Use Java. Given main() and the Instrument class, define a derived class, StringInstrument, for string instruments. Ex. If the input is: Drums Zildjian 2015 2500 Guitar Gibson 2002 1200 6 19 the output is: Instrument Information: Name: Drums Manufacturer: Zildjian Year built: 2015 Cost: 2500 Instrument Information: Name: Guitar Manufacturer: Gibson Year built: 2002 Cost: 1200 Number of strings: 6 Number of frets: 19 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/* }
OOPs
In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career.
Constructor
The easiest way to think of a constructor in object-oriented programming (OOP) languages is:
8.7 LAB: Instrument information (derived classes)
Given main() and the Instrument class, define a derived class, StringInstrument, for string instruments.
Ex. If the input is:
Drumsthe output is:
Instrument Information: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/*
}
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