第一种方法是根据map的keyset（）方法来获取key的set集合，然后遍历map取得value的值
import java.util.HashMap;
import java.util.Iterator;
import java.util.Set;
public class HashMapTest2
{
public static void main(String[] args)
{
HashMap map = new HashMap();
map.put("a","aaaa");
map.put("b","bbbb");
map.put("c","cccc");
map.put("d","dddd");
Set set = map.keySet();
for(Iterator iter = set.iterator(); iter.hasNext();)
{
String key = (String)iter.next();
String value = (String)map.get(key);
System.out.println(key+"===="+value);
}
}
}
第二种方式是使用Map.Entry来获取：
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
public class HashMapTest4
{
public static void main(String[] args)
{
HashMap map = new HashMap();
map.put("a","aa");
map.put("b","bb");
map.put("c","cc");
map.put("d","dd");
Set set = map.entrySet();
for(Iterator iter = set.iterator(); iter.hasNext();)
{
Map.Entry entry = (Map.Entry)iter.next();
String key = (String)entry.getKey();
String value = (String)entry.getValue();
System.out.println(key +" :" + value);
}
}
}