import java.util.ArrayList;
import
java.util.HashMap;
import java.util.Iterator;
import
java.util.List;
import java.util.Map;
public class ConvertMapToList {
public
static void main(String[] args) {
Map map = new HashMap();
map.put("a", "a1");
map.put("b",
"b1");
map.put("c",
"c1");
List
listKey = new ArrayList();
List
listValue = new ArrayList();
Iterator it =
map.keySet().iterator();
while
(it.hasNext()) {
System.out.println(map);
String key =
it.next().toString();
listKey.add(key);
listValue.add(map.get(key));
}
System.out.println("Convert
Finished !");
//output the context of the
ArrayList
for(int i =0
;iSystem.out.println(listKey);
System.out.print("Key
:"+listKey.get(i));
System.out.println("Value
:"+listValue.get(i));
}
}
}
看API有个视图的词。这个视图就可以看成是转换;map里有两种转成set的视图。set转成iterator就容易了。最后一种是转成Collection的。就是arraylist;