54: }