// add a slash \ to continue the value on the next line.
prop1=line1\
line2\
line3
import java.net.URL;
import java.util.Properties;
public class Main {
public static void main(String args[]) throws Exception {
Properties props = new Properties();
URL url = ClassLoader.getSystemResource("props.properties");
props.load(url.openStream());
System.out.println("prop1 :\n " + props.get("prop1"));
System.out.println("prop2 :\n " + props.get("prop2"));
}
}