I'm trying to iterate through a HashMap like this:
for (Map.Entry<String, Integer> entry : map.entrySet()) {
String key = entry.getKey();
Integer value = entry.getValue();
}
but I get this error:
entry cannot be resolved
Is this the wrong way to do it? From what I can tell, this seems to work for others.
You should use an Iterator
. Check out the docs
您需要导入java.util.Map
try this
for(Iterator<Map.Entry<String,Integer>> it = map.entrySet().iterator(); it.hasNext();)
{
Map.Entry<String,Integer> entry = it.next();
String key = entry.getKey();
Integer value = entry.getValue();
}
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