import java.awt.*; import java.lang.reflect.Field; import java.util.*; public class Guitar { //Private data fields private int numStrings = 6; private double guitarLength = 28.2; private String guitarManufacturer = “Gibson”;
import java.awt.*; import java.lang.reflect.Field; import java.util.*;
public class Guitar {
//Private data fields
private int numStrings = 6;
private double guitarLength = 28.2;
private String guitarManufacturer = “Gibson”;
private Color guitarColor;
//No argument constructor that creates a Guitar using the default parameters
//Public method
public Guitar constructor() {
this.numStrings = 6;
this.guitarLength = 28.2;
this.guitarManufacturer = “Gibson”;
this.guitarColor = Color.red;
return this;
}
//A constructor that creates a Guitar using specified parameters
public Guitar constructor(int strings, double length, String manufacturer, Color color) {
this.numStrings = strings;
this.guitarLength = length;
this.guitarManufacturer = manufacturer;
this.guitarColor = color;
return this;
}
//Getter methods for data fields
public int getNumStrings() {
return this.numStrings;
}
public double getGuitarLength() {
return this.guitarLength;
}
public String getGuitarManufacturer() {
return this.guitarManufacturer;
}
public Color getGuitarColor() {
return this.guitarColor;
}
//playGuitar method to return a string of 16 randomly selected notes and duration
public String playGuitar() {
String play = “[“;
//arrays with possible notes and duration
char[] notes = {‘A’,’B’,’C’,’D’,’E’,’F’,’G’};
double[] duration = {0.25,0.5,1,2,4};
int a;
int b;
//initiate random number
Random rn = new Random();
//for loop for 16 random notes and duration
for (int k=0;k<16;k++) {
a = rn.nextInt(7);
b = rn.nextInt(5);
play = play + notes[a] + “(” + String.valueOf(duration[b]) + “)”;
if (k!=15) play = play + “, “;
}
play = play + ‘]’;
return play;
}
//toString which displays guitar parameters
public String toString() {
String infoString = “(numStrings=”+this.numStrings+”, Length=”+this.guitarLength+”, manufacturer=”+this.guitarManufacturer+”, color=”+colorName(this.guitarColor).orElse(“no name found”) +”)”;
return infoString;
}
//method to get color name
public Optional<String> colorName(Color c) {
for (Field f : Color.class.getDeclaredFields()) {
//test fields of type Color
if (f.getType().equals(Color.class)) try {
if (f.get(null).equals(c)) return Optional.of(f.getName().toLowerCase());
}
catch (IllegalArgumentException | IllegalAccessException e) {
e.printStackTrace();
}
}
return Optional.empty();
}
}
I keep getting compiler error for this saying:
Error: Main method not found in class Guitar, please define the main method as:
public static void main(String[] args)
or a JavaFX application class must extend javafx.application.Application
How do I fix this?
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