Why doesnt this work? constructor undefined

[jimmy dean]

line: 5]
Error: The constructor Stock1(java.lang.String, java.lang.String, double, double) is undefined

 public class Stock1 {
  /** Main method */
  public static void main(String[] args) {
    // Create a circle with radius 5.0
    Stock1 myStock = new Stock1("JAVA", "Sun Microsystems Inc.", 4.5, 4.5);
    System.out.println("The price change percentage from "
      + myStock.previousClosingPrice + " to " + myStock.currentPrice + " is " 
      + getChangePercent());

    // Modify circle radius
    myStock.currentPrice = 4.35;
    System.out.println("The price change percentage from "
      + myStock.previousClosingPrice + " to " + myStock.currentPrice + " is " 
      + getChangePercent());
  }
}

// Define the circle class with two constructors
class Stock1 {
  String symbol;
  String name;
  double previousClosingPrice;
  double currentPrice;

  /** Construct a circle with radius 1 */
  Stock1() {
    symbol = "empty";
    name = "empty";
    previosClosingPrice = 0;
    currentPrice = 0;
  }

  /** Construct a circle with a specified radius */
  Stock1(String newSymbol, String newName, double newPreviousClosingPrice, double newCurrentPrice) {
    symbol = newSymbol;
    name = newName;
    previousClosingPrice = newPreviousClosingPrice;
    currentPrice = newCurrentPrice;
  }

  /** Return the area of this circle */
  double getChangePercent() {
    return (((currentPrice - previousClosingPrice) / previousClosingPrice)*100);
  }
}   

[Carol Murphy]

What would happen if you changed the name of your Stock1 class that defined the constructors to something else, and then created that object in main in your Stock1 class?

[Gary Ba]

Carol, Double posting.

Gary

[Raphael Okochu]

More like this;

  
package demo;

 public class Stock1 {
   /** Main method */
   public static void main(String[] args) {
     // Create a circle with radius 5.0
     Stock myStock = new Stock("JAVA", "Sun Microsystems Inc.", 4.5, 4.5);
       System.out.println("The price change percentage from "
       + myStock.previousClosingPrice + " to " + myStock.currentPrice + " is "
       + myStock.getChangePercent());

     // Modify circle radius
     myStock.currentPrice = 4.35;
     System.out.println("The price change percentage from "
       + myStock.previousClosingPrice + " to " + myStock.currentPrice + " is "
       + myStock.getChangePercent());  
   }
 }

 // Define the circle class with two constructors
 class Stock {
   String symbol;
   String name;
   double previousClosingPrice;
   double currentPrice;

   /** Construct a circle with radius 1 */
   Stock() {
     symbol = "empty";
     name = "empty";
     previousClosingPrice = 0;
     currentPrice = 0;
   }

   /** Construct a circle with a specified radius */
   Stock(String newSymbol, String newName, double newPreviousClosingPrice, double newCurrentPrice) {
     symbol = newSymbol;
     name = newName;
     previousClosingPrice = newPreviousClosingPrice;
     currentPrice = newCurrentPrice;
   }

   /** Return the area of this circle */
   double getChangePercent() {
     return (((currentPrice - previousClosingPrice) / previousClosingPrice)*100);
   }
}
  

[Rob Spoor]

Gary Ba wrote:Carol, Double posting.

Gary

Indeed.

Jimmy, please UseOneThreadPerQuestion. This thread is the same as this one. I'll close the other one, but do read Matthew's post in it.