JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Program: How to load Properties file from a file system?


Description:

This example shows how to load properties file from a local file system. Here we are using FileInputStream to load the properties file. Here you have to pass the physical location of the file in the file system.


Code:
package com.java2novice.properties;

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

public class MyPropertyLoad {

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

sample.properties
db.host=appdomain.java2novice.com
db.user=java2novice
db.password=mypassword
db.service=orcl

Output:
db.host: appdomain.java2novice.com
db.user: java2novice
db.password: mypassword
 Next 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?
Knowledge Centre
What is servlet context?
The servlet context is an interface which helps to communicate with other servlets. It contains information about the Web application and container. It is kind of application environment. Using the context, a servlet can obtain URL references to resources, and store attributes that other servlets in the context can use.
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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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