How to create and store property file dynamically in Java?

Java 8 Object Oriented Programming Programming

The .propertiesis an extension in java which is used to store configurable application. It is represented by the Properties class in Java, you can store a properties file and read from it using the methods of this class. This class inherits the HashTable class.

Creating a .properties file

To create a properties file −

Instantiate the Properties class.
Populate the created Properties object using the put() method.
Instantiate the FileOutputStream class by passing the path to store the file, as a parameter.

Example

The Following Java program creates a properties file in the path D:/ExampleDirectory/

import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Properties;
public class CreatingPropertiesFile {
   public static void main(String args[]) throws IOException {
      //Instantiating the properties file
      Properties props = new Properties();
      //Populating the properties file
      props.put("Device_name", "OnePlus7");
      props.put("Android_version", "9");
      props.put("Model", "GM1901");
      props.put("CPU", "Snapdragon855");
      //Instantiating the FileInputStream for output file
      String path = "D:\\ExampleDirectory\\myFile.properties";
      FileOutputStream outputStrem = new FileOutputStream(path);
      //Storing the properties file
      props.store(outputStrem, "This is a sample properties file");
      System.out.println("Properties file created......");
   }
}

Output

Properties file created......

If you observe the output file you can see the created contents as −

Storing properties file in XML format

You can store the properties file in XMLformat using the storeToXML() method.

Example

import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Properties;
public class CreatingPropertiesFile {
   public static void main(String args[]) throws IOException {
      //Instantiating the properties file
      Properties props = new Properties();
      //Populating the properties file
      props.put("Device_name", "OnePlus7");
      props.put("Android_version", "9");
      props.put("Model", "GM1901");
      props.put("CPU", "Snapdragon855");
      //Instantiating the FileInputStream for output file
      String outputPath = "D:\\ExampleDirectory\\myFile.xml";
      FileOutputStream outputStrem = new FileOutputStream(outputPath);
      //Storing the properties file in XML format
      props.storeToXML(outputStrem, "This is a sample properties file");
      System.out.println("Properties file created......");
   }
}

Output

Properties file created......

If you observe the output file you can see the created contents as −

Krishna Kasyap

Published on 02-Aug-2019 11:18:19

Previous Page Print Page