readFile public statie double[] [] readFile (java.io.File file) throws java.io.FileNotFoundException Reads from a file and returns a ragged aray of doubles The maximum rows is 10 and the maximum columns for each row is 10 Each row in the file is separated by a new line Each element in the row is separated by a space Suggestion: You need to know how many rows and how many columns there are for each row to create a ragged array. 1. Read the doubles from the file into an a temporary array [10][10] of Strings which was initialized to nulls. 2. Find out how many rows there are (any row that has the first element != null is a valid row) 3. Create the array based on the num of rows, i.e. double[][Jarray = new double[#rows][] 4. Determine the number of columns for the first row (any element !=null is a valid element) 5. Create the first row, i.e. array[0] = new double[#columns] 6. Put the values from the temporary array into in the row (don't forget to convert from strings to doubles) 7. Repeat for all rows Parameters: file- the file to read from Returns: a two dimensional ragged (depending on data) array of doubles if the file is not empty, returns a null if file is empty Throws: java.io.FileNotFoundException

readFile public statie double[] [] readFile (java.io.File file) throws java.io.FileNotFoundException Reads from a file and returns a ragged aray of doubles The maximum rows is 10 and the maximum columns for each row is 10 Each row in the file is separated by a new line Each element in the row is separated by a space Suggestion: You need to know how many rows and how many columns there are for each row to create a ragged array. 1. Read the doubles from the file into an a temporary array [10][10] of Strings which was initialized to nulls. 2. Find out how many rows there are (any row that has the first element != null is a valid row) 3. Create the array based on the num of rows, i.e. double[][Jarray = new double[#rows][] 4. Determine the number of columns for the first row (any element !=null is a valid element) 5. Create the first row, i.e. array[0] = new double[#columns] 6. Put the values from the temporary array into in the row (don't forget to convert from strings to doubles) 7. Repeat for all rows Parameters: file- the file to read from Returns: a two dimensional ragged (depending on data) array of doubles if the file is not empty, returns a null if file is empty Throws: java.io.FileNotFoundException

EBK JAVA PROGRAMMING

9th Edition

ISBN:9781337671385

Author:FARRELL

Publisher:FARRELL

Chapter9: Advanced Array Concepts

Section: Chapter Questions

Problem 2PE

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