Published by Zaheer

Reading properties file in Java is much easier than you might have thought. Following example illustrates one simple way of reading properties from a properties file.

Let’s say we need to read from myConfig.properties file.
The properties file has following entries.

Directory = C:/prodFiles/
NumberOfFiles = 25
Extension = java
Here is the class to read the values of these keys.

import java.util.Properties;
import java.io.*;
   public class ReadValues{
	private static final String PROP_FILE="myConfig.properties";
	public void readPropertiesFile(){
       try{
		InputStream is = ReadValues.class.getResourceAsStream(PROP_FILE);
		Properties prop = new Properties();
        prop.load(is);
		String directory = prop.getProperty("Directory");
        String numberOfFiles = prop.getProperty("NumberOfFiles");
		String  fileExtension = prop.getProperty("Extension");
        is.close();

	  /* code to use values read from the file*/
       }catch(Exception e){
         System.out.println("Failed to read from " + PROP_FILE + " file.");
       }
   }
  }

The code is quite simple and self explanatory. Let me know if you have any questions.

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Apr 08, 2008
Filed under: Java
Tags: Java

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