initial commit of linear solver wrappers in C++/java/Python

com/google/ortools/linearsolver/samples/IntegerSolverExample.java

@@ -0,0 +1,54 @@
+// Copyright 2010 Google
+// 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.
+
+package com.google.ortools.linearsolver.samples;
+
+import com.google.ortools.linearsolver.MPConstraint;
+import com.google.ortools.linearsolver.MPSolver;
+import com.google.ortools.linearsolver.MPVariable;
+
+/**
+ * Example of linear solver usage.
+ *
+ */
+
+public class IntegerSolverExample {
+
+  static {
+    System.loadLibrary("jnilinearsolver");
+  }
+
+
+  private static void runFirstIntegerExample(int solverType) {
+    MPSolver solver = new MPSolver("runFirstIntegerExample", solverType);
+    double infinity = solver.infinity();
+    MPVariable x1 = solver.makeIntVar(0.0, infinity, "x1");
+    MPVariable x2 = solver.makeIntVar(0.0, infinity, "x2");
+
+    solver.addObjectiveTerm(x1, 1);
+    solver.addObjectiveTerm(x2, 2);
+
+    MPConstraint ct = solver.makeConstraint(17, infinity);
+    ct.addTerm(x1, 3);
+    ct.addTerm(x2, 2);
+
+    // Check the solution.
+    solver.solve();
+    System.out.println("Objective value = " +  solver.objectiveValue());
+  }
+
+  public static void main(String[] args) throws Exception {
+    runFirstIntegerExample(MPSolver.CLP_LINEAR_PROGRAMMING);
+    runFirstIntegerExample(MPSolver.GLPK_LINEAR_PROGRAMMING);
+  }
+}