public class CompoundInterest {

public static void main(String[] args) {

final double STARTRATE = 10;

final int NRATES = 6;

final int NYEARS = 10;

double[] interestRate = new double[NRATES];

for (int j = 0; j < interestRate.length; j++) {

interestRate[j] = (STARTRATE + j) / 100.0;

}

double[][] balances = new double[NYEARS][NRATES];

for (int j = 0; j < balances[0].length; j++) {

balances[0][j] = 10000;

}

for (int i = 1; i < balances[i].length; i++) {

for (int j = 0; j < balances[i].length; j++) {

double oldBalance = balances[i - 1][j];

double interest = oldBalance * interestRate[j];

balances[i][j] = oldBalance + interest;

}

}

for (int j = 0; j < interestRate.length; j++) {

System.out.printf("%9.0f%%", 100 * interestRate[j]);

}

System.out.println();

/* 这里用到了Java中的for each循环结构，

* 可以理解为增强型的for循环，

* 其使用方法如下：

* for (variable : collection) statement

* 定义一个变量用于暂时寄存集合中的每一个元素，

* 并执行相应的语句（也可以是语句块）。

* collection这一集合表达式必须是一个数组，

* 或者是一个实现了Iterable接口的类对象（比如ArrayList）

*/

for (double[] row : balances) {

for (double b : row) {

System.out.printf("%10.2f", b);

}

System.out.println();

}

}

}