1. implement a generic class movetofront that maintains a collection of items of generic type t. use the class linkedlist in the java api to implement movetofront. your class must provide the following instance methods. push: that adds an item to the collection, removing previous occurrences. pop: that removes the item added the latest to the collection. contains: that returns true if a given item is in the collection, or false otherwise. isempty? : that returns true if the collection is empty, or false otherwise. 2. write a testmtf class with a main() method that tests all operations of the movetofront class above. override the tostring() method of the class object, and use it to display all the items in the collection after each method is called.

Formatting rows and columns is similar to cell formatting. in an openoffice calc spreadsheet, you can format data entered into rows and columns with the of the rows and columns options. you can insert rows and columns into, or delete rows and columns from, a spreadsheet. use the insert or delete rows and columns option on the insert tab. alternatively, select the row or column where you want new rows or columns to appear, right-click, and select insert only row or only column options. you can hide or show rows and columns in a spreadsheet. use the hide or show option on the format tab. for example, to hide a row, first select the row, then choose the insert tab, then select the row option, and then select hide. alternatively, you can select the row or columns, right-click, and select the hide or show option. you can adjust the height of rows and width of columns. select row and then select the height option on the format tab. similarly, select column, then select the width option on the format tab. alternatively, you can hold the mouse on the row and column divider, and drag the double arrow to the position. you can also use the autofit option on the table tab to resize rows and columns.