Java program for Associate keys with values

By: Saravanan Emailed: 1757 times Printed: 2448 times    

Latest comments
By: rohit kumar - how this program is work
By: Kirti - Hi..thx for the hadoop in
By: Spijker - I have altered the code a
By: ali mohammed - why we use the java in ne
By: ali mohammed - why we use the java in ne
By: mizhelle - when I exported the data
By: raul - no output as well, i'm ge
By: Rajesh - thanx very much...
By: Suindu De - Suppose we are executing

In this tutorial we are going to see how to associate keys with values. Here we are going to see how to create own methods for mapping the keys with values and how to get the value using Key.

public class AssociateExample 
{

private Object[][] o;

private int in;

public AssociateExample(int length) 
{
o = new Object[length][2];
}

public void put(Object key, Object value) 
{
if (in >= o.length)
throw new ArrayIndexOutOfBoundsException();
o[in++] = new Object[] { key, value };
}

public Object get(Object key) 
{
for (int i = 0; i < in; i++)
if (key.equals(o[i][0]))
return o[i][1];
throw new RuntimeException("Failed to find key");
}

public String toString() 
{
String result = "";
for (int i = 0; i < in; i++) 
{
result += o[i][0] + " : " + o[i][1];
if (i < in - 1)
result += "\n";
}
return result;
}

public static void main(String[] args) 
{
AssociateExample connect = new AssociateExample(6);
connect.put("education", "business");
connect.put("globe", "warm");
connect.put("people", "refugees");
connect.put("politician", "god");
connect.put("god", "gone");
connect.put("water", "gold");
try 
{
connect.put("extra", "object"); 

catch (ArrayIndexOutOfBoundsException e) 
{
System.out.println("Can't put new objects!..");
}
System.out.println(connect);
System.out.println(connect.get("god"));

}
}

Output:

Can't put new objects!..
education : business
globe : warm
people : refugees
politician : god
god : gone
water : gold
gone


Java Home | All Java Tutorials | Latest Java Tutorials

Sponsored Links

If this tutorial doesn't answer your question, or you have a specific question, just ask an expert here. Post your question to get a direct answer.



Bookmark and Share

Comments(0)


Be the first one to add a comment

Your name (required):


Your email(required, will not be shown to the public):


Your sites URL (optional):


Your comments:



More Tutorials by Saravanan
Converting properties using PropertyEditors and Other Spring features worth mentioning
How to create an array and method in JSP
inheritance in Java
Use List, Set, SortedSet, LinkedHashSet, Map, LinkedHashMap in java
cloneable in Java
Java program for Associate keys with values
Java code for Enumeration and using java.lang.reflect.Array
Insert an element in Array, Search and Sort Array by using java program
Type Casting in Java
How to initialize an Array and how to copy the array
Simple java program to add an element to specified index of Java ArrayList
How to use set, get basic and nested properties for Spring framework
How to access instance from an inner class and accessing outer class variables in java
How to use and access the inner class in java
Java program for Map

More Tutorials in Java
Update contents of a file within a jar file
Tomcat and httpd configured in port 8080 and 80
Java File
Java String
Count number of vowels, consonants and digits in a String in Java
Reverse a number in Java
Student marks calculation program in Java
Handling Fractions in Java
Calculate gross salary in Java
Calculate average sale of the week in Java
Vector in Java - Sample Program
MultiLevel Inheritance sample in Java
Multiple Inheritance sample in Java
Java program using Method Overriding
Java program to check if user input is an even number

More Latest News
Most Viewed Articles (in Java )
How to Send SMS using Java Program (full code sample included)
Method Overriding in Java
Using StringTokenizer in Java
Student marks calculation program in Java
The Basic Structure of a Simple Java program
XML and Java - Parsing XML using Java Tutorial
Stack example in Java - push(), pop(), empty(), search()
Count number of vowels, consonants and digits in a String in Java
wait(), notify() and notifyAll() in Java - A tutorial
Method Overloading (function overloading) in Java
FileReader and FileWriter example program in Java
Vector example in Java
Read from a COM port using Java program
InetAddress Example program in Java
Integer: byte, short, int, and long data types in Java
Most Emailed Articles (in Java)
3-D Secure Payment or 3DS - (3-Domain Secure Payment)
Simplified Systems Integration
Java File
Java String
Count number of vowels, consonants and digits in a String in Java
Student marks calculation program in Java
Calculate gross salary in Java
Insert, Delete, Search, Print an int Array in Java
HTTPS Java - URL Connection program. Using HttpsURLConnection
Get user input in Java
Text to Speech conversion program in Java
Cannot run program "C:\Program Files\Java\jre6\bin\javac.exe": CreateProcess error=2, The system cannot find the file specified
Using the AWS SDK for Java
Java code for Enumeration and using java.lang.reflect.Array
Simple java program to add an element to specified index of Java ArrayList