Add Simple Cp Program

ortools/constraint_solver/samples/SimpleCpProgram.java

@@ -0,0 +1,75 @@
+// Copyright 2010-2018 Google LLC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// 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.
+
+// [START program]
+// [START import]
+import com.google.ortools.constraintsolver.DecisionBuilder;
+import com.google.ortools.constraintsolver.IntVar;
+import com.google.ortools.constraintsolver.Solver;
+import java.util.logging.Logger;
+// [END import]
+
+/** Simple CP Program.*/
+public class SimpleCpProgram {
+  static {
+    System.loadLibrary("jniortools");
+  }
+
+  private static final Logger logger = Logger.getLogger(SimpleCpProgram.class.getName());
+
+  public static void main(String[] args) throws Exception {
+    // Instantiate the solver.
+    // [START solver]
+    Solver solver = new Solver("CpSimple");
+    // [END solver]
+
+    // Create the variables.
+    // [START variables]
+    final long numVals = 3;
+    final IntVar x = solver.makeIntVar(0, numVals - 1, "x");
+    final IntVar y = solver.makeIntVar(0, numVals - 1, "y");
+    final IntVar z = solver.makeIntVar(0, numVals - 1, "z");
+    // [END variables]
+
+    // Constraint 0: x != y..
+    // [START constraints]
+    solver.addConstraint(solver.makeAllDifferent(new IntVar[] {x, y}));
+    logger.info("Number of constraints: " + solver.constraints());
+    // [END constraints]
+
+    // Solve the problem.
+    // [START solve]
+    final DecisionBuilder db = solver.makePhase(
+        new IntVar[] {x, y, z}, Solver.CHOOSE_FIRST_UNBOUND, Solver.ASSIGN_MIN_VALUE);
+    // [END solve]
+
+    // Print solution on console.
+    // [START print_solution]
+    int count = 0;
+    solver.newSearch(db);
+    while (solver.nextSolution()) {
+      ++count;
+      logger.info(
+          String.format("Solution: %d\n x=%d y=%d z=%d", count, x.value(), y.value(), z.value()));
+    }
+    solver.endSearch();
+    logger.info("Number of solutions found: " + solver.solutions());
+    // [END print_solution]
+
+    // [START advanced]
+    logger.info(String.format("Advanced usage:\nProblem solved in %d ms\nMemory usage: %d bytes",
+        solver.wallTime(), Solver.memoryUsage()));
+    // [END advanced]
+  }
+}
+// [END program]