Question

我正在尝试将一个随机数分配给一个对象数组，我试图将它分配给一个名为score的变量。我的主要类代码如下：

import java.util.Random;

public class App {

public static void main(String[] args) {

    Bands[] bands = new Bands[5];        
    bands[0] = new Bands("Joe", "Rick", "Nick", "Dalton", "Doylestown, PA", "RockOn", 4000.50 , "Rock");
    bands[1] = new Bands("Luke", "Bill", "Ian", "Matt", "State College, PA", "Blink182", 3500.50 , "Alternative");
    bands[2] = new Bands("Corey", "Noah", "Jon", "Kaleb", "Philadelphia, PA", "Rise Against", 10000.50 , "Rock");
    bands[3] = new Bands("Jake", "Joey", "Mike", "Mac", "New York, NY", "Thousand Foot Krutch", 2000.50 , "Rock");
    bands[4] = new Bands("Bob", "Jeff", "Dom", "Mark", "King of Prussia, PA", "Skillet", 5500.50 , "Rock");

    int score = compete(score);        
}    
}

然后我的Bands类代码位于下方。我无法让它正常工作：

import java.util.Random;

public class Bands {

private String singerName;
private String guitarName;
private String bassistName;
private String drummerName;
private String Hometown;
private String bandName;
private double income;
private String genre;
private int score;

public Bands(String singerName, String guitarName, String bassistName, String drummerName, String Hometown, String bandName, double income, String genre)
{
    this.singerName = singerName;
    this.guitarName = guitarName;
    this.bassistName = bassistName;
    this.drummerName = drummerName;
    this.bandName = bandName;
    this.Hometown = Hometown;
    this.income = income;
    this.genre = genre;
    this.score = -1;
}

public int compete()
{     
    Random rand = new Random();
    this.score = rand.nextInt(20);

    return score;
}

public String getInfo()
{
    String bandInfo = "Band: " + this.bandName + ", Singer: " + this.singerName + ", Guitarist: " + this.guitarName + ", Bassist: " + this.bassistName + 
                      ", Drummer: " + this.drummerName + ", Hometown: " + this.Hometown + ", Income: " + this.income + ", Genre: " + 
                      this.genre + ", Final Score: " + this.score;

    return bandInfo;
}

Answer 1

问题是＆＃34; int得分＆＃34;代码行

public int compete()

这个compete函数不需要参数，但是你在这个函数中传递一个参数

int score = compete(score);

您也无法声明变量score并将其作为参数传递给一行中的函数。

Answer 2

您的班级Bands有方法竞争不参加任何参数，而在您的主要方法中，您调用的方法是竞争得分：

int score = compete(score);

所以我假设您想要调用另一个类中存在的竞争方法，以便解决此问题，您应该：

在Bands类
创建一个新的Bands对象：
设置分数
调用您的竞争方法

    Bands b = new Bands();
    b.setScore(score);
    int score = b.compete();

或

更改竞争方法以获取属性分数

public int compete(int score){     
    Random rand = new Random();
    this.score = rand.nextInt(20);
    return score;
}

将随机数分配给对象数组

2 个答案: