package kata.app7;

import kata.lib.HelloLib;

public class HelloApp7 {

    public static void main(String... args) {
        System.out.println("Hello Java 7 App!");
        
        System.out.println(String.format(
            "This app is running under Java version %s", System.getProperty("java.version")));
        
        System.out.println(String.format(
            "on %s %s\n", System.getProperty("os.name"), System.getProperty("os.version")));

        HelloLib lib = new HelloLib();
        
        lib.doSomething();
        lib.doSomethingElse();
    }
}

Create HelloApp7.java