jds
Interface Matrix

All Known Implementing Classes:

SparseMatrix

public abstract interface Matrix

extends java.io.Serializable

Matrix - two dimensional indexed collection; for use with book Classic Data Structures in Java by Timothy A Budd, published by Addison-Wesley, 2001.

See Also:

Collection

Fields inherited from class java.io.Serializable

serialVersionUID

Method Summary

java.lang.Object	elementAt(int row, int column) find element at give location
int	numberColumns() determine number of columns in matrix
int	numberRows() determine number of rows in matrix
void	setElementAt(java.lang.Object val, int row, int column) change element at given location
void	setSize(int rows, int columns) set bounds in number of rows and columns

Method Detail

setSize

public void setSize(int rows,
                    int columns)

set bounds in number of rows and columns

Parameters:

rows - number of rows in matrix

columns - number of columns in matrix

numberRows

public int numberRows()

determine number of rows in matrix

Returns:

number of rows as integer

numberColumns

public int numberColumns()

determine number of columns in matrix

Returns:

number of columns in matrix as integer

elementAt

public java.lang.Object elementAt(int row,
                                  int column)

find element at give location

Parameters:

row - index for row dimension of matrix

column - index for column dimension of matrix

Returns:

object stored at given location

Throws:

java.lang.ArrayIndexOutOfBoundsException - index is illegal

setElementAt

public void setElementAt(java.lang.Object val,
                         int row,
                         int column)

change element at given location

Parameters:

val - new value for position

row - index for row dimension of matrix

column - index for column dimension of matrix

Throws:

java.lang.ArrayIndexOutOfBoundsException - index is illegal