images updates for website

tests/test.java

@@ -0,0 +1,16 @@
+import java.util.Map;
+import java.util.TreeSet;
+
+public class GetEnv {
+  /**
+   * let's test generics
+   * @param args the command line arguments
+   */
+  public static void main(String[] args) {
+    // get a map of environment variables
+    Map<String, String> env = System.getenv();
+    // build a sorted set out of the keys and iterate
+    for(String k: new TreeSet<String>(env.keySet())) {
+      System.out.printf("%s = %s\n", k, env.get(k));
+    }
+  }    }