CSE110 Lecture 29

Principles of Programming with Java
Bidimensional Arrays
(201707)

Transcript

1. CSE110
   Principles of Programming
   with Java
   Lecture 31:
   Bidimensional Arrays
   Javier Gonzalez-Sanchez
   javiergs@asu.edu
   javiergs.engineering.asu.edu
   Office Hours: By appointment
   

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2. Javier Gonzalez-Sanchez | CSE110 | Summer 2017 | 2
   One-dimensional Array
   • A one-dimensional array stores a list of elements
   0
   0
   0
   0
   0
   0
   0
   1
   2
   3
   4
   5
   int []array = new int [6]
   array
   

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3. Javier Gonzalez-Sanchez | CSE110 | Summer 2017 | 3
   One-dimensional Array
   • A two-dimensional array can be thought of as a
   table of elements, with rows and columns
   0
   1
   2
   3
   4
   5
   int [][]array = new int [6][3]
   array
   0 0 0
   0 0 0
   0 0 0
   0 0 0
   0 0 0
   0 0 0
   0 1 2
   

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4. Javier Gonzalez-Sanchez | CSE110 | Summer 2017 | 4
   Two-dimensional Array
   • A two-dimensional array is an array of arrays
   • A two-dimensional array is declared by specifying
   the size of each dimension separately
   int[][] scores = new int[12][50];
   • A array element is referenced using two index
   values
   value = scores[3][6]
   

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5. Javier Gonzalez-Sanchez | CSE110 | Summer 2017 | 5
   Two-dimensional Array
   The array stored in one row can be specified using
   one index
   

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6. Javier Gonzalez-Sanchez | CSE110 | Summer 2017 | 6
   Example 1
   

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7. Javier Gonzalez-Sanchez | CSE110 | Summer 2017 | 7
   Example 2
   

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8. Javier Gonzalez-Sanchez | CSE110 | Summer 2017 | 8
   Reference
   Section 6.7 page 282
   

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9. CSE110 - Principles of Programming
   Javier Gonzalez-Sanchez
   javiergs@asu.edu
   Summer 2017
   Disclaimer. These slides can only be used as study material for the class CSE110 at ASU. They cannot be distributed or used for another purpose.
   

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