## Map遍歷 >包含key和value的遍歷 ``` // 定義map HashMap<String, String> settings = new HashMap<String, String>(); for (Entry<String, String> setting : settings.entrySet()) { System.out.println("這里是key：" + setting.getKey() + "; 這里是value：" + setting.getValue() + "。"); } ``` >只需要key的情況 ``` // 定義map HashMap<String, String> settings = new HashMap<String, String>(); for (String key : settings.getKeys()) { System.out.println("這里是key：" + key + "。"); } ``` >只需要value的情況 ``` // 定義map HashMap<String, String> settings = new HashMap<String, String>(); for (String value : settings.getKeys()) { System.out.println("這里是value：" + value + "。"); } ```