Compiler Errors With Class Definitions and Clients

Question

Hi there, I need help with some code, here it is.
import java.util.*;
import java.text.*;
public class InvestCalc {
     //declaration of instance variables
     private double interest, principal;
     //default constructor, sets interest and principal to zero
     public InvestCalc() {
          interest = 0.0;
          principal = 0.0;
     //overloaded constructor
     public InvestCalc( double startInterest, double startPrincipal) {
          interest = startInterest;
          principal = startPrincipal;
     //accessor methods for instance variables
     public double getRate() {
          return interest;
     public double getPrincipal() {
          return principal;
     //mutator methods
     public void setRate(double newInterest) {
          interest = newInterest;
     public void setPrincipal(double newPrincipal) {
          principal = newPrincipal;
     //String toString() method
     public String toString() {
          return "Interest Rate: " + percent.format(interest) + ", Principal: " + DOLLAR_FORMAT.format(principal);     
     //futureValue(int year) method
     public double futureValue(int year) {
          double futureValue = Math.pow((1 + interest), year)*principal;
          return futureValue;
     //public static final class variables
     public static final int shortTerm = 5;
     public static final int middleTerm = 10;
     public static final int longTerm = 20;
     //public void display Table() method
     public void displayTable() {
          System.out.println("Year" + "\t" + "Interest Rate" + "\t\t" + "Principal" + "\t\t" + "Future Value");
          System.out.println(shortTerm + "\t" + percent.format(interest) + "\t\t\t" + DOLLAR_FORMAT.format(principal) + "\t\t" + DOLLAR_FORMAT.format(futureValue(shortTerm)));
          System.out.println(middleTerm + "\t" + percent.format(interest) + "\t\t\t" + DOLLAR_FORMAT.format(principal) + "\t\t" + DOLLAR_FORMAT.format(futureValue(middleTerm)));
          System.out.println(longTerm + "\t" + percent.format(interest) + "\t\t\t" + DOLLAR_FORMAT.format(principal) + "\t\t" + DOLLAR_FORMAT.format(futureValue(longTerm)));
     //formatting section
     public static final NumberFormat DOLLAR_FORMAT = NumberFormat.getCurrencyInstance();
     public static final DecimalFormat percent = new DecimalFormat("##0.00%");
import java.util.*;
public class InvestCalcApp {
      * @param args
     public static void main(String[] args) {
          // TODO Auto-generated method stub
          //declare Scanner class and interest, principal vars
          Scanner input = new Scanner(System.in);          
          double interest, principal;     //vars for the interest rate and initial investment
          //instantiate a default object of the InvestCalc class
          InvestCalc value1 = new InvestCalc();
          System.out.println("Default InvestCalc Object");
          System.out.println(value1.toString()+ "\n");
          //query for interest and principal
          System.out.print("Enter an interest rate in decimal format: ");
          interest = input.nextDouble();
          System.out.print("Enter the initial investment value: ");
          principal = input.nextDouble();
          //change object and output
          value1.setRate(interest);
          value1.setPrincipal(principal);
          System.out.println("Updated InvestCalc Object");
          System.out.println(value1.toString());
          //test the futureValue method and the DOLLAR_FORMAT static class variable
          System.out.println("Value after 1 year " + InvestCalc.DOLLAR_FORMAT.format(value1.futureValue(1)) + "\n");     
          value1.displayTable();     
          //query for another interest and principal
          System.out.print("Enter another interest rate in decimal format: ");
          interest = input.nextDouble();
          System.out.print("Enter another initial investment value: ");
          principal = input.nextDouble();
          //instantiate an object of the InvestCalc class
          InvestCalc value2 = new InvestCalc(interest, principal);
          System.out.println("Non-Default InvestCalc Object");
          System.out.println(value2.toString()+ "\n");
          value2.displayTable();
}When I compile InvestCalc.java it compiles; however, when I compile InvestCalcApp.java I receive 5 errors:
InvestCalcApp.java:15: cannot find symbol
symbol : class InvestCalc
location: class InvestCalcApp
                 InvestCalc value1 = new InvestCalc();
InvestCalcApp.java:15: cannot find symbol
symbol : class InvestCalc
location: class InvestCalcApp
                 InvestCalc value1 = new InvestCalc();
InvestCalcApp.java:32: package InvestCalc does not exist
                              System.out.println("Value after 1 year " + InvestCalc.DOLLAR_FORMAT.format(value1.futureValue(1)) + "\n");
InvestCalcApp.java:42: cannot find symbol
symbol : class InvestCalc
location: class InvestCalcApp
                 InvestCalc value2 = new InvestCalc(interest, principal);
InvestCalcApp.java:42: cannot find symbol
symbol : class InvestCalc
location: class InvestCalcApp
                 InvestCalc value2 = new InvestCalc(interest, principal);Sorry if that's a lot of reading, but I need help, I'm new at this and not quite sure what those errors mean. Thanks

Answer 1

The errors mean the compiler can not find the InvestCalc class. The compiler looks for classes using the Classpath. It might work if you use a command likejavac -cp . InvestCalcApp.javaThis command tells javac to look in the current directory for dependent classes.