Java properties all keys

Get All Keys and Values of the Properties files in Java

In this section, you will learn how to get all keys and it’s values of the properties files in Java.

Get All Keys and Values of the Properties files in Java

In this section, you will learn how to get all keys and it’s values of the properties files in Java.

Get All Keys and Values of the Properties files in Java

In this section, you will learn how to get all keys and it’s values of the properties files in Java. Java provides the features to collection of all keys and values of the properties file. The properties files that can be used to large collections of information to be inserting in the properties files.

Here, you will get the all keys and values of the properties files with the help of this program. The program shows the keys and it’s values when you run it. The following methods had been used by the program.

pro.keySet():
This method returns a set of keys, which contained in the object of the Properties method. The Properties files has the many keys then this method provides all keys.

pro.keys():
This method provides the all keys of the properties files. Which stored in the Enumeration objects.

Enumeraton:
This is the interface which provided by the java.util package. It’s object implements the series of elements and calls the nextElements method, which provides the series of elements. The keys and values of the Properties files which is enumerated by this interface and calls the hashtable which defines the keys and values of the properties files.

hasMoreElements():
This method checks the Enumeration object has more elements or not and returns the true or false. It returns true, if the Enumeration object has more than one elements Otherwise, it return false.

nextElement():
This is the method to returns the next elements of the Enumeration, if the enumeration provides the more than one elements.

Here is the video tutorial of: «How to get key and value from properties file in Java?»

Here is the code of program:

import java.io.*; import java.util.*; public class GetAllProperties < public static void main ( String [] args ) < Properties pro = new Properties () ; try < BufferedReader br = new BufferedReader ( new InputStreamReader ( System.in )) ; System.out.print ( «Enter file name for getting all properties : » ) ; FileInputStream in = new FileInputStream ( br.readLine () + «.properties» ) ; pro.load ( in ) ; System.out.println ( «All keys of the property file : » ) ; System.out.println ( pro.keySet ()) ; System.out.println ( «All values of the property file : » ) ; Enumeration em = pro.keys () ; while ( em.hasMoreElements ()) < String str = ( String ) em.nextElement () ; System.out.println (str + «: » + pro.get ( str )) ; > > catch ( IOException e ) < System.out.println ( e.getMessage ()) ; > > >

Tutorials

1. Java util package Examples
2. Java Util Package — Utility Package of Java
3. Generating Random Number
4. Breaking the String into Words
5. Listing all available Locales
6. Setting the default Locale
7. Associate a value with an object
8. Comparing Arrays
9. Shuffling the Element of a List or Array
10. Collections Framework
11. Collection Iterate Example
12. Converting Collection to an Array
13. Converting an Array to a Collection
14. Implement the Queue in Java
15. Implementing a Stack in Java
16. Implementing a Least-Recently-Used(LRU) Cache
17. Creating a Copy of a Collection
18. Making a Collection Read-Only
19. Sorting elements of a Collection
20. Creating a Hash Table
21. Finding an Element in a Sorted Array
22. Read the Key-Value of Property File in Java
23. Get All Keys and Values of the Properties files in Java
24. Write the Keys and Values of the Properties files in Java
25. Scheduling a Timer Task
26. Getting the Current Time
27. Getting Information of All Available Time Zones
28. Getting the current date
29. Determining the Number of Days in a Month
30. Comparing Dates in Java
31. Determining the actual age from date of birth in Java
32. Determining If a Year is a Leap Year in Java
33. Determining the Day-of-Week for a Particular Date
34. What is a JAR file in Java
35. Creating a JAR file in Java
36. Viewing contents of a JAR File
37. Listing the Main Attributes in a JAR File Manifest
38. Creating a ZIP file in Java
39. Listing Contents of a ZIP File
40. Unzip a ZIP File

Источник