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37 lines
898 B
37 lines
898 B
public class Pair<K, V> {
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private K key;
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private V value;
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public Pair(K key, V value) {
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this.key = key;
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this.value = value;
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}
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public K getKey() {
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return key;
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}
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public void setKey(K key) {
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this.key = key;
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}
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public V getValue() {
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return value;
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}
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public void setValue(V value) {
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this.value = value;
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}
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public Pair<V, K> swap() {
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return new Pair<>(this.value, this.key);
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}
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@Override
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public String toString() {
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return "(" + key + ", " + value + ")";
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}
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public static void main(String[] args) {
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Pair<String, Integer> original = new Pair<>("Age", 25);
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System.out.println("原始 Pair: " + original);
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// 调用 swap 方法
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Pair<Integer, String> swapped = original.swap();
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System.out.println("交换后 Pair: " + swapped);
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}
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}
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