What is emerging as a major business area of innovation that offers a flexible collection of computers on the internet that can
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Complete question is attached as snapshot.
Answer:
This will result in a compilation error.
Here's the inheritance hierarchy:
Meg -> Lois -> Brian -> Stewie
Now Meg has 2 public Fxns, a() and toString().
Lois inherits from Meg and all its public functions as well but, overrides the a() fxn of its super class.
So finally Lois has fxns a(), b() and toString().
Brian extends Lois and inherits all the above listed fxns of Lois, but overrides the b() and toString() fxns.
Stewie extends Brian and inherits all the fxns of Brian, but overrides the a() and toString() fxns.
In the Main driver fxn, we call a() and b() methods of all these classes but, the base class Meg has no b() and it is not extending any class so its not available in its scope.
This results in a compilation error.
Explanation:
Answer:
The full code is added in the comments as per regulations. Continuation of driver.java code from the comments is available on the screenshot
Explanation:
Editable code:
//ListingNode.java
class ListingNode {
private listpro listing11;
private ListingNode nextnode;
public ListingNode(listpro listing11) {
this.listing11 = listing11;
}
public listpro getListing() {
return listing11;
}
public void setListing(listpro listing11) {
this.listing11 = listing11;
}
public ListingNode getnextnode() {
return nextnode;
}
public void setnextnode(ListingNode nextnode) {
this.nextnode = nextnode;
}
}
public class Listlinked {
private ListingNode headnode;
public Listlinked() {
headnode = null;
}
public void insert(listpro listing11) {
ListingNode listingNode = new ListingNode(listing11);
if(headnode == null) {
headnode = listingNode;
} else {
ListingNode tempval = headnode;
while (tempval.getnextnode() != null) {
tempval = tempval.getnextnode();
}
tempval.setnextnode(listingNode);
}
}
public listpro fetch(String name) {
ListingNode tempval = headnode;
while (tempval != null) {
if(tempval.getListing().getNamedata().equalsIgnoreCase(name)) {
return tempval.getListing();
}
tempval = tempval.getnextnode();
}
return null;
}
public boolean delete(String name) {
ListingNode tempval = headnode;
boolean found = false;
if(headnode != null) {
if(headnode.getListing().getNamedata().equalsIgnoreCase(name)) {
headnode = headnode.getnextnode();
found = true;
} else {
while (tempval.getnextnode() != null) {
if (tempval.getnextnode().getListing().getNamedata().equalsIgnoreCase(name)) {
found = true;
tempval.setnextnode(tempval.getnextnode().getnextnode());
break;
}
tempval = tempval.getnextnode();
}
}
}
return found;
}
public void printAll() {
ListingNode tempval = headnode;
while (tempval != null) {
System.out.println(tempval.getListing().toString());
tempval = tempval.getnextnode();
}
}
}
//listpro.java
import javax.swing.*;
public class listpro {
private String Name;
private int ID;
private float grade_point;
public listpro(){
}
public listpro(String Name, int ID, float grade_point){
this.Name = Name;
this.ID = ID;
this.grade_point = grade_point;
}
public String getNamedata() {
return Name;
}
public void setNamedata(String Name) {
this.Name = Name;
}
public int getID() {
return ID;
}
public void setID(int ID) {
this.ID = ID;
}
public float getgrade_point() {
return grade_point;
}
public void setgrade_point(float grade_point) {
this.grade_point = grade_point;
}
public listpro deepCopy(){
listpro clone = new listpro(Name,ID,grade_point);
return clone;
}
public String toString(){
return "Name : " + Name + "\nID :" + ID + "\nGrade points :" + grade_point;
}
public void input(){
Name = JOptionPane.showInputDialog("Enter a Name");
ID = Integer.parseInt(JOptionPane.showInputDialog("Enter an ID"));
grade_point = Float.parseFloat(JOptionPane.showInputDialog("Enter a grade point average"));
}
}
