给定一个数组，求两数之和等于某个值

Posted 2022-02-11 wangzxblog

 public static void main(String[] args) 
        int[] intArr = 1, 3, 5, 8, 9, 12;
        int sum = 10;
        int right = intArr.length - 1;

        for (int i=0; i < intArr.length; ) 
            if (right == i) 
                throw new IllegalArgumentException("未获取到有效取和值");
            
            if (sum == intArr[right] + intArr[i]) 
                System.out.println("left index:" + i + ",left num:" + intArr[i] + "; right index:" + right + ",right num:" + intArr[right]);
                break;
             else if (sum < intArr[right] + intArr[i]) 
                right--;
             else 
                i++;
                continue;