Properties Class
The Properties Class extends the Hashtable class and implements the Map interface. The Properties Class maintains the data in key/value format. Both key and value are String values. It is used to store properties permanently in a file. Its extension should be “.properties”.Example: Program to implement available methods in Properties class.
import java.util.*;
import java.io.*;
public class PropDemo
{
public static void main(String args[])
{
//create the properties objetc
Properties pro = new Properties();
String Id;
String name;
//adding the elements
pro.put("101", "ABC");
pro.put("104", "DEF");
pro.put("102", "XYZ");
System.out.println(pro);
System.out.println(pro.getProperty("101"));
System.out.println(pro.getProperty("102", "XYZ"));
System.out.println(pro.getProperty("106"));
}
}
Output:
{104=DEF, 102=XYZ, 101=ABC}
ABC
XYZ
null
