CompoundInterest.java

public class CompoundInterest

{

  public static void main(String[]args)

  {

    final int 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)/100.00;

 

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

 

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

      balances[0][j]=10000;

 

    for(int i=1;i<balance.length;i++)

    {

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

      {

        double oldBalance=balance[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();

 

    for(double[]row:balances)

    {

      for(double b:row)

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

 

      System.out.println();

    }

  }

}