如何使用Java将两个或多个多维数组合并为单个多维数组

Question

我需要将四个3D数组合并为Java中的单个3D数组，

Object[][][] obj1,obj2,obj3,obj4;
obj1 = new Object[7][8][7];
obj2 = new Object[7][8][7];
obj3 = new Object[7][8][7];
obj4 = new Object[7][8][7];

如上所述，我需要一个

Object[][][] total = Object[28][32][28];
// total = obj1+obj2+obj3+obj4;

Answer 1

Stream数组，将流收集到List，然后转换为数组。像

Object[][][] total = Stream.of(obj1, obj2, obj3, obj4)
        .collect(Collectors.toList()).toArray(new Object[0][0][0]);

Answer 2

我注意到我在流收集之前错过了流的展平。添加“ flatMap”解决了该问题。

data1 = Stream.of(data1, data2).flatMap (a -> Arrays.stream(a)).collect(Collectors.toList()).toArray(new String [0][0]);