Java Hashtable values() Method

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Description

The Java Hashtable values() method is used to get a Collection view of the values contained in this Hashtable.

Declaration

Following is the declaration for java.util.Hashtable.values() method.

 public Collection<V> values() 

Parameters

NA

Return Value

The method call returns a collection view of the values contained in this table.

Exception

NA

Getting Collection View of Values of a HashTable of Integer, Integer Pair Example

The following example shows the usage of Java Hashtable values() method to get a Collection of values of a Hashtable. We've created a Hashtable object of Integer,Integer pairs. Then few entries are added, table is printed. Using values() method, collection is retrieved and printed.

 package com.tutorialspoint; import java.util.Hashtable; public class HashtableDemo { public static void main(String args[]) { // create hash table Hashtable<Integer,Integer> hashtable = new Hashtable<>(); // populate hash table hashtable.put(1, 1); hashtable.put(2, 2); hashtable.put(3, 3); System.out.println("Initial table elements: " + hashtable); System.out.println("Collection view: " + hashtable.values()); } } 

Output

Let us compile and run the above program, this will produce the following result.

 Initial table elements: {3=3, 2=2, 1=1} Collection view: [3, 2, 1] 

Getting Collection View of Values of a HashTable of Integer, String Pair Example

The following example shows the usage of Java Hashtable values() method to get a Collection of values of a Hashtable. We've created a Hashtable object of Integer,String pairs. Then few entries are added, table is printed. Using values() method, collection is retrieved and printed.

 package com.tutorialspoint; import java.util.Hashtable; public class HashtableDemo { public static void main(String args[]) { // create hash table Hashtable<Integer,String> hashtable = new Hashtable<>(); // populate hash table hashtable.put(1, "tutorials"); hashtable.put(2, "point"); hashtable.put(3, "is best"); System.out.println("Initial table elements: " + hashtable); System.out.println("Collection view: " + hashtable.values()); } } 

Output

Let us compile and run the above program, this will produce the following result.

 Initial table elements: {3=is best, 2=point, 1=tutorials} Collection view: [is best, point, tutorials] 

Getting Collection View of Values of a HashTable of Integer, Object Pair Example

The following example shows the usage of Java Hashtable values() method to get a Collection of values of a Hashtable. We've created a Hashtable object of Integer,Student pairs. Then few entries are added, table is printed. Using values() method, collection is retrieved and printed.

 package com.tutorialspoint; import java.util.Hashtable; public class HashtableDemo { public static void main(String args[]) { // create hash table Hashtable<Integer,Student> hashtable = new Hashtable<>(); // populate hash table hashtable.put(1, new Student(1, "Julie")); hashtable.put(2, new Student(2, "Robert")); hashtable.put(3, new Student(3, "Adam")); System.out.println("Initial table elements: " + hashtable); System.out.println("Collection view: " + hashtable.values()); } } class Student { int rollNo; String name; Student(int rollNo, String name){ this.rollNo = rollNo; this.name = name; } @Override public String toString() { return "[ " + this.rollNo + ", " + this.name + " ]"; } } 

Output

Let us compile and run the above program, this will produce the following result.

 Initial table elements: {3=[ 3, Adam ], 2=[ 2, Robert ], 1=[ 1, Julie ]} Collection view: [[ 3, Adam ], [ 2, Robert ], [ 1, Julie ]]