java – 如何按字典顺序对二维数组进行排序？

文档中对Arrays.compare的简短描述：

If the two arrays share a common prefix then the lexicographic
comparison is the result of comparing two elements,as if by
Integer.compare(int,int),at an index within the respective arrays
that is the prefix length. Otherwise,one array is a proper prefix of
the other and,lexicographic comparison is the result of comparing the
two array lengths.

鉴于您想要修改源数组,那么使用Arrays.sort应该足够了：

Arrays.sort(source,Arrays::compare);

鉴于你想要一个新的数组作为结果,那么我将采用流方式：

int[][] sorted = Arrays.stream(source)
                       .sorted(Arrays::compare)
                       .toArray(int[][]::new);