java - 错误数组整数元素总和java

Question

我在这里找不到错误提示:

class Ideone {
public static void main (String[] args) throws java.lang.Exception
{
    twoSum({2,4,7},9);
}
public static int[] twoSum(int[] nums, int target) {
for (int i = 0; i < nums.length; i++) {
    for (int j = i + 1; j < nums.length; j++) {
        if (nums[j] == target - nums[i]) {
            return new int[] { i, j };
        }
    }
}
throw new IllegalArgumentException("No two sum solution");
}
}

错误是:

Main.java:12: error: illegal start of expression
    twoSum({2,4,7},9);
           ^
Main.java:12: error: ';' expected
    twoSum({2,4,7},9);
            ^
Main.java:12: error: illegal start of expression

我认为声明很好，那么如何更改才能使该功能起作用？

Answer 1

{2,4,7}只能用在数组的声明中，如:

int[] arr = {2,4,7};

要将这样的数组作为参数传递给方法，请使用

twoSum(new int[] {2,4,7},9);