Map

Map转换为List

// key listList keyList = new ArrayList(map.keySet());// value listList valueList = new ArrayList(map.valueSet());// key-value listList entryList = new ArrayList(map.entrySet());

Map遍历

for(Entry entry: map.entrySet()) {  // get key  K key = entry.getKey();  // get value  V value = entry.getValue();} 

通过key对map排序