First, launch netbeans and close any previous projects that may be open (at the top menu go to file ==> close all projects).

then create a new java application called "rooter" (without the quotation marks) to get a positive integer (i. e. any number greater than 0) called "start" from the user at the command line and then find the square root of every number from "start" down through 0. use a while loop to count down. as an example, if the user entered 8, you would find the square root of 8, then the square root of 7, and so on.

print each square root on a separate line. include data validation to ensure the user provides a positive integer. if the validation is not passed, provide the user with suitable feedback and stay in the program to let the user try again until valid input is received. use the math. sqrt(double a) method to find each square root and output the integer and four decimal positions.

thoughts
refer to horstmann chapter 2 for details on formatting output values.
***note: include commenting in your code***

Let r be a robotic arm with a fixed base and seven links. the last joint of r is a prismatic joint, the other ones are revolute joints. give a set of parameters that determines a placement of r. what is the dimension of the configuration space resulting from your choice of parameters?

Column a of irma’s spreadsheet contains titles for each row, but her document is too big and will be printed three pages across. she wants to be sure that every page will be understood. what can irma do to with this problem?

7.23 main lab 7 - online shopping cart background this main lab extends the earlier prep lab "online shopping cart part 1". (you should save this as a separate project from the earlier prep lab). you will create an on-line shopping cart like you might use for your on-line purchases. the goal is to become comfortable with setting up classes and using objects. requirements this lab can be done individually or as pair programming. expanded itemtopurchase class (15 points) extend the itemtopurchase class as follows. we will not do unit testing in this lab so we will not be giving you the names of the member functions. create good ones on your own. create a parameterized constructor to assign item name, item description, item price, and item quantity (default values of "none" for name and description, and 0 for price and quantity). additional public member functions set an item description get an item description print the cost of an item - outputs the item name followed by the quantity, price, and subtotal (see example) print the description of an item - outputs the item name and description (see example) additional private data members a string for the description of the item. example output of the function which prints the cost of an item: bottled water 10 @ $1.50 = $15.00 example output of the function which prints the item description: