Lecture 4 February 10, 2000 There will be a Quiz • February 17 – Last term, it was to write an application that prints your name. DOS Environment Variables • Each variable has a name and a value – Both parts are strings. – The command interpreter and application programs can find out the value (if any) of any variable. • Use set to list and alter environment variables • Examples – PATH • Value is a semicolon-separated list of directories. • Used by the command interpreter to search for command files. – CLASSPATH • Value is a semicolon-separated list of directories. • Used by JDK tools to search for class files. Looking Things Up • Using the JDK Documentation – Using the Java API Documentation – Using the Java Tools Documentation Two Dimensional Arrays • An array can have any number of subscripts. • Example boolean truth = new boolean; truth 2D Array Sample Code • [ TruthMatrix.java ] – Download this program and experiment with it. Exercise 2 • Due February 17 • Write a Java application that prints each of the command line arguments on a separate line on the console.