cn.hutool.core.lang.Pair Maven / Gradle / Ivy
package cn.hutool.core.lang;
import cn.hutool.core.clone.CloneSupport;
import java.io.Serializable;
import java.util.Objects;
/**
* 键值对对象，只能在构造时传入键值
*
* @param 键类型
* @param 值类型
* @author looly
* @since 4.1.5
*/
public class Pair extends CloneSupport> implements Serializable {
private static final long serialVersionUID = 1L;
protected K key;
protected V value;
/**
* 构建{@code Pair}对象
*
* @param 键类型
* @param 值类型
* @param key 键
* @param value 值
* @return {@code Pair}
* @since 5.4.3
*/
public static Pair of(K key, V value) {
return new Pair<>(key, value);
}
/**
* 构造
*
* @param key 键
* @param value 值
*/
public Pair(K key, V value) {
this.key = key;
this.value = value;
}
/**
* 获取键
*
* @return 键
*/
public K getKey() {
return this.key;
}
/**
* 获取值
*
* @return 值
*/
public V getValue() {
return this.value;
}
@Override
public String toString() {
return "Pair [key=" + key + ", value=" + value + "]";
}
@Override
public boolean equals(Object o) {
if (this == o)
return true;
if (o instanceof Pair) {
Pair pair = (Pair) o;
return Objects.equals(getKey(), pair.getKey()) &&
Objects.equals(getValue(), pair.getValue());
}
return false;
}
@Override
public int hashCode() {
//copy from 1.8 HashMap.Node
return Objects.hashCode(key) ^ Objects.hashCode(value);
}
}