可能有损转换从long到int，JAVA [英] Possible lossy conversion from long to int, JAVA

问题描述

我正在尝试将long值传递给该方法并在那里使用它来创建一个Long Array。但是，
我在创建数组时遇到从long到int可能有损转换错误

I am trying to pass long value to the method and use it there to create a Long Array. However, I am getting "possible lossy conversion from long to int" error while creating an array

long[] array = new long[n];

虽然我没有使用任何整数值。

although I have not used any integers values.

import java.util.Scanner;
import java.util.ArrayList;

public class test{
public static void main(String[] args){
    Scanner input = new Scanner(System.in);
    long n = input.nextLong();

    System.out. although("result is " + n + " is " + testing(n));
}

private static long testing(long n){
    long[] array = new long[n];

    return 0;
  }
}

推荐答案

数组维度只能是 int 类型。编译器期望该类型，但您传入的是 long 类型。您可以将传入的参数类型更改为 int 并进行相应的更改。

Array dimensions can only be int types. The compiler is expecting that type but you are passing in a long type. You could change the argument type being passed in to an int and the make the corresponding changes.

为了完整性，以下是 JLS 中关于变量的说明数组

For completeness, here is what the JLS says about variables in an array

它们由使用非负整数索引值的数组访问表达式引用。

they are referenced by array access expressions that use non-negative integer index values.

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