示例mip1.java.

这是我们示例的完整源代码（也可用 / examples/java/mip1.java）......
/ *版权所有2020，Gurobi优狗万app足彩化，LLC * / / *此示例制定和解决以下简单的MIP模型：最大化x + y + 2 z对x + 2 y + 3 z <= 4 x + y> = 1 x，y，z二进制* /导入gurobi。*;公共类MIP1 {公共静态void main（String [] args）{try {//创建空环境，设置选项，启动grbenv ent = new grbenv（true）;env.set（“logfile”，“mip1.log”）;env.start（）;//创建空型号grbmodel model = new grbmodel（env）;//创建变量grbvar x = model.addvar（0.0，1.0,0.0，grb.binary，“x”）;grbvar y = model.addvar（0.0，1.0,0.0，grb.binary，“Y”）;grbvar z = model.addvar（0.0，1.0,0.0，grb.binary，“z”）;//设置目标：最大化x + y + 2 z glblinexpr expr = new grblinexpr（）;expr.addterm（1.0，x）; expr.addTerm(1.0, y); expr.addTerm(2.0, z); model.setObjective(expr, GRB.MAXIMIZE); // Add constraint: x + 2 y + 3 z <= 4 expr = new GRBLinExpr(); expr.addTerm(1.0, x); expr.addTerm(2.0, y); expr.addTerm(3.0, z); model.addConstr(expr, GRB.LESS_EQUAL, 4.0, "c0"); // Add constraint: x + y >= 1 expr = new GRBLinExpr(); expr.addTerm(1.0, x); expr.addTerm(1.0, y); model.addConstr(expr, GRB.GREATER_EQUAL, 1.0, "c1"); // Optimize model model.optimize(); System.out.println(x.get(GRB.StringAttr.VarName) + " " +x.get(GRB.DoubleAttr.X)); System.out.println(y.get(GRB.StringAttr.VarName) + " " +y.get(GRB.DoubleAttr.X)); System.out.println(z.get(GRB.StringAttr.VarName) + " " +z.get(GRB.DoubleAttr.X)); System.out.println("Obj: " + model.get(GRB.DoubleAttr.ObjVal)); // Dispose of model and environment model.dispose(); env.dispose(); } catch (GRBException e) { System.out.println("Error code: " + e.getErrorCode() + ". " + e.getMessage()); } } }