MAXVALUE 2D ArrayList中的Java

Question

我：

ArrayList<List<Integer>> group = new ArrayList<List<Integer>>(); 
group.add(Arrays.asList(1, 2, 3)); 
group.add(Arrays.asList(4, 5, 6)); 
group.add(Arrays.asList(7, 8, 9)); 

如何找到在列最大值第一，第二，第三和第一排，第二，第三？

這是我已經試過：

int aMaxR1, aMaxR2, aMaxR3; 
int aMinC1, aMinC2, aMinC3; 

aMaxR1 = Collections.min(group.get(here could be first row)); 
aMaxR2 = Collections.min(group.get(here could be second row)); 
aMaxR3 = Collections.min(group.get(here could be third row)); 

aMaxC1 = Collections.max(group.get(here could be first column)); 
aMaxC2 = Collections.max(group.get(here could be second column)); 
aMaxC3 = Collections.max(group.get(here could be third column)); 

Answer 1

要獲得行中的最大，這是很容易的，你是在正確的道路。

aMaxR1 = Collections.max(group.get(0)); 

對於列，你可以循環做：

for(int i = 0; i < group.size(); i++){ 
    System.out.println(Math.max(Math.max(group.get(0).get(i), group.get(1).get(i)), group.get(2).get(i))); 
    } 

輸出：

7 
8 
9