Java-基本集合

Map

Map<String, Object> map = ...;

for (String key : map.keySet()) {
// if get key
}

for (Object value : map.values()) {
    // if get value
}

for (Map.Entry<String, Object> entry : map.entrySet()) {
    String key = entry.getKey();
    Object value = entry.getValue();
    // if you want get key and value
}

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