Java program help

Discussion in 'Silicon (v)Alley' started by Misc, Sep 12, 2009.

  1. I have to create a program which constructs trig tables; these tables are created using the "-" and "|" keys, and the number of columns is a dynamic value based on user input at the start of the program. Each cell in the program must contain the value of a trig function, and the table will be populated with these values over a range of numbers.

    I don't know how to create this table.
    And I don't understand how I'll be able to create a cell reference so that I can input the data.

  2. I would create two objects here. A cell object and a table object so you can fill your table w/ your 'cells'. So 3 operating classes here. your main program that creates the tableObject, your tableObject class defining the table, and the CellObject class with cell definitions.

    I'll throw you up a class framework when i get some extra time tonight. If you need any help after that feel free to ask

  3. #3 philan, Sep 13, 2009
    Last edited by a moderator: Sep 13, 2009
    This is just a framing and only a partial to give you some inspiration. If you need more elaboration just holla.

    the List is to hold all the Cells

    Simple tableObject class

    public class tableObject
    private int _numberOfColumns;
    private int _numberOfRows;
    private List<CellObject> _cellList;
    private ColumnHeaders _myHeaders;
    private enum ColumnHeaders {Degree, Radians, Sin, Cos, Tan, Csc, Sec, Cot}
    private StringBuilder _sbTableString;

    public tableObject(int p_intNumColumns, int p_intRangeStart, int p_intRangeEnd)

    _sbTableString = new StringBuilder();

    _numberOfColumns = p_intNumColumns;
    _numberOfRows = (p_intRangeStart - p_intRangeEnd) + 1;
    //+1 because the last number in the range is included

    _cellList = new List<CellObject>();

    CreateTableCells(p_intNumColumns, p_intRangeStart, p_intRangeEnd);

    private void CreateTableCells(int p_intNumColumns, int p_intRangeStart, int p_intRangeEnd)


    public void CreateHeader()


    public float getCellValue(int p_intColumn, int p_intRow)
    //Will need logic here to return appropriate cell, this is just an example so picking the first one in the list and returning

    CellObject _myCell = (CellObject)_cellList[0];

    return _myCell.getCellValue();

    public string GetTable()
    if (_cellList.Count > 0)

    return "Table contains no cells";

    cellObject class

    class CellObject

    private float _cellValue;
    private string _cellColumnName;

    public CellObject(float p_longCellData, string p_strName)
    _cellColumnName = p_strName;
    _cellValue = p_longCellData;

    public float getCellValue()
    return _cellValue;

    main program

    int intNumberOfColumns = 3;
    int intRangeStart = 10;
    int intRangeEnd = 24;

    tableObject myTable = new tableObject(intNumberOfColumns, intRangeStart, intRangeEnd);

    textBox1.Text = myTable.GetTable();

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