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[英]How to Merge two or more multidimensional arrays into single multidimensional array using Java
[英]Merge 3 arrays into a multidimensional array
我有三個單獨的數組,我想將它們合並到一個多維數組中
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]
我想要的輸出是所有數組都在一個多維數組中,它們都堆疊在彼此的頂部。
最終數組 =
Array 3
Array 2
Array 1
我該怎么做呢?
如果我正確理解了您的問題,那么您正在尋找這樣的東西:
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 last
for(int i=0; i<numberOfRows-1; i++) {
matrix[i][columnIndex] = matrix[i+1][columnIndex];
}
matrix[numberOfRows-1][columnIndex] = firstRowElement;
}
}
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