[英]How to add an array to store items?
I am new to java and am writing a program for class that I have to modify so that it can handle multiple items and I need to use an array to store the items. 我是java的新手,正在为我的类编写程序,我必须对其进行修改,以便它可以处理多个项目,并且我需要使用数组来存储项目。 This is what I have so far.
到目前为止,这就是我所拥有的。
public class ProductDVD
{
private String productName;
private int productID;
private long unitsInStock;
private float unitPrice;
public void setName( String productName )
{
this.productName = productName;
}
public void setProductID( int productID )
{
this.productID = productID;
}
public void setUnitsInStock( long unitsInStock )
{
this.unitsInStock = unitsInStock;
}
public void setUnitPrice( float unitPrice )
{
this.unitPrice = unitPrice;
}
public String getName()
{
return productName;
}
public int getProductID()
{
return productID;
}
public long getUnitsInStock()
{
return unitsInStock;
}
public float getUnitPrice()
{
return unitPrice;
}
public float getInventoryValue()
{
return( unitsInStock * unitPrice );
}
}
import java.util.Scanner;
public class DVDinventory
{
public static void main( String args [] )
{
Scanner input = new Scanner( System.in );
ProductDVD dvd = new ProductDVD();
System.out.print( "Enter a DVD Title: " );
dvd.setName( input.nextLine() );
System.out.print( "Enter the Product ID: " );
dvd.setProductID( input.nextInt());
System.out.print( "Enter the Product's Unit Price: " );
dvd.setUnitPrice( input.nextFloat() );
System.out.print( "Enter the Number of Units in Stock: " );
dvd.setUnitsInStock( input.nextLong() );
input.nextLine();
System.out.println( "Name: " + dvd.getName() );
System.out.println( "ID: " + dvd.getProductID() );
System.out.println( "Unit Price: " + dvd.getUnitPrice() );
System.out.println( "Units in Stock: " + dvd.getUnitsInStock() );
System.out.println( "Inventory Value: " + dvd.getInventoryValue() );
}
}
The question is how do I create an array that can hold both string and int elements? 问题是如何创建既可以容纳字符串元素又可以容纳int元素的数组? I need the array to hold the DVD name, id, unit price, units in stock, and total inventory value.
我需要一个阵列来保存DVD名称,id,单价,库存单位和总库存值。
Using a java.util.Collection would make more sense, but if you HAVE to use an array for your homework: 使用java.util.Collection会更有意义,但是如果您必须使用数组进行作业:
private static int INVENTORY_SIZE = 42; //that's what you mean by total inventory value, right?
ProductDVD[] dvds = new ProductDVD[INVENTORY_SIZE];
Scanner input = new Scanner( System.in );
for (int i = 0; i < INVENTORY_SIZE; i++) {
dvds[i] = new ProductDVD();
//your code to read in data here...
}
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