Java Hashtable - get() Method
The java.util.Hashtable.get() method returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.
Syntax
public V get(Object key)
Here, V is the type of value maintained by the container.
Parameters
key |
Specify the key whose associated value is to be returned. |
Return Value
Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.
Exception
Throws NullPointerException, if the specified key is null
Example:
In the example below, the java.util.Hashtable.get() method returns the value to which the specified key is mapped in the given hashtable.
import java.util.*;
public class MyClass {
public static void main(String[] args) {
//creating a hashtable
Hashtable<Integer, String> Htable = new Hashtable<Integer, String>();
//populating hashtable
Htable.put(101, "John");
Htable.put(102, "Marry");
Htable.put(103, "Kim");
Htable.put(104, "Jo");
//printing mapped value of specified key
System.out.println("101 is mapped to: " + Htable.get(101));
System.out.println("102 is mapped to: " + Htable.get(102));
System.out.println("103 is mapped to: " + Htable.get(103));
System.out.println("104 is mapped to: " + Htable.get(104));
}
}
The output of the above code will be:
101 is mapped to: John 102 is mapped to: Marry 103 is mapped to: Kim 104 is mapped to: Jo
❮ Java.util - Hashtable
