hi, all ... very new to java, but plugging along somehow ... however, i have an assignment that wants me to find the value of all of the inventory of a product and i have the entire code, but the method that i created to calculate the value ... calculateTotInvent() can't find the name of my array? i've been at this for more than 5 hours now and my brain is mush. any ideas?
btw i get the "errors" on these two lines
for(int number =0 ; number < arrCam.length(); number++)
{
totValue+= arrCam[number].getIValue();
}and this is the error msg i get when I try to compile:
cannot find symbol
symbol : variable arrCam
location: class Invent2
for(int number =0 ; number < arrCam.length; number++)
^
Invent2.java:116: cannot find symbol
symbol : variable arrCam
location: class Invent2
totValue+= arrCam[number].getIValue();
^
Invent2.java:116: inconvertible types
found : <nulltype>
required: double
totValue+= arrCam[number].getIValue();
^
3 errors
here's the main program
public class Invent2
{
public static final String IDEPT = "Electronics"; // FIXED Variable for camera's department
public static void main(String[] args)
{
System.out.println( ); // One blank line
System.out.println( "____________________________________________________ " ); // Show a long line
System.out.println( ); // One blank line
System.out.println( "Welcome to the input module of the Inventory Program ");
System.out.println( "____________________________________________________ " ); // Show a long line
System.out.println( "Please enter the details of the four models we carry. ");
System.out.println( "You will be prompted 4 times for each of the 4 models ");
// Create an array of Cameras
DigitalCamera arrCam[] = new DigitalCamera[4];
arrCam[0] = getCamera( );
arrCam[1] = getCamera( );
arrCam[2] = getCamera( );
arrCam[3] = getCamera( );
// Display results
System.out.println( ); // One blank Line
System.out.println( "List of Current Inventory" ); // Display welcome line
System.out.println( "________________________________" ); // One long line
System.out.println( ); // One blank Line
for(int number = 0; number < arrCam.length; number++)
{
System.out.println( "Camera Name : " + arrCam[number].getIName() );
System.out.println( "Item number : " + arrCam[number].getINum() );
System.out.println( "Digital resolution : " + arrCam[number].getiRes() );
System.out.println( "Department : " + IDEPT );
System.out.printf( "Unit Price : $%.2f\n", arrCam[number].getIPrice() );
System.out.println( "Units in Stock : " + arrCam[number].getIStock() );
System.out.printf( "Total Value in Stock: $%.2f\n", arrCam[number].getIValue() );
System.out.println();
}
// display total inventory using method calculateTotInvent() developed below
System.out.println( "________________________________" ); // One long line
System.out.println( ); // One blank line
System.out.printf("Value of Entire Inventory: %.2f\n", calculateTotInvent());
System.out.println( "________________________________" ); // One long line
// Show Program Exit Message
System.out.println( ); // One blank line
System.out.println( "Now exiting the program."); // Show Exit Message
System.out.println( ); // One blank line
} // end method main
public static double calculateTotInvent(){
double totValue=0.0;
{
for(int number =0 ; number < arrCam.length(); number++)
{
totValue+= arrCam[number].getIValue();
}
}
return totValue;
}
public static DigitalCamera getCamera( )
{
Scanner input = new Scanner(System.in);
int iNum; // Variable for camera's item number
String iName; // Variable for camera's name
int iStock; // Variable for number of units in stock
float iPrice; // Variable for price of each unit
float iRes; // Variable for Digital subclass
System.out.println( ); // One blank line
System.out.println( ); // One blank line
// First input for camera's name
System.out.print ( "Enter the name of the Camera: " );
iName = input.next();
// Second input for camera's item number
System.out.print( "Enter a Camera's item number: " );
iNum = input.nextInt();
// Third input for resolution of Digital camera
System.out.print( "Enter the resolution of this model: " );
iRes = input.nextFloat();
// Fourth Input for number of cameras in stock
System.out.print( "Enter the number of units in stock: " );
iStock = input.nextInt();
// Fifth input for price of each Camera
System.out.print( "Enter the price of this model: " );
iPrice = input.nextFloat();
// create constructor for this object of Digital Cameras
DigitalCamera myCamera = new DigitalCamera(iName, iNum, IDEPT, iStock, iPrice, iRes);
return myCamera;
}
} // end class Invent2here's my camera class
public class Camera
{
protected int iNum2; // Variable for instance of camera's item number
protected String iName2; // Variable for instance of camera's name
protected int iStock2; // Variable for instance of number of units in stock
protected float iPrice2; // Variable for instance of price of each unit
// constructor to create camera object
public Camera(String iName, int iNum, String IDEPT, int iStock, float iPrice)
{
this.iName2 = iName;
this.iNum2 = iNum;
this.iStock2 = iStock;
this.iPrice2 = iPrice;
}
// Methods to retrieve this info is below
//method to get item Number
public int getINum()
{
return this.iNum2;
}
//method to get item Name
public String getIName()
{
return this.iName2;
}
//method to get Department
public int getIStock()
{
return this.iStock2;
}
// method to get price of each unit
public float getIPrice()
{
return this.iPrice2;
}
float getIValue() {
return iPrice2 * iStock2;
}
} // end class Cameraand here's my extended class
public class DigitalCamera extends Camera
{
protected float iRes;
protected float reStock;
DigitalCamera(String iName2, int iNum2, String IDEPT, int iStock2, float iPrice2, float iRes)
{
super(iName2, iNum2, IDEPT, iStock2, iPrice2);
this.iRes = iRes;
}
public float getiRes()
{
return iRes;
}
public void setDigital(float iRes)
{
this.iRes = iRes;
}
public float getReStock()
{
return reStock;
}
@Override
public float getIValue() {
{
return iPrice2 * iStock2;
}
}
}//class ends