diff --git a/examples/contrib/CMakeLists.txt b/examples/contrib/CMakeLists.txt
index 4f1bd84448..8bdf6594a1 100644
--- a/examples/contrib/CMakeLists.txt
+++ b/examples/contrib/CMakeLists.txt
@@ -40,7 +40,10 @@ if(BUILD_PYTHON_EXAMPLES)
 endif()
 
 if(BUILD_JAVA_EXAMPLES)
-
+  file(GLOB JAVA_SRCS "*.java")
+  foreach(SAMPLE IN LISTS JAVA_SRCS)
+    add_java_example(${SAMPLE})
+  endforeach()
 endif()
 
 if(BUILD_DOTNET_EXAMPLES)
diff --git a/examples/contrib/CoinsGrid.java b/examples/contrib/CoinsGrid.java
index 30a9f4d045..b41c2c5ca7 100644
--- a/examples/contrib/CoinsGrid.java
+++ b/examples/contrib/CoinsGrid.java
@@ -26,15 +26,11 @@ public class CoinsGrid {
   private static void solve() {
     Solver solver = new Solver("CoinsGrid");
 
-    //
     // data
-    //
-    int n = 31;
-    int c = 14;
+    int n = 5; //31;
+    int c = 2; //14;
 
-    //
     // variables
-    //
     IntVar[][] x = new IntVar[n][n];
     IntVar[] x_flat = new IntVar[n * n];
 
@@ -45,9 +41,7 @@ public class CoinsGrid {
       }
     }
 
-    //
     // constraints
-    //
 
     // sum row/columns == c
     for (int i = 0; i < n; i++) {
@@ -70,22 +64,16 @@ public class CoinsGrid {
     }
     IntVar obj_var = solver.makeSum(obj_tmp).var();
 
-    //
     // objective
-    //
     OptimizeVar obj = solver.makeMinimize(obj_var, 1);
 
-    //
     // search
-    //
     DecisionBuilder db =
         solver.makePhase(x_flat, solver.CHOOSE_FIRST_UNBOUND, solver.ASSIGN_MAX_VALUE);
 
     solver.newSearch(db, obj);
 
-    //
     // output
-    //
     while (solver.nextSolution()) {
       System.out.println("obj_var: " + obj_var.value());
       for (int i = 0; i < n; i++) {
diff --git a/examples/java/CMakeLists.txt b/examples/java/CMakeLists.txt
index 36fef4dfef..88ad82b3fc 100644
--- a/examples/java/CMakeLists.txt
+++ b/examples/java/CMakeLists.txt
@@ -2,3 +2,7 @@ if(NOT BUILD_JAVA_EXAMPLES)
 	return()
 endif()
 
+file(GLOB JAVA_SRCS "*.java")
+foreach(SAMPLE IN LISTS JAVA_SRCS)
+  add_java_example(${SAMPLE})
+endforeach()