BE THE CODER > Java > Load properties, Save properties and Iterate properties

Default properties provide a clean way to specify alternative or default properties when a certain properties are missing. This is expected behavior in all enterprise applications. The following example shows instantiating and accessing default Properties,

File Name :	com/bethecoder/tutorials/utils/props/DefaultProps.java
Author :	Sudhakar KV
Email :	[email protected]


package com.bethecoder.tutorials.utils.props;



import java.util.Properties;



public class DefaultProps {

  /**

   * @param args

   */

  public static void main(String[] args) {



    //Instantiate default properties

    Properties defaultProp = new Properties();

    defaultProp.setProperty("ONE", "111111");

    defaultProp.setProperty("TWO", "222222");

    

    //If some property is missing in 'prop'

    //and available in 'defaultProp' then

    //it gets from 'defaultProp' 

    Properties prop = new Properties(defaultProp);

    prop.setProperty("TWO", "333333");

  

    // 111111 (value from default properties)

    System.out.println(prop.getProperty("ONE"));

    

    // 333333 (value from properties)

    System.out.println(prop.getProperty("TWO"));  

    

    // null   (value not found in properties & default properties)

    System.out.println(prop.getProperty("FIVE"));    

    

    //Another alternative to specify default value

    //when certain property is missing

    System.out.println(prop.getProperty("FIVE", "555555"));  //555555

  }

}

Default Properties