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13 lines
394 B
13 lines
394 B
package w7;
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public class Test {
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public static void main(String[] args) {
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// 原始 Pair
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Pair<String, Integer> original = new Pair<>("年龄", 18);
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System.out.println("交换前：" + original);
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// 调用静态 swap 方法交换键值
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Pair<Integer, String> swapped = Pair.swap(original);
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System.out.println("交换后：" + swapped);
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}
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}
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