public class PairTest1
{
public static void main(String[] args)
{
String[] words = { "Mary", "had", "a", "little", "lamb" };
Pair<String> mm = ArrayAlg.minmax(words);
System.out.println("min = " + mm.getFirst());
System.out.println("max = " + mm.getSecond());
}
}class ArrayAlg
{
public static Pair<String> minmax(String[] a)
{
if (a == null || a.length == 0) return null;
String min = a[0];
String max = a[0];
for (int i = 1; i < a.length; i++)
{
if (min.compareTo(a[i]) > 0) min = a[i];
if (max.compareTo(a[i]) < 0) max = a[i];
}
return new Pair<String>(min, max);
}
}
public class Pair<T>
{
public Pair() { first = null; second = null; }
public Pair(T first, T second) { this.first = first; this.second = second; } public T getFirst() { return first; }
public T getSecond() { return second; } public void setFirst(T newValue) { first = newValue; }
public void setSecond(T newValue) { second = newValue; } private T first;
private T second;
}
min=Mary
max=little为什么不是
min=a
max=little不是利用compareTo比较吗?