Move java examples

examples/java/SendMoreMoney.java

@@ -0,0 +1,91 @@
+// Copyright 2011 Hakan Kjellerstrand hakank@gmail.com
+// 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.
+import java.io.*;
+import java.util.*;
+import java.text.*;
+
+import com.google.ortools.constraintsolver.DecisionBuilder;
+import com.google.ortools.constraintsolver.IntVar;
+import com.google.ortools.constraintsolver.Solver;
+
+public class SendMoreMoney {
+
+  static {
+    System.loadLibrary("jniortools");
+  }
+
+
+  /**
+   *
+   * Solves the SEND+MORE=MONEY problem.
+   *
+   */
+  private static void solve() {
+    int base = 10;
+
+    Solver solver = new Solver("SendMoreMoney");
+    IntVar s = solver.makeIntVar(0, base - 1, "s");
+    IntVar e = solver.makeIntVar(0, base - 1, "e");
+    IntVar n = solver.makeIntVar(0, base - 1, "n");
+    IntVar d = solver.makeIntVar(0, base - 1, "d");
+    IntVar m = solver.makeIntVar(0, base - 1, "m");
+    IntVar o = solver.makeIntVar(0, base - 1, "o");
+    IntVar r = solver.makeIntVar(0, base - 1, "r");
+    IntVar y = solver.makeIntVar(0, base - 1, "y");
+
+    IntVar[] x = {s,e,n,d,m,o,r,y};
+
+    IntVar[] eq = {s,e,n,d,  m,o,r,e, m,o,n,e,y};
+    int[] coeffs = {1000, 100, 10, 1,            //    S E N D +
+                    1000, 100, 10, 1,            //    M O R E
+                    -10000, -1000, -100, -10, -1 // == M O N E Y
+    };
+    solver.addConstraint(solver.makeScalProdEquality(eq, coeffs, 0));
+
+    // alternative:
+    solver.addConstraint(
+        solver.makeScalProdEquality(new IntVar[] {s,e,n,d,  m,o,r,e, m,o,n,e,y},
+                                    coeffs, 0));
+
+    // s > 0
+    solver.addConstraint(solver.makeGreater(s, 0));
+    // m > 0
+    solver.addConstraint(solver.makeGreater(m, 0));
+
+    solver.addConstraint(solver.makeAllDifferent(x));
+
+    DecisionBuilder db = solver.makePhase(x,
+                                          solver.INT_VAR_DEFAULT,
+                                          solver.INT_VALUE_DEFAULT);
+    solver.newSearch(db);
+    while (solver.nextSolution()) {
+      for(int i = 0; i < 8; i++) {
+        System.out.print(x[i].toString() + " ");
+      }
+      System.out.println();
+    }
+    solver.endSearch();
+
+    // Statistics
+    System.out.println();
+    System.out.println("Solutions: " + solver.solutions());
+    System.out.println("Failures: " + solver.failures());
+    System.out.println("Branches: " + solver.branches());
+    System.out.println("Wall time: " + solver.wallTime() + "ms");
+
+  }
+
+  public static void main(String[] args) throws Exception {
+    SendMoreMoney.solve();
+  }
+}