Properties class

Properties class:

Properties is the sub-class of Hashtable class. Properties class object is used for reading of maintaining system environmental variables and reading the data from resource data file or properties file.

Properties API:

Constructor:

Properties ();

Instance Methods:

public void setProperty (Object kobj, Object vobj); 
public Object getProperty (Object kobj);
public void load (InputStream);

Write a java program which illustrates the concept of Properties class?

Answer:

import java.util.*;
import java.io.*;

class properties {

    public static void main(String[] args) {
        try {
            Properties p = new Properties();
            FileInputStream fis = new FileInputStream("x.prop");
            p.load(fis);
            Object vobj1 = p.get("dno");
            Object vobj2 = p.get("dname");
            Object vobj3 = p.get("pwd");
            System.out.println("USER NAME :" + vobj2);
            System.out.println("DEPT NUMBER : " + vobj1);
            System.out.println("PASSWORD : " + vobj3);
        } catch (Exception e) {
            System.out.println(e);
        }
    }
};