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Hutool是一个小而全的Java工具类库,通过静态方法封装,降低相关API的学习成本,提高工作效率,使Java拥有函数式语言般的优雅,让Java语言也可以“甜甜的”。

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package cn.hutool.core.map;

import java.util.Map;

/**
 * 自定义键的Map,默认HashMap实现
 *
 * @param  键类型
 * @param  值类型
 * @author Looly
 * @since 4.0.7
 */
public abstract class CustomKeyMap extends TransMap {
	private static final long serialVersionUID = 4043263744224569870L;

	/**
	 * 构造
* 通过传入一个Map从而确定Map的类型,子类需创建一个空的Map,而非传入一个已有Map,否则值可能会被修改 * * @param emptyMap Map 被包装的Map,必须为空Map,否则自定义key会无效 * @since 3.1.2 */ public CustomKeyMap(Map emptyMap) { super(emptyMap); } @Override protected V customValue(Object value) { //noinspection unchecked return (V)value; } }




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