You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
48 lines
1.1 KiB
48 lines
1.1 KiB
public class Pair<K, V> {
|
|
private K key;
|
|
private V value;
|
|
|
|
// 构造方法
|
|
public Pair(K key, V value) {
|
|
this.key = key;
|
|
this.value = value;
|
|
}
|
|
|
|
// 交换 key 和 value 的方法（注意：交换后类型会变为 Pair<V, K>）
|
|
public Pair<V, K> swap() {
|
|
return new Pair<>(this.value, this.key);
|
|
}
|
|
|
|
// Getter 和 Setter
|
|
public K getKey() {
|
|
return key;
|
|
}
|
|
|
|
public void setKey(K key) {
|
|
this.key = key;
|
|
}
|
|
|
|
public V getValue() {
|
|
return value;
|
|
}
|
|
|
|
public void setValue(V value) {
|
|
this.value = value;
|
|
}
|
|
|
|
@Override
|
|
public String toString() {
|
|
return "Pair{" +
|
|
"key=" + key +
|
|
", value=" + value +
|
|
'}';
|
|
}
|
|
|
|
// 测试
|
|
public static void main(String[] args) {
|
|
Pair<String, Integer> pair = new Pair<>("age", 20);
|
|
System.out.println("原Pair: " + pair);
|
|
Pair<Integer, String> swappedPair = pair.swap();
|
|
System.out.println("交换后: " + swappedPair);
|
|
}
|
|
}
|