map遍历的几种方式分别是什么
Iterator it=map.entrySet().iterator();
System.out.println( map.entrySet().size());
String key;
String value;
while(it.hasNext()){
Map.Entry entry = (Map.Entry)it.next();
key=entry.getKey().toString();
value=entry.getValue().toString();
System.out.println(key+"===="+value);
} for (Map.Entry
System.out.println("key= " + entry.getKey() + " and value= " + entry.getValue());
}登录后复制
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