Java Dictionary get() Method

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Description

The Java Dictionary get(Object key) method returns the value that is on the key given in the dictionary.

Declaration

Following is the declaration for java.util.Dictionary.get() method

public abstract V get(Object key)

Parameters

key − a key in this dictionary. Can be null if key is not mapped to any value.

Return Value

This method returns the value to which the key is mapped in this dictionary.

Exception

NA

Getting a Value from a Dictionary of Integer,Integer Pair Example

The following example shows the usage of Java Dictionary get(int) method. We're creating a dictionary instance using Hashtable object of Integer, Integer pairs. Then we've added few elements to it. One of the element is retrived using get(int) method by passing a key and then printed.

package com.tutorialspoint;

import java.util.Dictionary;
import java.util.Hashtable;

public class DictionaryDemo {
   public static void main(String[] args) {

      // create a new hashtable
      Dictionary<Integer, Integer> dictionary = new Hashtable<>();

      // add 2 elements
      dictionary.put(1, 1);
      dictionary.put(2, 2);

      System.out.println(dictionary.get(1));
   }
}

Output

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

1

Getting a Value from a Dictionary of Integer,String Pair Example

The following example shows the usage of Java Dictionary get(int) method. We're creating a dictionary instance using Hashtable object of Integer, String pairs. Then we've added few elements to it. One of the element is retrived using get(int) method by passing a key and then printed.

package com.tutorialspoint;

import java.util.Dictionary;
import java.util.Hashtable;

public class DictionaryDemo {
   public static void main(String[] args) {

      // create a new hashtable
      Dictionary<Integer, String> dictionary = new Hashtable<>();

      // add 2 elements
      dictionary.put(1, "One");
      dictionary.put(2, "Two");
      System.out.println(dictionary.get(1));
   }
}

Output

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

One

Getting a Value from a Dictionary of Integer, Object Pair Example

The following example shows the usage of Java Dictionary get(int) method. We're creating a dictionary instance using Hashtable object of Integer, Student pairs. Then we've added few elements to it. One of the element is retrived using get(int) method by passing a key and then printed.

package com.tutorialspoint;

import java.util.Dictionary;
import java.util.Hashtable;

public class DictionaryDemo {
   public static void main(String[] args) {

      // create a new hashtable
      Dictionary<Integer, Student> dictionary = new Hashtable<>();

      // add 2 elements
      dictionary.put(1, new Student(1, "Julie"));
      dictionary.put(2, new Student(2, "Robert"));

      System.out.println(dictionary.get(1));
   }
}
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 −

[ 1, Julie ]