Java Community | Help. Code. Learn.•3mo ago

Hey guys,

I am trying to solve a problem on Leetcode that asks to retrieve the number that occurs the most from an int array. I managed to put all numbers into a hashmap as keys, and values as their occurrence, but I can not figure it out how to retrieve values of n element from a map. (Just started learning Java, maybe I am completely off here :D). Is there a way to get the value of the n key of a map, or only for keys I know what their actual value is? Hope my question makes sense...

7 Replies

JavaBot•3mo ago

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dan1st•3mo ago

yourMap.get(yourKey)? in this case int occurance = yourMap.get(yourNumber);

orbankarolyOP•3mo ago

tried with the .get() method, but if i understand it correctly it works only if i know the key itself i just wanted to iterate through the map and check the values as integers, so i can set the highest to a max variable my workaround was putting the original array's number in a stack, and then going through the stack to get the values out but the code is a mess as much as my posts 😄

dan1st•3mo ago

oh I didn't notice you wanted to iterate over it you can do something like this if you don't need to return anything from it and also not change local variables:

yourMap.forEach((key, value) -> {
  //do something here
});

yourMap.forEach((key, value) -> {
  //do something here
});

otherwise you can use a foreach loop:

for(Map.Entry<Integer, Integer> entry : yourMap.entrySet()){
  int key = entry.getKey();
  int value = entry.getValue();
}

for(Map.Entry<Integer, Integer> entry : yourMap.entrySet()){
  int key = entry.getKey();
  int value = entry.getValue();
}

orbankarolyOP•3mo ago

ohh cool, thanks a lot!

JavaBot•3mo ago

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JavaBot•3mo ago

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