创建一个返回随机音符的字符串表示的方法，这些音符具有随机持续时间？

Question

我需要playGuitar 方法来返回一个包含 16 个随机持续时间的随机音符的字符串表示形式。输出应如下所示：A(2), G(3), B(0.5), C(1), C(1), D(0.25), …]。

另外，如何让 Color 数据字段在我的 Guitar Constructor 中显示为 blue 或 red 而不是 RGB 值？

我不想使用数组。

import java.awt.Color;
import java.util.Random;


public class Guitar {
    private int numStrings = 6;
    private double guitarLength = 28.2;
    private String guitarManufacturer = "Gibson";
    private Color guitarColor = Color.red;


    Guitar(){
        int numStrings = 6;
        double guitarLength = 28.2;
        String guitarManufacturer = "Gibson";
        Color guitarColor = Color.red;
    }

    Guitar(int specStrings, double specLength, String specManufacturer, Color specColor){
        numStrings = specStrings;
        guitarLength = specLength;
        guitarManufacturer = specManufacturer;
        guitarColor = specColor;
        //String s1 = Color.toString(specColor);
    }

    public String playGuitar(String str3){
        Random rnd = new Random();

        for (int iCount = 0; iCount<16 ; iCount++){
        char a = (char) (rnd.nextInt(7) + 'A');
        double b = (double) (rnd.nextInt(5)+1);
        String str1 = Double.toString(b);
        String str2 = Character.toString(a);
        //System.out.println(a);
        //System.out.println(str1);
        str3 = str2+"("+str1+")";
        continue;
        //System.out.println(str2+"("+str1+")");
        //System.out.println(str3);
        //String str4 = String.toString(str3);
        //System.out.println(str4);
            }
        return str3;
    }

    public String toString(){
        return numStrings+" "+guitarLength+" "+guitarManufacturer+" "+guitarColor;
    }
    public int getNumStrings (){
        return numStrings;
    }
    public double getGuitarLength(){
        return guitarLength;
    }
    public String getGuitarManufacturer(){
        return guitarManufacturer;
    }
    public Color getGuitarColor(){

        return guitarColor;
    } 
}

Answer 1

我修复了您的 Guitar 类的问题并运行了 playGuitar 方法的以下测试。我手动格式化输出以适合答案。

F(2.75), G(2.50), G(0.75), A(0.25), D(1.75), G(0.75), 
F(0.50), C(2.75), A(2.50), A(1.00), A(2.25), E(1.50), 
D(2.50), G(1.25), A(0.50), G(1.00)

我所做的主要更改是；

1. 我添加了一个main 方法我可以测试Guitar 类。

2. 我修复了您的空构造函数以使用实例变量。

3. 我将吉他颜色更改为String，因为您想显示“红色”或“蓝色”。Color 类用于使用Graphics 或@987654329 绘制实际颜色@类。

4. 我解决了您的 playGuitar 课程的众多问题。

这是代码。我希望你通过阅读代码学到一些东西。

import java.util.Random;

public class Guitar {
    public static void main(String[] args) {
        Guitar guitar = new Guitar();
        System.out.println(guitar.playGuitar());
    }

    private int numStrings;
    private double guitarLength;
    private String guitarManufacturer;
    private String guitarColor;

    Guitar() {
        numStrings = 6;
        guitarLength = 28.2;
        guitarManufacturer = "Gibson";
        guitarColor = "red";
    }

    Guitar(int specStrings, double specLength,
            String specManufacturer, String specColor) {
        numStrings = specStrings;
        guitarLength = specLength;
        guitarManufacturer = specManufacturer;
        guitarColor = specColor;
    }

    public String playGuitar() {
        Random rnd = new Random();
        String str3 = "";

        for (int iCount = 0; iCount < 16; iCount++) {
            char a = (char) (rnd.nextInt(7) + 'A');
            double b = 0.25d * (rnd.nextInt(11) + 1);
            String str1 = String.format("%.2f", b);
            String str2 = Character.toString(a);
            str3 += str2 + "(" + str1 + ")";
            if (iCount < 15) {
                str3 += ", ";
            }
        }

        return str3;
    }

    @Override
    public String toString() {
        return numStrings + " " + guitarLength + " " +
                guitarManufacturer + " " + guitarColor;
    }

    public int getNumStrings() {
        return numStrings;
    }

    public double getGuitarLength() {
        return guitarLength;
    }

    public String getGuitarManufacturer() {
        return guitarManufacturer;
    }

    public String getGuitarColor() {
        return guitarColor;
    }

}