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[英]Why can't I access my custom string prototype from an object method?
[英]Why can't I access my int array values that I made in my main method from another method? (beginner Java coder)
我正在為我的學校項目制作一個簡單的程序,我要求一個列表,然后返回最大值、最小值或平均值。 我在 class 中創建了一個數組,然后在我的主要方法中編輯值,我試圖從我的其他方法中訪問新值,但不能,IDK 為什么。
導入 java.util.Scanner; 導入 java.util.Arrays;
公共 class numbersAreWeird {
private static double[] thing;
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner in = new Scanner(System.in);
print("Hello");
print("What is the length of your set of numbers?");
int whyEven = in.nextInt();
thing = new double[whyEven];
for(int i = 0; i < thing.length; i++)
{
System.out.println("What do you want to place for " + i + " ?");
whyEven = in.nextInt();
thing [i] = whyEven;
}
print("This is your arrray " + Arrays.toString(thing));
print("Do you want to [1] Find the max [2] the min");
print(" [3] find the average");
int tree = in.nextInt();
if(tree == 1)
{
getMax();
}
if(tree == 2)
{
getMin();
}
if(tree == 3)
{
getAve();
}
}
公共 static 字符串 getMax() {
Double max = Double.MIN_VALUE;
for(int i = 0; i < thing.length; i++)
{
if(max<thing[i])
max = thing[i];
}
return ("The Max value of the list is ")+ max;
}
public static String getMin()
{
Double min = Double.MAX_VALUE;
for(int i = 0; i < thing.length; i++)
{
if(min>thing[i])
min = thing[i];
}
return ("The Min value of the list is ") + min;
}
public static String getAve()
{
int total = 0;
int count = 0;
for (int i = 0; i < thing.length; i++)
{
total += thing[i];
count++;
}
return ("The average of the list is ") + total/count;
}
public static void print(String str)
{
System.out.println(str);
}
}// class 結束
我認為您打算打印而不是返回,或者更確切地說,忘記打印返回的值。
您應該像這樣打印返回的值(這涉及較少的代碼修復):
if (tree == 1) {
print(getMax());
}else if (tree == 2) {
print(getMin());
}else if (tree == 3) {
print(getAve());
}
另外,我用 1 個if
和 2 個else if
語句替換了 3 個if
語句。
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