Have a taskInfomation(list) include distribution center (0) and lots of tasks,so how to model in gurobi use java? As follow the picture.xijrk is binary variable

        for (int k = 0; k < VehicleInfo.size(); k++) {
            for (int r = 0; r < Route.getTrip(); r++) {
                for (int i = 0; i < 1; i++) {
                    for (int j = 1; j < taskInfo.size()-1; j++) {
                        GRBLinExpr expr = new GRBLinExpr();
                        expr.addTerm(1, csVariable.x[i][j][k][r]);
                        model.addConstr(expr, GRB.Less_EQUAL, 1, "name" + i + "_" + j + "_" + k + "_" + r);
                    }
                }
            }
        }