examples/java: Port examples containing [Interesting] tag from C/C++

Signed-off-by: Petre Eftime <petre.p.eftime@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

examples/java/HelloEdison.java

@@ -0,0 +1,73 @@
+/*
+ * Author: Brendan Le Foll <brendan.le.foll@intel.com>
+ * Author: Petre Eftime <petre.p.eftime@intel.com>
+ * Copyright (c) 2015 Intel Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+//! [Interesting]
+import mraa.Dir;
+import mraa.Gpio;
+import mraa.IntelEdison;
+import mraa.mraa;
+import mraa.Platform;
+import mraa.Result;
+
+public class HelloEdison {
+  static {
+    try {
+      System.loadLibrary("mraajava");
+    } catch (UnsatisfiedLinkError e) {
+      System.err.println(
+          "Native code library failed to load. See the chapter on Dynamic Linking Problems in the SWIG Java documentation for help.\n" +
+          e);
+      System.exit(1);
+    }
+  }
+  public static void main(String argv[]) {
+    Platform platform = mraa.getPlatformType();
+    
+    if (platform != Platform.INTEL_EDISON_FAB_C) {
+        System.err.println("Error: This program can only be run on edison");
+        System.exit(Result.ERROR_INVALID_PLATFORM.swigValue());
+    }
+    
+    /* 
+     * MRAA_INTEL_EDISON_GP182 == 0, so this will initialise pin0 on arduino,
+     * which is hardware GPIO 130 and not 182
+     * We set the owner to false here, this makes sure that we do not close the
+     * gpio from sysfs in mraa_gpio_close meaning it will stay as an output and
+     * we will not always transition from 0->1 as gpio182 as output has the
+     * default position of '0'. Note that the value could change as a result of
+     * a mraa_gpio_dir however meaning we always go from 0->1 or 1->0
+     */
+    Gpio gpio182 = new Gpio(IntelEdison.INTEL_EDISON_GP182.swigValue(), false);
+    gpio182.dir(Dir.DIR_OUT);
+    
+    int val = gpio182.read();
+    
+    System.out.println(String.format("GPIO%d (mraa pin %d) was: %d, will set to %d\n", 182,
+            gpio182.getPin(), val, val == 0 ? 1 : 0));
+    
+    gpio182.write(val == 0 ? 1 : 0);
+  };
+}
+//! [Interesting]