AppointmentBook.java

public class AppointmentBook {
    private boolean[][] schedule;

    public AppointmentBook (boolean[][] schedule)
    {
        this.schedule = schedule;
    }
    /**
     * Returns true if minute in period is available for an appointment and returns
     * false otherwise
     * Preconditions: 1 <= period <= 8; 0 <= minute <= 59
     */
    private boolean isMinuteFree(int period, int minute) {
        return schedule[period-1][minute];
        /* implementation not shown */ }

    public void printPeriod(int period){
        for (int i = 0; i < schedule[period-1].length; i++){
            System.out.println(i + " " + schedule[period-1][i]);
        }
    }

    /**
     * Marks the block of minutes that starts at startMinute in period and
     * is duration minutes long as reserved for an appointment
     * Preconditions: 1 <= period <= 8; 0 <= startMinute <= 59;
     * 1 <= duration <= 60
     */
    private void reserveBlock(int period, int startMinute, int duration) {
        for (int i = startMinute; i < startMinute + duration; i++){
            schedule[period-1][i] = false;
        }
        /* implementation not shown */ }

    public void printBlock(int period, int startMinute, int endMinute){
        for (int i = startMinute; i <= endMinute; i++){
            System.out.print(schedule[period-1][i] + " ");
        }
        System.out.println();
    }

    /**
     * Searches for the first block of duration free minutes during period, as
     * described in
     * part (a). Returns the first minute in the block if such a block is found or
     * returns -1 if no
     * such block is found.
     * Preconditions: 1 <= period <= 8; 1 <= duration <= 60
     */
    public int findFreeBlock(int period, int duration) {
        int blockLength = 0;
        for (int i = 0; i<60; i++){
            if (isMinuteFree(period, i)){
                blockLength ++;
                if(blockLength == duration){
                    return i - duration + 1;
                }
            }
            else {blockLength = 0;}
        }
        return -1;
        /* to be implemented in part (a) */ }

    /**
     * Searches periods from startPeriod to endPeriod, inclusive, for a block
     * of duration free minutes, as described in part (b). If such a block is found,
     * calls reserveBlock to reserve the block of minutes and returns true;
     * otherwise
     * returns false.
     * Preconditions: 1 <= startPeriod <= endPeriod <= 8; 1 <= duration <= 60
     */
    public boolean makeAppointment(int startPeriod, int endPeriod, int duration){
        int startDuration;
        for (int r = startPeriod; r <= endPeriod; r++){
            startDuration = findFreeBlock(r, duration);
            if (startDuration != -1){
                reserveBlock(r, startDuration, duration);
                return true;
            }
        }
        return false;
        /* to be implemented in part (b) */ }

    // There may be instance variables, constructors, and methods that are not shown.

}