大家伙，帮帮忙看看 java.lang.nullpointerexception
public class ScoreManager{
private double[] score;
int count;
double max,min,avg;

public ScoreManager(double...arr){

for(int i=0;i<score.length;i++)
score[i]=0;
}

public void add(double n){
count=0;
for(int i=0;i<score.length;i++){
if(score[i]==0)
score[i]=n;
}
count++;
}


public double getMax(){
max=score[0];
for(int i=0;i<score.length;i++){
if(score[i]>max)
max = score[i];
}
return max;
}


public double getMin(){
min=score[0];
for(int i=0;i<score.length;i++){
if(score[i]<min)
min=score[i];
}
return min;
}


public double getAvg(){
int sum=0;
for(int i=0;i<score.length;i++)
sum+=score[i];
avg = sum/score.length;
return avg;
}
}


import java.util.Scanner;

public class View{
double[] arrays;
ScoreManager sm = new ScoreManager(arrays);
public void Test(){
Scanner scanner = new Scanner(System.in);
System.out.print("输入:");
double input = scanner.nextDouble();
sm.add(input);
System.out.println(sm.getMax());
}


public static void main(String[] args){
View v = new View();
v.Test();
}
}

这个错误怎么改正啊

[解决办法]

Java code

private double[] score; // 数组score要先初始化才能使用: double[] score = new double[100]，像这样  int count;  double max,min,avg;  public ScoreManager(double...arr){      for(int i=0;i<score.length;i++)  score[i]=0;  }
[解决办法]
Java code
private double[] score;  int count;  double max,min,avg;  public ScoreManager(double...arr){  score = new double[arr.length]; // 在这里初始化数组    for(int i=0;i<score.length;i++)  score[i]=0;  }
[解决办法]
把完整的代码贴出来啊
public ScoreManager(double...arr){

那个arr参数是做什么用的？
[解决办法]
private double[] score;
 int count;
 double max,min,avg;

 public ScoreManager(double...arr){
 score = new double[arr.length]; // 在这里初始化数组 
 for(int i=0;i<score.length;i++)
 score[i]=0;
 }

public class View{
 double[] arrays;  // 在这里初始化数组
 ScoreManager sm = new ScoreManager(arrays);