如何通过Cplex api在Java中使用指示器约束？

import ilog.concert.*;
import ilog.cplex.*;

IloCplex cplex = new IloCplex();
IloNumVar x = cplex.numVar(0, Double.MAX_VALUE, "x");
IloNumVar y = cplex.numVar(0, Double.MAX_VALUE, "y");
IloNumVar z = cplex.numVar(0, Double.MAX_VALUE, "z");

IloRange indicatorConstraint = cplex.indicatorConstraint(
    cplex.le(x, 10), // 指示条件
    cplex.eq(y, 20)  // 约束条件
);

IloObjective objective = cplex.maximize(cplex.sum(x, y, z));
cplex.add(objective);

cplex.addEq(cplex.sum(x, y, z), 100);
cplex.add(indicatorConstraint);

if (cplex.solve()) {
    double solutionX = cplex.getValue(x);
    double solutionY = cplex.getValue(y);
    double solutionZ = cplex.getValue(z);
    System.out.println("Solution: x = " + solutionX + ", y = " + solutionY + ", z = " + solutionZ);
} else {
    System.out.println("No solution found");
}