java的HashMap遍历输出

package hashmap_1;import java.util.HashMap;import java.util.Iterator;import java.util.Map;public class Main {public static void main(String[] args) {// TODO Auto-generated method stub// HashMap<String,double> hashMap = new// HashMap<String,double>();///Syntax error on token "double",// Dimensions expected after this tokenHashMap<String, Double> hashMap = new HashMap<String, Double>();hashMap.put("aa", 90.0);hashMap.put("bb", 80.0);hashMap.put("cc", 70.0);Iterator iter = hashMap.entrySet().iterator();while (iter.hasNext()) {Map.Entry entry = (Map.Entry) iter.next();Object key = entry.getKey();Object value = entry.getValue();System.out.println(key + ":" + value);}}}

aa:90.0
bb:80.0
cc:70.0