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28 lines
715 B
28 lines
715 B
public class Pair {
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private Object key;
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private Object value;
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public Pair(Object key, Object value) {
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this.key = key;
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this.value = value;
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}
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//交换键值
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public Pair swap(){
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return new Pair(value,key);
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}
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public Object getKey(){
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return key;
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}
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public Object getValue(){
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return value;
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}
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@Override
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public String toString() {
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return "键："+key+" 值："+value;
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}
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public static void main(String[] args) {
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Pair p1 = new Pair("姓名","张三");
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System.out.println("交换前："+p1);
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Pair p2 = p1.swap();
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System.out.println("交换后："+p2);
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}
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}
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