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Answer to Question #59511 in Java | JSP | JSF for Peter

Question #59511
Declares and create an array of 5 instances of Vehicle, two of which should be Dumpers, two of which should be Excavators and the other should be a Telehandler.

Dumper, Excavator and Telehandler are subclasses of Vehicle.
Expert's answer
package com.company;

public class Main {
public static class Vehicle{

public static class Dumpers extends Vehicle{

public static class Excavators extends Vehicle{

public static class Telehandler extends Vehicle{

static int sum(int a, int b) {
int total;
total = a + b;
return total;
public static void main(String[] args) {
Vehicle[] vehicle= {new Dumpers(), new Dumpers(), new Excavators(), new Excavators(), new Telehandler()};

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