package 泛型类;
public class Pair<T> {
private T first;
private T second;
public Pair() {
first = null;
second = null;
}
public Pair(T first, T second) {
this.first = first;
this.second = second;
}
public T getFirst() {
return first;
}
public void setFirst(T first) {
this.first = first;
}
public T getSecond() {
return second;
}
public void setSecond(T second) {
this.second = second;
}
}
package 泛型类;
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(mm.getFirst());
System.out.println(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 = 0; 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<>(min, max);
}
}