8.7 LAB: Instrument information (derived classes) Use Java. Given main() and the Instrument class, define a derived class, StringInstrument, for string instruments. Ex. If the input is: Drums Zildjian...

Given main() and the Instrument class, define a derived class, StringInstrument, for string instruments.

Ex. If the input is:

the output is:

import java.util.Scanner;

public class InstrumentInformation {
public static void main(String[] args) {
Scanner scnr = new Scanner(System.in);

Instrument myInstrument = new Instrument();
StringInstrument myStringInstrument = new StringInstrument();

String instrumentName, manufacturerName, stringInstrumentName, stringManufacturer;
int yearBuilt, cost, stringYearBuilt, stringCost, numStrings, numFrets;

instrumentName = scnr.nextLine();
manufacturerName = scnr.nextLine();
yearBuilt = scnr.nextInt();
scnr.nextLine();
cost = scnr.nextInt();
scnr.nextLine();
stringInstrumentName = scnr.nextLine();
stringManufacturer = scnr.nextLine();
stringYearBuilt = scnr.nextInt();
stringCost = scnr.nextInt();
numStrings = scnr.nextInt();
numFrets = scnr.nextInt();

myInstrument.setName(instrumentName);
myInstrument.setManufacturer(manufacturerName);
myInstrument.setYearBuilt(yearBuilt);
myInstrument.setCost(cost);
myInstrument.printInfo();

myStringInstrument.setName(stringInstrumentName);
myStringInstrument.setManufacturer(stringManufacturer);
myStringInstrument.setYearBuilt(stringYearBuilt);
myStringInstrument.setCost(stringCost);
myStringInstrument.setNumOfStrings(numStrings);
myStringInstrument.setNumOfFrets(numFrets);
myStringInstrument.printInfo();

System.out.println(" Number of strings: " + myStringInstrument.getNumOfStrings());
System.out.println(" Number of frets: " + myStringInstrument.getNumOfFrets());
}
}

public class Instrument {

protected String instrumentName;
protected String instrumentManufacturer;
protected int yearBuilt, cost;

public void setName(String userName) {
instrumentName = userName;
}

public String getName() {
return instrumentName;
}

public void setManufacturer(String userManufacturer) {
instrumentManufacturer = userManufacturer;
}

public String getManufacturer(){
return instrumentManufacturer;
}

public void setYearBuilt(int userYearBuilt) {
yearBuilt = userYearBuilt;
}

public int getYearBuilt() {
return yearBuilt;
}

public void setCost(int userCost) {
cost = userCost;
}

public int getCost() {
return cost;
}

public void printInfo() {
System.out.println("Instrument Information: ");
System.out.println(" Name: " + instrumentName);
System.out.println(" Manufacturer: " + instrumentManufacturer);
System.out.println(" Year built: " + yearBuilt);
System.out.println(" Cost: " + cost);
}

}

// TODO: Define a class: StringInstrument that is derived from the Instrument classpublic class StringInstrument extends Instrument {
// TODO: Declare private fields: numStrings, numFrets

/*answer here/*

// TODO: Define mutator methods -

// setNumOfStrings(), setNumOfFrets()

/*answer here/*

// TODO: Define accessor methods -
// getNumOfStrings(), getNumOfFrets()

/*answer here/*

}