/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Properties properties = new Properties();
		String key="7";
		String value=null;
 
		properties.setProperty("7", "Unlock");
 
		System.out.println(properties.getProperty("7"));   //print **Unlock**
        System.out.println(key);                           //print **7**
 
 
        System.out.println(value);                         //VALUE IS NULL HERE.
        value = properties.getProperty(key);               //NOW VALUE IS INITIALIZED
 
 
        System.out.println("Value after initialization: "+value);
	}
}

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