lpmethod.java.
/ *版权所有2019，Gurobi优狗万app足彩化，LLC * // *通过方法参数的不同值解决模型;显示哪个值给出最短的解决时间。* /进口gurobi。*;公共类LPMethod {公共静态void main（String [] args）{if（args.length <1）{system.out.println（“用法：java lpmethod filename”）;system.exit（1）;}尝试{//读取模型grbenv ent = new grbenv（）;grbmodel模型=新grbmodel（env，args [0]）;//用不同的方法int bestmethod = -1解决模型;double besttime = model.get（grb.doubleparam.timelimit）;for（int i = 0; i <= 2; ++ i）{model.reset（）; model.set(GRB.IntParam.Method, i); model.optimize(); if (model.get(GRB.IntAttr.Status) == GRB.Status.OPTIMAL) { bestTime = model.get(GRB.DoubleAttr.Runtime); bestMethod = i; // Reduce the TimeLimit parameter to save time // with other methods model.set(GRB.DoubleParam.TimeLimit, bestTime); } } // Report which method was fastest if (bestMethod == -1) { System.out.println("Unable to solve this model"); } else { System.out.println("Solved in " + bestTime + " seconds with Method: " + bestMethod); } // Dispose of model and environment model.dispose(); env.dispose(); } catch (GRBException e) { System.out.println("Error code: " + e.getErrorCode() + ". " + e.getMessage()); } } }
