Chapter 7, Problem 3PP

Program Plan Intro

Program on restroom

Program plan:

• In a file “Restroom.java”, create a class “Restroom”,
  • Declare the Boolean array variable.
  • Define the constructor,
    • Assign the initial values.
  • Define a method “addOccupant()”,
    • Initialize the first stall in the longest unoccupied sequence.
    • Initialize the number of stalls in the longest unoccupied sequence.
    • Initialize the index of current sequence of unoccupied stalls.
    • Initialize the number of current sequence of unoccupied stalls.
    • Check whether the first stall is unoccupied,
      • If it is true, assign the values to start the sequence.
        • Create a loop to iterate over stalls,
        • • Check whether the current stall is occupied,
            • Check whether the run is end,
              • Assign the values.
          • Set the count to “0”.
          • Otherwise, check whether the user in the middle of a run of unoccupied stalls,
            • Increment the count, if it is true.
          • Otherwise, assign the values.
        • Check for the case when longest sequence is at the end,
        • • Assign the values.
        • Assign the array value to true.
  • Define a method “getStalls()”,
    • Initialize the necessary string variable.
    • Create loop,
      • Check the condition,
        • Concatenate the string with “X”.
        • • Otherwise,
            • Concatenate the string with “_”.
    • Return the updated string.
• In a file “RestroomTester.java”, create a class “RestroomTester”,
  • Define the method “main()”,
    • Initialize the variable for number of stalls.
    • Print the number of stalls.
    • Create the object for “Restroom”.
    • Call the method “addOccupant()”.
    • Print the value returned from the method “getStalls()”.
    • Print the expected occupied position.
    • Call the method “addOccupant()”.
    • Print the value returned from the method “getStalls()”.
    • Print the expected occupied position.