gradeTable[ 0 ][ 0 ] | 99 |

gradeTable[ 1 ][ 1 ] | 91 |

gradeTable[ 3 ][ 4 ] | 93 |

gradeTable[ 5 ][ 2 ] | 92 |

Student | Week | ||||
---|---|---|---|---|---|

0 | 1 | 2 | 3 | 4 | |

0 | 99 | 42 | 74 | 83 | 100 |

1 | 90 | 91 | 72 | 88 | 95 |

2 | 88 | 61 | 74 | 89 | 96 |

3 | 61 | 89 | 82 | 98 | 93 |

4 | 93 | 73 | 75 | 78 | 99 |

5 | 50 | 65 | 92 | 87 | 94 |

6 | 43 | 98 | 78 | 56 | 99 |

In Java, a table may be implemented as a 2D array. Each cell of the array is a variable that can hold a value and works like any variable. As with one dimensional arrays, every cell in a 2D array is of the same type. The type can be a primitive type or an object reference type.

Important:Each cell of the array is specified with arowandcolumnnumber, in that order.

Say that `gradeTable`

is a 2D array of `int`

,
and that (conceptually, at least) it looks like the table to the right.
Then,

gradeTable[ 0 ][ 1 ] // holds 42 gradeTable[ 3 ][ 4 ] // holds 93 gradeTable[ 6 ][ 2 ] // holds 78

The subscripted variables are used in assignment statements and arithmetic expressions just like any variable:

gradeTable[ 0 ][ 1 ] = 33 ; // puts a 33 into row 0 column 1. gradeTable[ 3 ][ 4 ]++ ; // increments the value at row 3 column 4. int value = (gradeTable[ 6 ][ 2 ] + 2) / 2 ; // puts 40 into value

Write a Java statement that puts a zero into row 5 column 3.