/*
* Output:
*
a 1
A 2
c: 3
z: default
*
*/
import java.util.Properties;
public class MainClass {
public static void main(String args[]) {
Properties prop = new Properties();
prop.put("a", "1");
prop.put("b", "2");
prop.put("c", "3");
Properties book = new Properties(prop);
book.put("A", "4");
book.put("B", "5");
System.out.println("a " + book.getProperty("a"));
System.out.println("A " + book.getProperty("b"));
System.out.println("c: " + book.getProperty("c"));
System.out.println("z: " + book.getProperty("z", "default"));
}
}