Compiler Errors With Class Definitions and Clients
Hi there, I need help with some code, here it is.
import java.util.*;
import java.text.*;
publicclass InvestCalc{
//declaration of instance variables
privatedouble 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
publicdouble getRate(){
return interest;
}
publicdouble getPrincipal(){
return principal;
}
//mutator methods
publicvoid setRate(double newInterest){
interest = newInterest;
}
publicvoid 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
publicdouble futureValue(int year){
double futureValue = Math.pow((1 + interest), year)*principal;
return futureValue;
}
//public static final class variables
publicstaticfinalint shortTerm = 5;
publicstaticfinalint middleTerm = 10;
publicstaticfinalint longTerm = 20;
//public void display Table() method
publicvoid 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
publicstaticfinal NumberFormat DOLLAR_FORMAT = NumberFormat.getCurrencyInstance();
publicstaticfinal DecimalFormat percent =new DecimalFormat("##0.00%");
}
import java.util.*;
publicclass InvestCalcApp{
/**
* @param args
*/
publicstaticvoid 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
