StringInstrument.java // TODO: Define a class: StringInstrument that is derived from the Instrument class public class StringInstrument extends Instrument { // TODO: Declare private fields: numStrings, numFrets // TODO: Define mutator methods - // setNumOfStrings(), setNumOfFrets() // TODO: Define accessor methods - // getNumOfStrings(), getNumOfFrets() }
StringInstrument.java // TODO: Define a class: StringInstrument that is derived from the Instrument class public class StringInstrument extends Instrument { // TODO: Declare private fields: numStrings, numFrets // TODO: Define mutator methods - // setNumOfStrings(), setNumOfFrets() // TODO: Define accessor methods - // getNumOfStrings(), getNumOfFrets() }
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
Instrument.java
public class Instrument {
protectedStringinstrumentName;
protectedStringinstrumentManufacturer;
protectedintyearBuilt, cost;
publicvoidsetName(StringuserName) {
instrumentName = userName;
}
publicStringgetName() {
return instrumentName;
}
publicvoidsetManufacturer(StringuserManufacturer) {
instrumentManufacturer = userManufacturer;
}
publicStringgetManufacturer(){
return instrumentManufacturer;
}
publicvoidsetYearBuilt(intuserYearBuilt) {
yearBuilt = userYearBuilt;
}
publicintgetYearBuilt() {
return yearBuilt;
}
publicvoidsetCost(intuserCost) {
cost = userCost;
}
publicintgetCost() {
return cost;
}
publicvoidprintInfo() {
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);
}
}
StringInstrument.java
// TODO: Define a class: StringInstrument that is derived from the Instrument class
public class StringInstrument extends Instrument {
// TODO: Declare private fields: numStrings, numFrets
// TODO: Define mutator methods -
// setNumOfStrings(), setNumOfFrets()
// TODO: Define accessor methods -
// getNumOfStrings(), getNumOfFrets()
}
InstrumentInformation.java
import java.util.Scanner;
public class InstrumentInformation {
publicstaticvoidmain(String[] args) {
Scannerscnr = newScanner(System.in);
InstrumentmyInstrument = newInstrument();
StringInstrumentmyStringInstrument = newStringInstrument();
StringinstrumentName, manufacturerName, stringInstrumentName, stringManufacturer;
intyearBuilt, 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());
}
}
Transcribed Image Text:Given `main()` and the `Instrument` class, define a derived class, `StringInstrument`, for string instruments.
**Example**: 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
```
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