examples/java: Update, indent and add [Interesting] tags to examples

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

examples/java/Isr.java

@@ -23,32 +23,30 @@
  */
 
 public class Isr {
-  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);
+    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[]) {
-    mraa.mraa.init();
+    public static void main(String argv[]) throws InterruptedException {
+        mraa.mraa.init();
 
-    mraa.Gpio gpio = new mraa.Gpio(7);
+        mraa.Gpio gpio = new mraa.Gpio(7);
 
-    mraa.IsrCallback callback = new JavaCallback();
+        mraa.IsrCallback callback = new JavaCallback();
 
-    gpio.isr(mraa.Edge.EDGE_RISING, callback, null);
-    while (true)
-      ;
-  };
+        gpio.isr(mraa.Edge.EDGE_RISING, callback);
+        Thread.sleep(0);
+    };
 }
-;
 
 class JavaCallback extends mraa.IsrCallback {
-  public JavaCallback() { super(); }
+    public JavaCallback() { super(); }
 
-  public void run() { System.out.println("JavaCallback.run()"); }
+    public void run() { System.out.println("JavaCallback.run()"); }
 }