import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Properties;


public class PropertiesExample {
	public static void main(String[] args) {
		Properties props = new Properties();
		props.setProperty("prop1", "value1");
		props.setProperty("prop2", "value2");
		props.setProperty("prop3", "value3");
		try {
			props.store(new FileOutputStream("props.txt"), "These are some pedagogical properties");
		} catch (IOException e) {
			System.out.println("Error saving properties.");
			e.printStackTrace();
		}
		
		props = new Properties();
		try {
			props.load(new FileInputStream("props.txt"));
		} catch (IOException e) {
			System.out.println("Error loading properties.");
			e.printStackTrace();
		}
		
	}
}