问使用二维数组和for循环的Mailman邮箱问题

EN

public class CS2LAB1 {
public static void main(String[] args)
{

    boolean[] mailboxes = new boolean[149];

    /*this function sets all mailbox doors to closed*/
    for(int i = 0; i <= mailboxes.length; i++)
    {
     mailboxes[i] = false;
    }

    /*This function uses a for loop to begin at mailbox 2 and open every even mailbox
    */
    for(int count = 1; count <= mailboxes.length; count = count + 2)
    {
     mailboxes[count] = true;
    }

    /*This function starts at 3 and opens every 3rd mailbox, next it goes to 4 and opens every 3rd mailbox followed by the 4th then 5th then 6th */
    for(int count2 = 2; count2<=mailboxes.length; count2++)
    {
        for(int count3 = count2; count3 <= mailboxes.length; count3 = count3 + count2)
        {
          if(mailboxes[count2] = true)
          { mailboxes[count2] = false;}
          else{ mailboxes[count2] = true;}    
        }
    }

    /*This function outputs all the closed doors*/
    for(int print =0; mailboxes.length>=print; print++)
        if(mailboxes[print] = false)
        {
            System.out.println("Mailbox" + print++ + "is closed" );
        }
}

    for(int count2 = 2; count2<= 149; count2++)
    {
        for(int count3 = 2; count3 <= 149; count3 = count3 + 3)
        {
          if(mailboxes[count3] = false)
          { mailboxes[count3] = true;}
          else{ mailboxes[count3] = false;}    
        }
    }