[英]How to fix this VarArgs build error?
Here's the main method: 这是主要方法:
package main;
import varArgs.VarArgs;
public class Main {
public static void main(String[] args) {
int answer;
answer = VarArgs.sum(new int[]{1,2,3});
System.out.println("sum of ints = " + answer);
answer = VarArgs.sum(new int[]{1,2,3}, new int[] {100, 200, 300});
System.out.println("sum of ints = " + answer);
}
}
Here's the var args method: 这是var args方法:
package varArgs;
public class VarArgs {
/***
* Add an array of integers
* @param numbers Some array of integers
* @return The sum of all the elements in num
*/
public static int sum(int... numbers) {
int result = 0;
for (int i : numbers) {
result += i;
}
return result;
}
}
A varargs parameter can only accept a single array. varargs参数只能接受一个数组。 If you want to pass in a variable number of arrays, you need to do this:
如果要传递可变数量的数组,则需要执行以下操作:
public static int sum(int[]... arrays) {
int sum = 0;
for (int[] numbers : arrays) {
for (int i : numbers) {
sum += i;
}
}
return sum;
}
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