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33 lines
799 B
33 lines
799 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 V getValue(){
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return value;
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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 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<>(value,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> pair=new Pair<>("小红",18);
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System.out.println("交换前:"+pair);
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Pair<Integer,String> swapped=pair.swap();
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System.out.println("交换后:"+swapped);
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}
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}
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