LinkedHashMap
HashMap的子类
与LinkedList相同,内部采用双向链表
元素的迭代顺序,与存入顺序一致
package bhz.aio;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
public class List {
public static void main(String[] args) {
Map map = new LinkedHashMap();
map.put("1", "111");
map.put("2", "222");
map.put("3", "333");
Set keySet = map.keySet();
Iterator it = keySet.iterator();
while (it.hasNext()) {
Object key = it.next();
Object value = map.get(key);
System.out.println(key+":"+value);
}
}
}
运行