In order to get size of HashMap , we will use size() method. Below we will write code for how
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How to get all keys of HashMap
HashMap keyset() method is used to get all keys from hashmap java import java.util.HashMap; import java.util.Map; import java.util.Set; public class
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HashMap.get() Method is used to get value from key in hashmap. import java.util.HashMap; import java.util.Map; public class HashMapGetValueOfkey { public
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HashMap.containsValue() method is used to check whether a particular value exists or not in HashMap. Its method return true if
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HashMap.containsKey() method is used to check a key exits or not in hashmap. HashMap.containsKey() Method returns true if this map
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