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396 Chapter 10 Arrays and ArrayLists
/***************************************************************
*
SortDriver.java
Dean & Dean
This exercises selection sort in class Sort.
***************************************************************/
*
*
*
public class SortDriver
{
public static void main(String[] args)
{
int[] studentIds = {3333, 1234, 2222, 1000};
Sort.sort(studentIds);
for (int i=0; i<studentIds.length; i++)
}
// end SortDriver
}
// end main
{
}
System.out.print(studentIds[i] + " ");
calling the sort method
Figure 10.16 Driver that exercises the sort method in Figure 10.15
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Here’s skeleton code for how you might use the Arrays class’s sort method: import java.util.Arrays;
...
int[] studentIds = {...};
...
Arrays.sort(studentIds);
We recommend that you use this API method for heavy-duty sorting. It’s an overloaded method, so it also works for arrays of other types of primitive variables.
10.9 Two-Dimensional Arrays
Arrays are good for grouping related data together. Up to this point, we’ve grouped the data together using standard one-dimensional arrays. If the related data is organized in a table format, consider using a two- dimensional array. In this section, we describe two-dimensional arrays.
Two-Dimensional Array Syntax
Two-dimensional arrays use the same basic syntax as one-dimensional arrays except for a second pair of square brackets ([]). Each pair of square brackets contains one index. According to standard programming practice, the first index identifies the row and the second index identifies the column position within a row.
