Java-IO-Properties

PropertiesDemo.java

package com.javademo;

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

public class PropertiesDemo {

	public static void main(String[] args) {
		//Read properties file
		Properties p = loadPropertiesFile("props.properties");
		
		//Print out properties
		System.out.println("Username: " + p.getProperty("prop.user"));
		System.out.println("Password: " +p.getProperty("prop.pass"));
	}

	public static Properties loadPropertiesFile(String s) {
		Properties properties = new Properties();
		FileReader input = null;
		try {
			input = new FileReader(s);			
			try {
				properties.load(input);
			} catch (IOException e) {
				System.err.println("Failed loading properties: could not read file");
			}
		} catch (FileNotFoundException e) {
			System.err.println("Failed loading properties: file not found");
		} finally{
			if(input!=null){
				try {
					input.close();
				} catch (IOException e) {
					System.err.println("Failed close properties file");
				}
			}			
		}
		return properties;
	}

}

props.properties

#Simple Properties File 
prop.user=username
prop.pass=password