//创建一个map对象并赋值Map<String, String> map = new HashMap<String, String>();for (int i = 0; i < 10; i++) {map.put("Key" + i, "Value" + i);}//使用keySet便利Set<String> keySet = map.keySet();for (String s : keySet) {System.out.println("key = " + s + "；value = " + map.get(s));}//使用entrySet便利Set<Map.Entry<String, String>> entrySet = map.entrySet();for (Map.Entry<String, String> entry : entrySet) {System.out.println("key = " + entry.getKey() + "；value = " + entry.getValue());}//使用iterator便利Iterator<Map.Entry<String, String>> iterator = map.entrySet().iterator();while (iterator.hasNext()) {Map.Entry<String, String> entry = iterator.next();System.out.println("key = " + entry.getKey() + "；value = " + entry.getValue());}//便利所有的valuefor (String value : map.values()) {System.out.println("value = " + value);}//遍历所有的keyfor (String s : keySet) {System.out.println("key = " + s);}