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Java Dictionary example

In this tutorial we will discuss about dictionaries in Java. A Dictionary is an abstract class that maps keys to values. Every key is associated with a unique value and key are unique. Any non-null object can be used for either a key or a value. An attempt to insert either a null key or a null value to a ...

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Remove mapping from LinkedHashMap example

With this example we are going to demonstrate how to remove mapping from a LinkedHashMap, that is removing a key value pair from a LinkedHashMap. In short, to remove mapping from a LinkedHashMap you should: Create a new LinkedHashMap. Populate the linkedHashMap with elements, with put(K key, V value) API method of LinkedHashMap. Invoke remove(Object key) API method of LinkedHashMap. ...

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Remove all mappings from LinkedHashMap example

This is an example of how to remove all mappings from a LinkedHashMap, that means clearing the LinkedHashMap. Removing all mappings from a LinkedHashMap implies that you should: Create a new LinkedHashMap. Populate the linkedHashMap with elements, with put(K key, V value) API method of LinkedHashMap. Invoke clear() API method of LinkedHashMap. The method removes all of the mappings from ...

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LinkedHashMap Iterator example

In this example we shall show you how to obtain a LinkedHashMap Iterator, that is an iterator over the LinkedHashMap key value pairs. To obtain a LinkedHashMap Iterator one should perform the following steps: Create a new LinkedHashMap. Populate the linkedHashMap with elements, with put(K key, V value) API method of LinkedHashMap. Invoke entrySet() API method of LinkedHashMap. It returns ...

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Get size of LinkedHashMap example

With this example we are going to demonstrate how to get the size of a LinkedHashMap, that is the number of key-value mappings in this LinkedHashMap. In short, to get the size of a LinkedHashMap you should: Create a new LinkedHashMap. Populate the linkedHashMap with elements, with put(K key, V value) API method of LinkedHashMap. Invoke size() API method of ...

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Get Set view of LinkedHashMap keys example

In this example we shall show you how to get a Set view of the LinkedHashMap keys. To get a Set view of the LinkedHashMap keys one should perform the following steps: Create a new LinkedHashMap. Populate the linkedHashMap with elements, with put(K key, V value) API method of LinkedHashMap. Invoke keySet() API method of LinkedHashMap. The method returns a ...

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Check value existence in LinkedHashMap example

With this example we are going to check a value existence in a LinkedHashMap. In short, to check if a value exists in a LinkedHashMap you should: Create a new LinkedHashMap. Populate the linkedHashMap with elements, with put(K key, V value) API method of LinkedHashMap. Invoke containsValue(Object value) API method of LinkedHashMap. The method returns true if this map maps ...

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Check key existence in LinkedHashMap example

This is an example of how to check a key existence in a LinkedHashMap. Checking if a key exists in a LinkedHashMap implies that you should: Create a new LinkedHashMap. Populate the linkedHashMap with elements, with put(K key, V value) API method of LinkedHashMap. Invoke containsKey(Object key) API method of LinkedHashMap, with a specified key as parameter. The method returns ...

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