public class InterestTable2
1:
2: /**
3: Displays a two-dimensional table showing how
4: interest rates affect bank balances.
5: */
6: public class InterestTable2
7: {
8: public static final int ROWS = 10;
9: public static final int COLUMNS = 6;
10:
11: public static void main(String[] args)
12: {
13: int[][] table = new int[ROWS][COLUMNS];
14: for (int row = 0; row < ROWS; row++)
15: for (int column = 0; column < COLUMNS; column++)
16: table[row][column] =
17: getBalance(1000.00, row + 1, (5 + 0.5 * column));
18:
19: System.out.println("Balances for Various Interest Rates " +
20: "Compounded Annually");
21: System.out.println("(Rounded to Whole Dollar Amounts)");
22: System.out.println( );
23: System.out.println("Years 5.00% 5.50% 6.00% 6.50% 7.00% 7.50%");
24:
25: showTable(table);
26: }
27:
28: /**
29: Precondition: The array anArray has ROWS rows and COLUMNS columns.
30: Postcondition: The array contents are displayed with dollar signs.
31: */
32: public static void showTable(int[][] anArray)
33: {
34: for (int row = 0; row < ROWS; row++)
35: {
36: System.out.print((row + 1) + " ");
37: for (int column = 0; column < COLUMNS; column++)
38: System.out.print("$" + anArray[row][column] + " ");
39: System.out.println( );
40: }
41: }
42:
43: public static int getBalance(double startBalance, int years, double rate)
44: {
45: double runningBalance = startBalance;
46: for (int count = 1; count <= years; count++)
47: runningBalance = runningBalance * (1 + rate / 100);
48:
49: return (int)(Math.round(runningBalance));
50: }
51: }