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POHow to compare Objects attributes in an ArrayList?
 

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  1. POHow to compare Objects attributes in an ArrayList?
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    <p>I am fairly new to Java and I have exhausted all of my current resources to find an answer. I am wondering if it possible to access an Objects first property to see if it matches a particular integer? </p> <p>For example, I am trying to obtain a Product that is within my Database by searching for it by it's Product ID. Therefore, if I create two products such as, <code>Product ipad = new Product(12345, "iPad", 125.0, DeptCode.COMPUTER);</code> and <code>Product ipod = new Product(12356, "iPod", 125.0, DeptCode.ELECTRONICS);</code> (I have included this Product class below), and add them to an Arraylist such as, <code>List&lt;Product&gt; products = new ArrayList&lt;Product&gt;();</code> how can I loop through this ArrayList in order to find that product by its ID? This is the method I am working on: </p> <pre><code>List&lt;Product&gt; products = new ArrayList&lt;Product&gt;(); @Override public Product getProduct(int productId) { // TODO Auto-generated method stub for(int i=0; i&lt;products.size(); i++){ //if statement would go here //I was trying: if (Product.getId() == productId) { System.out.println(products.get(i)); } return null; }` </code></pre> <p>I know that I can include a conditional statement in the for loop but I cant figure out how to access the getId() method in the Product class to compare it the productId parameter? </p> <pre><code> package productdb; public class Product { private Integer id; private String name; private double price; private DeptCode dept; public Product(String name, double price, DeptCode code) { this(null, name, price, code); } public Product(Integer id, String name, double price, DeptCode code) { this.id = id; this.name = name; this.price = price; this.dept = code; } public String getName() { return name; } public double getPrice() { return price; } public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public DeptCode getDept() { return dept; } public void setDept(DeptCode dept) { this.dept = dept; } public void setName(String name) { this.name = name; } public void setPrice(double price) { this.price = price; } @Override public String toString() { String info = String.format("Product [productId:%d, name: %s, dept: %s, price: %.2f", id, name, dept, price); return info; } } </code></pre> <p>Please let me know </p>
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