Chapter 3.9, Problem 3.27CP

What is wrong with the following switch statement?

  // This code has errors!!!

  switch (temp)

  {

   case temp < 0 :

    System.out.println(“Temp is negative.”);

    break;

   case temp = 0;

    System.out.println(“Temp is zero.”);

    break;

   case temp > 0 :

    System.out.println(“Temp is positive.”);

    break;

  }