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Warm up

Warm up. Determine the value stored in each of the following: gradeTable [ 0 ][ 0 ] gradeTable [ 1 ][ 1 ] gradeTable [ 3 ][ 4 ] gradeTable [ 5 ][ 2 ]. More 2-D Arrays. Different Numbers of Cells per Row. Usually you think of a 2D array as a table

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Warm up

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  1. Warm up • Determine the value stored in each of the following: • gradeTable[ 0 ][ 0 ] • gradeTable[ 1 ][ 1 ] • gradeTable[ 3 ][ 4 ] • gradeTable[ 5 ][ 2 ]

  2. More 2-D Arrays

  3. Different Numbers of Cells per Row • Usually you think of a 2D array as a table • Is this possible:int[][] uneven = {{ 1, 9, 4 }, { 0, 2}, { 0, 1, 2, 3, 4 }};

  4. Different Numbers of Cells per Row • You have to think of "arrays of references to 1D arrays.“

  5. Different Numbers of Cells per Row • Determine the value stored in each of the following: • uneven[ 0 ][ 0 ] • uneven[ 1 ][ 1 ] • uneven[ 0 ][ 4 ] • uneven[ 2 ][ 4 ]

  6. Printing a 2D Array // declare and construct a 2D array int[][] uneven = { { 1, 9, 4 }, { 0, 2}, { 0, 1, 2, 3, 4 } }; // print out the array for(int row=0; row < uneven.length; row++) { System.out.print("Row " + row + ": "); for(int col=0; col < uneven[row].length; col++) System.out.print(uneven[row][col] + " "); System.out.println(); }

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