/cs-java-hello-world-lab-codeU

Primary LanguageJavaOtherNOASSERTION

cs-hello-world-lab

Objectives

  1. Install Java SDK >= 1.7
  2. Print the version number to stdout

Instructions

  1. Install a recent Java runtime, if you haven't already. We recommend 1.8, but 1.7 will work, too.
  2. If you've been following along on Learn, we've walked you through installing Java (both the JRE and the JDK).
  3. But if you want to make sure, you can try running java or javac at your command line prompt. If it doesn't work, you probably don't have Java installed.
  4. In com.flatironschool.javacs.HelloWorld, we've provided a function getVersion(). It should print your system's current version of Java.
    1. We want not only to make this function work but also to make sure that it prints a version compatible with the upcoming lessons.
    2. You might find the following information useful:
      1. You can print information to stdout (usually, your console) with System.out.println().
      2. System.getProperty() will, you guessed it, get a system property (just pass in the name as a String, e.g. System.getProperty("myProperty")).
      3. The system properties "java.version" and "java.specification.version" will both return your system's current version of Java. The former, counter-intuitively, is more specific, and you might need to manipulate the String that it returns a bit more.
      4. Double.parseDouble() converts a String to a Double.

You can run ant or learn-test to test your results. Good luck!