将指定的键值对集合放入到指定Map对象中

package mm.tt;

import java.util.*;

publicclass TestMap {

/**

* 将指定的键值对集合放到HashMap中

*

* @param keys

* 键数组

* @param values

* 值数组

* @return

*/

publicstatic Map asHashMap(K[] keys, V[] values) { if (keys == null || values == null) {

thrownew RuntimeException("键数组和值数组不能为空");

}

Map map = new HashMap();

for (int i = 0, c = keys.length; i < c; i++) {

map.put(keys[i], values[i]);

}

return map;

}

/**

* 将指定的键值对集合放入到指定Map对象中

*

* @param keys

* 键数组

* @param values

* 值数组

* @return

*/

publicstatic> Map asMap(K[] keys, V[] values, M map) {

if (keys == null || values == null) {

thrownew RuntimeException("键数组和值数组不能为空");

}

if (map == null) {

thrownew RuntimeException("指定的Map对象不能为空");

}

for (int i = 0, c = keys.length; i < c; i++) {

map.put(keys[i], values[i]);

}

return map;

}

publicstaticvoid main(String[] args) {

ArrayList> countryList = new

ArrayList>();

countryList.add(TestMap.asMap(new String[] { "key", "name" }, new String[] { "8", "英国"}, new HashMap()));

countryList.add(TestMap.asHashMap(new String[] { "key", "name" }, new String[] { "3", "美国" }));

System.out.println(countryList.size());

}

}