How to Iterate Map

Posted 2020-06-09

常用iterate 方法

 1 Map<Integer, String> m = new HashMap<Integer, String>();
 2 for(Map.Entry<Integer, String> entry : m.entrySet()){
 3     System.out.println("Key: " + entry.getKey() + ", Value: " + entry.getValue());
 4 }
 5 
 6 
 7 Iterator<Map.Entry<Integer, String>> iterator = m.entrySet().iterator();
 8 while(iterator.hasNext()){
 9     Map.Entry entry = iterator.next();
10     System.out.println("Key: " + entry.getKey() + ", Value: " + entry.getValue());
11 }