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PHP开发很长一段时间后,我决定进入Java.在OOP方法和所有这些方面很舒服,我试图在java中开始这一点,但是我已经挂断了将我的arraylist对象传递给for语句,使用Item类方法打印出来.

HelloInvetory.java

package helloInventory;

import java.util.Arrays;

public class HelloInventory {

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

Object InvetoryItems;

Inventory inv = new Inventory();

inv.createItemObj(101, "camera", "Used camera that I bought off of a homeless guy.", 500);

InvetoryItems = inv.getAllInventoryItems();

for(Object item : InvetoryItems){

System.out.println(item.getItemName());

}

System.out.println("Done");

}

}

Inventory.java

package helloInventory;

import java.util.*;

/**

* Tracks and maintains all items within the inventory

* @author levi

*

*/

public class Inventory {

List InventoryItems = new ArrayList();

/*

* create object from Items class

* and insert into Object[] array.

*/

public void createItemObj(int sku, String name, String descriptor, float price) {

Items item = new Items();

item.setSku(sku);

item.setItemName(name);

item.setItemDescription(descriptor);

item.setItemPrice(price);

this.setInventoryItems(item);

}

public Object getAllInventoryItems() {

//return InventoryItems;

return this.InventoryItems.toArray();

}

public void setInventoryItems(Object inventoryItems) {

//InventoryItems.add(inventoryItems);

this.InventoryItems.add(inventoryItems);

}

}

Items.java

package helloInventory;

/**

* Class object to hold each item details

* @author levi

*

*/

public class Items {

int sku;

String itemName;

String itemDescription;

float itemPrice;

public int getSku() {

return sku;

}

public void setSku(int sku) {

this.sku = sku;

}

public String getItemName() {

return itemName;

}

public void setItemName(String itemName) {

this.itemName = itemName;

}

public String getItemDescription() {

return itemDescription;

}

public void setItemDescription(String itemDescription) {

this.itemDescription = itemDescription;

}

public float getItemPrice() {

return itemPrice;

}

public void setItemPrice(float itemPrice) {

this.itemPrice = itemPrice;

}

}

我陷入困境的地方是HelloInventory.java

for(Object item : InvetoryItems){

System.out.println(item.getItemName());

}

IDE(Eclipse)给出了错误“只能迭代数组或java.lang.Iterable的实例”.我需要一些额外的东西,或者我是否在Java中以错误的方式解决这个问题？正确的例子会有所帮助.

最好,

列维