Java IdentityHashMap containsKey() method7 Jan 2025 | 2 min read The containsKey(Object key) method of the Java IdentityHashMap class is used to check whether the calling IdentityHashMap contains the specified key. SyntaxParametersKey - The possible key which is to be checked in the IdentityHashMap. ReturnTrue, if the specified key is a key in the calling IdentityHashMap. Example 1Output: true false false true Example 2Output: false true true false Next TopicJava-identityhashmap-clone-method |
The isEmpty() method of the Java IdentityHashMap is used to check whether the calling IdentityHashMap is empty or not. Syntax public boolean isEmpty() Return True, if the calling IdentityHashMap is empty. Example 1 import java.util.IdentityHashMap; public class IdentityHashMapIsEmptyExample1 { public static void main(String[] args) { //Creating an...
2 min read
The put(K key, V value) method of the Java IdentityHashMap class is used to link the specified key with a specified value in the calling IdentityHashMap. Syntax public V put(K key, V value) Parameters Key - The key with which the specified value is to be linked. Value - The...
2 min read
The containsValue(Object value) method of the Java IdentityHashMap class is used to check whether the calling IdentityHashMap contains the specified value. Syntax public boolean containsValue(Object value) Parameters Value - The possible value which is to be checked in the calling IdentityHashMap. Return True, if the calling IdentityHashMap contains the specified value. Example...
3 min read
The clone() method of the Java IdentityHashMap class is used to get a shallow copy of the calling IdentityHashMap, excluding the key-value pairs. Syntax public Object clone() Return A shallow copy of the calling Map. Example 1 import java.util.IdentityHashMap; public class IdentityHashMapCloneExample1 { public static void main(String[] args) { ...
2 min read
The equal() method of the Java IdentityHashMap is used to check the equality of specified Object with the calling IdentityHashMap. Syntax public boolean equals(Object o) Parameters o - Object whose equality is to be compared with the calling IdentityHashMap. Return True, if the specified object is equal to the calling IdentityHashMap. Example...
3 min read
The clear() method of the Java IdentityHashMap class is used to remove all the key-value pairs from the calling IdentityHashMap. The IdentityHashMap will become empty after calling this method. Syntax public void clear() Example 1 import java.util.IdentityHashMap; import java.util.Iterator; import java.util.Map; import java.util.Set; public class IdentityHashMapClearExample1 { public static void...
3 min read
The get(Object key) method of the Java IdentityHashMap is used to get the value which is linked with the specified key, in the calling IdentityHashMap or null, if the key is not linked with any value. Syntax public V get(Object key) Parameters key - The key whose linked value...
3 min read
The putAll(Map<? extends K, ? extends V> m) method of the Java IdentityHashMap class is used to copy all the key-value pairs from the specified Map to the calling IdentityHashMap. Syntax public void putAll(Map<? extends K, ? extends V> m) Return m - Map from which key-value pairs are...
3 min read
The remove(Object key) method of the Java IdentityHashMap class is used remove the linkage of the specified key, from the calling IdentityHashMap, if present. Syntax public V remove(Object key) Parameters key - Key whose linkage is to be removed. Return The ious value linked with the specified key, or null if...
3 min read
The hashCode() method of the Java IdentityHashMap is used to get the hashCode value of the calling IdentityHashMap. Syntax public int hashCode() Return The hashCode value for the calling IdentityHashMap. Example 1 import java.util.IdentityHashMap; public class IdentityHashMapHashCodeExample1 { public static void main(String[] args) { //Creating an...
2 min read
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