英文:
Merge 3 arrays into a multidimensional array
问题
我有三个单独的数组，我想将它们合并成一个多维数组。
数组3 [1, 1, 2, 4, 1, 2, 1, 1]数组2 [1, 1, 2, 2, 1, 2, 6, 1]数组1 [1, 3, 1, 1, 1, 1, 2, 1]
我想要的输出是，所有数组都位于一个多维数组中，它们都叠放在一起。
最终数组 =
数组3数组2数组1
我该如何实现这个？
英文:
I have three separate arrays that I would like to merge into a multidimensional array
Array 3 [1, 1, 2, 4, 1, 2, 1, 1]Array 2 [1, 1, 2, 2, 1, 2, 6, 1]Array 1 [1, 3, 1, 1, 1, 1, 2, 1]
The output that I would like to have is where all the arrays are in one multidimensional array where they are all stacked on top of each other.
Finial Array =
Array 3Array 2Array 1
How would I go about doing this?
答案1
得分: 1
import java.util.stream.IntStream;public class MultiDimensionalArrayDemo {public static void main(String[] args) {final int ROWS = 3;final int COLUMNS = 10;int array1 [] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9};int array2 [] = { 10, 11, 12, 13, 14, 15, 16, 17, 18, 19};int array3 [] = { 20, 21, 22, 23, 24, 25, 26, 27, 28, 29};int finalArray[][] = new int[ROWS][];finalArray[0] = array1;finalArray[1] = array2;finalArray[2] = array3;System.out.println("Initial bi-dimensional array:");for(int i=0; i<ROWS; i++) {for(int j=0; j<COLUMNS; j++) {System.out.printf("%2d ",finalArray[i][j]);}System.out.println();}for(int i=0; i<ROWS-1; i++) {for(int j=0; j<COLUMNS; j++) {if(finalArray[i][j]==0) {moveColumnUp(IntStream.range(i, ROWS).mapToObj(obj -> finalArray[obj]).toArray(int[][]::new),ROWS-i,j);}}}System.out.println("After transformation:");for(int i=0; i<ROWS; i++) {for(int j=0; j<COLUMNS; j++) {System.out.printf("%2d ",finalArray[i][j]);}System.out.println();}}private static void moveColumnUp(int matrix[][], int numberOfRows, int columnIndex) {int firstRowElement = matrix[0][columnIndex]; // temporarily store first row so it can be placed lastfor(int i=0; i<numberOfRows-1; i++) {matrix[i][columnIndex] = matrix[i+1][columnIndex];}matrix[numberOfRows-1][columnIndex] = firstRowElement;}}
英文:
If I understood your question correctly, you're looking for something like this:
import java.util.stream.IntStream;public class MultiDimensionalArrayDemo {public static void main(String[] args) {final int ROWS = 3;final int COLUMNS = 10;int array1 [] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9};int array2 [] = { 10, 11, 12, 13, 14, 15, 16, 17, 18, 19};int array3 [] = { 20, 21, 22, 23, 24, 25, 26, 27, 28, 29};int finalArray[][] = new int[ROWS][];finalArray[0] = array1;finalArray[1] = array2;finalArray[2] = array3;System.out.println("Initial bi-dimensional array:");for(int i=0; i<ROWS; i++) {for(int j=0; j<COLUMNS; j++) {System.out.printf("%2d ",finalArray[i][j]);}System.out.println();}for(int i=0; i<ROWS-1; i++) {for(int j=0; j<COLUMNS; j++) {if(finalArray[i][j]==0) {moveColumnUp(IntStream.range(i, ROWS).mapToObj(obj -> finalArray[obj]).toArray(int[][]::new),ROWS-i,j);}}}System.out.println("After transformation:");for(int i=0; i<ROWS; i++) {for(int j=0; j<COLUMNS; j++) {System.out.printf("%2d ",finalArray[i][j]);}System.out.println();}}private static void moveColumnUp(int matrix [][], int numberOfRows, int columnIndex) {int firstRowElement = matrix[0][columnIndex]; // temporarily store first row so it can be placed lastfor(int i=0; i<numberOfRows-1; i++) {matrix[i][columnIndex] = matrix[i+1][columnIndex];}matrix[numberOfRows-1][columnIndex] = firstRowElement;}}
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