JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Program: How to load property file using class name in java?


Description:

This example shows how to load a property file using class name in java.


Code:
package com.java2novice.properties;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

public class MyPropUsingClassName {

	private static Properties prop;
	
	static{
		InputStream is = null;
		try {
			prop = new Properties();
			is = MyPropUsingClassName.class.getResourceAsStream("/sample.properties");
			prop.load(is);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	public static String getPropertyValue(String key){
		return prop.getProperty(key);
	}
	
	public static void main(String a[]){
		
		System.out.println("db.host: "+getPropertyValue("db.host"));
		System.out.println("db.user: "+getPropertyValue("db.user"));
		System.out.println("db.password: "+getPropertyValue("db.password"));
	}
}

Output:
db.host: appdomain.java2novice.com
db.user: java2novice
db.password: mypassword
<< Previous Program 

List of Properties class sample programs:

  1. How to load Properties file from a file system?
  2. How to load Properties file from the classpath?
  3. How to load Properties file from a static block or static method?
  4. How to assign default values for unavailable keys in properties file?
  5. How to get all keys from properties file?
  6. How to create and store property file dynamically?
  7. How to store property file as xml file?
  8. How to load property file using class name in java?
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Knowledge Centre
Difference between Enumeration and Iterator
The functionality of Enumeration and the Iterator are same. You can get remove() from Iterator to remove an element, while while Enumeration does not have remove() method. Using Enumeration you can only traverse and fetch the objects, where as using Iterator we can also add and remove the objects. So Iterator can be useful if you want to manipulate the list and Enumeration is for read-only access.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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