Thread: Array help

Hi, i am having trouble getting the following String array to run correctly and having compile error. My compile error is posted below.



stapler.java:94: error: cannot find symbol
System.out.println("Product name: " +stapler.getnames[0]);
^
symbol: variable getnames
location: variable stapler of type Stapler
stapler.java:105: error: cannot find symbol
System.out.println("Product name: " +stapler1.getnames[1]);
^
symbol: variable getnames
location: variable stapler1 of type Stapler
stapler.java:116: error: cannot find symbol
System.out.println("Product name: " +stapler2.getnames[2]);
^
symbol: variable getnames
location: variable stapler2 of type Stapler
3 errors

 
 
public class Stapler {
 
		String[] name;
		int numberItem;
		double inStock;
		double price;
 
 
		int numberItem1;
		double inStock1;
		double price1;
 
 
		int numberItem2;
		double inStock2;
		double price2;
 
			public String[] getnames(){
			return(name);
			}
				public int getItemnumber(){
				return(numberItem);
				}
					public double getprices(){
					return(price);
					}
						public double getunits(){
						return(inStock);
						}	
							public double getVolume() {
							return (inStock * price);
							}
 
				public int getItemnumber1(){
				return(numberItem1);
				}
					public double getprices1(){
					return(price1);
					}
						public double getunits1(){
						return(inStock1);
						}	
							public double getVolume1() {
							return (inStock1 * price1);
							}
 
 
 
				public int getItemnumber2(){
				return(numberItem2);
				}
					public double getprices2(){
					return(price2);
					}
						public double getunits2(){
						return(inStock2);
						}	
							public double getVolume2() {
							return (inStock2 * price2);
							}			
 
 
	Stapler(){
		String[] name = {"Miller's Stapler", "Miller's Staples", "Miller's Paper"};
		numberItem = 123456;
		inStock = 123;
		price = 4.75;
 
 
		numberItem1 = 654321;
		inStock1 = 321;
		price1 = 2.50;
 
 
 
		numberItem2 = 987654;
		inStock2 = 987;
		price2 = 1.37;
		}
 
 
 
	public static void main(String[] args) {
		Stapler stapler, stapler1, stapler2;
 
			stapler = new Stapler();
 
			stapler1 = new Stapler();
 
			stapler2 = new Stapler();
 
	System.out.println("Product name: " +stapler.getnames[0]);
 
	System.out.println("Product Number: "+stapler.getItemnumber());
 
	System.out.println("Price of one product: "+stapler.getprices());
 
	System.out.println("Number of units in stock: "+stapler.getunits());	
 
	System.out.println("Total value of Staplers is: "+stapler.getVolume());
	System.out.println();
	//
	System.out.println("Product name: " +stapler1.getnames[1]);
 
	System.out.println("Product Number: "+stapler1.getItemnumber1());
 
	System.out.println("Price of one product: "+stapler1.getprices1());
 
	System.out.println("Number of units in stock: "+stapler1.getunits1());	
 
	System.out.println("Total value of Staplers is: "+stapler1.getVolume1());
	System.out.println();
	//
	System.out.println("Product name: " +stapler2.getnames[2]);
 
	System.out.println("Product Number: "+stapler2.getItemnumber2());
 
	System.out.println("Price of one product: "+stapler2.getprices2());
 
	System.out.println("Number of units in stock: "+stapler2.getunits2());	
 
	System.out.println("Total value of Staplers is: "+stapler2.getVolume2());
	System.out.println();
	}
}

Hi,

Could you please see the below syntax.

System.out.println("Product name: " +stapler.getnames()[0]);

Regards
Lakshmi M

This is my new code:

 
public class Stapler {
 
		String[] name;
		int[] numberItem;
		double[] inStock;
		double[] price;
 
 
			public String[] getnames(){
			return(name);
			}
				public int[] getItemnumber(){
				return(numberItem);
				}
					public double[] getprices(){
					return(price);
					}
						public double[] getunits(){
						return(inStock);
						}	
							public double getVolume() {
							return (inStock[0] * price[0]);
							}
 
 
 
 
							public double getVolume1() {
							return (inStock[1] * price[1]);
							}
 
 
							public double getVolume2() {
							return (inStock[2] * price[2]);
							}	
 
			public double getTotal() {
			return (price[2]*inStock[2]+price[1]*inStock[1]+price[0]*inStock[0]);
			}
 
 
	Stapler(){
		String[] name = {"Miller's Stapler", "Miller's Staples", "Miller's Paper"};
		int[] numberItem = {123456, 654321, 987654};
		int[] inStock = {123, 321, 987};
		double[] price = {4.75, 2.50, 1.37};
 
		}
 
 
 
	public static void main(String[] args) {
		Stapler stapler, stapler1, stapler2;
 
			stapler = new Stapler();
 
			stapler1 = new Stapler();
 
			stapler2 = new Stapler();
 
 
 
 
	System.out.println("Product name: " +stapler.getnames()[0]);
 
	System.out.println("Product Number: " +stapler.getItemnumber()[0]);
 
	System.out.println("Price of one product: "+stapler.getprices()[0]);
 
	System.out.println("Number of units in stock: "+stapler.getunits()[0]);	
 
	System.out.println("Total value of Staplers is: "+stapler.getVolume());
	System.out.println();
	//
	System.out.println("Product name: " +stapler1.getnames()[1]);
 
	System.out.println("Product Number: "+stapler1.getItemnumber()[1]);
 
	System.out.println("Price of one product: "+stapler1.getprices()[1]);
 
	System.out.println("Number of units in stock: "+stapler1.getunits()[1]);	
 
	System.out.println("Total value of Staplers is: "+stapler1.getVolume1());
	System.out.println();
	//
	System.out.println("Product name: " +stapler2.getnames()[2]);
 
	System.out.println("Product Number: "+stapler2.getItemnumber()[2]);
 
	System.out.println("Price of one product: "+stapler2.getprices()[2]);
 
	System.out.println("Number of units in stock: "+stapler2.getunits()[2]);	
 
	System.out.println("Total value of Staplers is: "+stapler2.getVolume2());
	System.out.println();
 
	System.out.println("Total value of all inventory is: "+stapler.getTotal());
 
	}
}

I get this error when i run it:
Exception in thread "main" java.lang.NullPointerException
at Stapler.main(stapler.java:67)
How do i fix it.

Hi, you are not assigned the values to instance variables in 'no argument constructor'. Please assing the values to instance variable in no argument construcor like

Stapler() {
name = {"Miller's Stapler", "Miller's Staples", "Miller's Paper"}
numberItem = {123456, 654321, 987654};
inStock = {123, 321, 987};
price = {4.75, 2.50, 1.37};
}

The constructor is already assinged those variables. so you pretty much told me to change nothing and it would work. That is not helpful.

I cannot find any variable that could cause it to be a null value. I have checked all the code and nothing is jumping out at me. Could it be wrong placment of code?