make(java): Update examples to use maven (#202)

* Fix RandomTsp.java

examples/java/IntegerProgramming.java

@@ -10,24 +10,16 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
+package com.google.ortools.java;
 
-package com.google.ortools.examples;
-
+import com.google.ortools.Loader;
 import com.google.ortools.linearsolver.MPConstraint;
 import com.google.ortools.linearsolver.MPObjective;
 import com.google.ortools.linearsolver.MPSolver;
 import com.google.ortools.linearsolver.MPVariable;
 
-/**
- * Integer programming example that shows how to use the API.
- *
- */
-
+/** Integer programming example that shows how to use the API. */
 public class IntegerProgramming {
-  static {
-    System.loadLibrary("jniortools");
-  }
-
   private static void runIntegerProgrammingExample(String solverType) {
     MPSolver solver = MPSolver.createSolver(solverType);
     if (solver == null) {
@@ -79,6 +71,7 @@ public class IntegerProgramming {
   }
 
   public static void main(String[] args) throws Exception {
+    Loader.loadNativeLibraries();
     System.out.println("---- Integer programming example with SCIP (recommended) ----");
     runIntegerProgrammingExample("SCIP");
     System.out.println("---- Integer programming example with CBC ----");