SJSU/Udacity CS046

Problem Set 8

  1. 2D Arrays
  2. Print 2D
  3. Fill 2D
  4. Class Design
  5. Static Method
  6. Manipulating Pictures
  7. Window Glass
  8. Robot

2D Arrays

Complete the code to declare and instantiate a two dimensional array of ints with 4 rows and 5 columns 
int[][] numbers = _________________ ;
 new int[4][5]
You have a two dimensional array of ints called matrix. Write a single line of code to put 10 in the first column of the first row. matrix[0][0] = 10;
You have a two dimensional array of 5 x 10 ints called matrix. Write a single line of code to put 54 in the last column of the last row. matrix[4][9] = 54;
You have a two dimensional array of ints called matrix with an unknown number of rows and columns. Complete the statement to find the number of rows in the array. 
int rows = _____________;
 matrix.length
You have a two dimensional array of ints called matrix with an unknown number of rows and columns. Complete the statement to find the number of columns in the array. 
int columns = _____________;
 matrix[0].length
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