55 lines
2.1 KiB
Java
55 lines
2.1 KiB
Java
// Copyright 2010-2018 Google LLC
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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import com.google.ortools.algorithms.KnapsackSolver;
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/**
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* Sample showing how to model using the knapsack solver.
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*
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*/
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public class Knapsack {
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static { System.loadLibrary("jniortools"); }
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private static void solve() {
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KnapsackSolver solver =
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new KnapsackSolver(KnapsackSolver.SolverType
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.KNAPSACK_MULTIDIMENSION_BRANCH_AND_BOUND_SOLVER,
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"test");
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final long[] profits = {360, 83, 59, 130, 431, 67, 230, 52, 93, 125,
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670, 892, 600, 38, 48, 147, 78, 256, 63, 17,
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120, 164, 432, 35, 92, 110, 22, 42, 50, 323,
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514, 28, 87, 73, 78, 15, 26, 78, 210, 36,
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85, 189, 274, 43, 33, 10, 19, 389, 276, 312};
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final long[][] weights = {
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{7, 0, 30, 22, 80, 94, 11, 81, 70, 64, 59, 18, 0, 36, 3, 8, 15,
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42, 9, 0, 42, 47, 52, 32, 26, 48, 55, 6, 29, 84, 2, 4, 18, 56,
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7, 29, 93, 44, 71, 3, 86, 66, 31, 65, 0, 79, 20, 65, 52, 13}};
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final long[] capacities = {850};
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final long optimalProfit = 7534;
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System.out.println("Solving knapsack with " + profits.length + " items");
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solver.init(profits, weights, capacities);
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final long computedProfit = solver.solve();
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System.out.println("Optimal_Profit = " + computedProfit + "/" +
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optimalProfit);
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}
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public static void main(String[] args) throws Exception { Knapsack.solve(); }
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}
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