In JAVA: For 9 points write the printItem() method for the base class. Without t
ID: 3679195 • Letter: I
Question
In JAVA: For 9 points write the printItem() method for the base class. Without this method no coherent output is obtained. Begin on line 11. Sample output for the working program is below:
Last name: Smith
First and last name: Bill Jones
1// ===== Code from file BaseItem.java =====
2 public class BaseItem {
3 protected String lastName;
4
5 public void setLastName(String providedName) {
6 lastName = providedName;
7 return;
8 }
9
10 // FIXME: Define printItem() method
11
12 /* Your solution goes here */
13
14 }
15 // ===== end =====
16
17 // ===== Code from file DerivedItem.java =====
18 public class DerivedItem extends BaseItem {
19 private String firstName;
20
21 public void setFirstName(String providedName) {
22 firstName = providedName;
23 return;
24 }
25
26 @Override
27 public void printItem() {
28 System.out.print("First and last name: ");
29 System.out.println(firstName + " " + lastName);
30 return;
31 }
32 }
33 // ===== end =====
34
35 // ===== Code from file ItemInventory.java =====
36 import java.util.ArrayList;
37
public class ItemInventory {
39 public static void main (String [] args) {
40 BaseItem baseItemPtr;
41 DerivedItem derivedItemPtr;
42 ArrayList<BaseItem> itemList = new ArrayList<BaseItem>();
43 int i = 0;
44
45 baseItemPtr = new BaseItem();
46 baseItemPtr.setLastName("Smith");
47
48 derivedItemPtr = new DerivedItem();
49 derivedItemPtr.setLastName("Jones");
50 derivedItemPtr.setFirstName("Bill");
51
52 itemList.add(baseItemPtr);
53 itemList.add(derivedItemPtr);
54
for (i = 0; i < itemList.size(); ++i) {
56 itemList.get(i).printItem();
57 }
58
59 return;
60 }
61 }
62 // ===== end =====
Explanation / Answer
// ===== Code from file BaseItem.java =====
public class BaseItem {
protected String lastName;
public void setLastName(String providedName) {
lastName = providedName;
return;
}
// FIXME: Define printItem() method
/* Your solution goes here */
public void printItem() {
// TODO Auto-generated method stub
System.out.println("Last name: "+lastName);
}
}
// ===== end =====
// ===== Code from file DerivedItem.java =====
public class DerivedItem extends BaseItem {
private String firstName;
public void setFirstName(String providedName) {
firstName = providedName;
return;
}
@Override
public void printItem() {
System.out.print("First and last name: ");
System.out.println(firstName + " " + lastName);
return;
}
}
// ===== end =====
// ===== Code from file ItemInventory.java =====
import java.util.ArrayList;
public class ItemInventory {
public static void main (String [] args) {
BaseItem baseItemPtr;
DerivedItem derivedItemPtr;
ArrayList<BaseItem> itemList = new ArrayList<BaseItem>();
int i = 0;
baseItemPtr = new BaseItem();
baseItemPtr.setLastName("Smith");
derivedItemPtr = new DerivedItem();
derivedItemPtr.setLastName("Jones");
derivedItemPtr.setFirstName("Bill");
itemList.add(baseItemPtr);
itemList.add(derivedItemPtr);
for (i = 0; i < itemList.size(); ++i) {
itemList.get(i).printItem();
}
return;
}
}
// ===== end =====
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