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  1. class Demo {
  2.     static public void main(String[] args) {
  3.         float[][] pesIAlcada = {
  4.             {2.4f,  3.1f, 3.07f, 3.7f,   2.7f,  2.9f,  3.2f,   3f,   3.6f,  3.1f}, 
  5.             { 19f, 18.7f,   22f,  24f,    17f, 18.5f,   21f,   20f, 18.7f,   22f, 18f}, 
  6.             { 47f,   48f,   49f,  50f,    51f,   52f, 51.5f, 50.5f, 49.5f, 49.1f, 50f}, 
  7.             {101f,  104f,  106f, 107f, 107.5f,  108f,  109f,  110f,  112f,  103f}
  8.         };
  9.  
  10.         int fromRow = 0;     // Start copying at row0 (1st row)
  11.         int toRow = 2;       // Copy until row2 (3rd row) <- not included
  12.                              // This will copy rows 0 and 1 (first two rows)
  13.         float[][] pesNeixement = new float[toRow - fromRow][];
  14.  
  15.         /* Copy the specified rows */
  16.         for (int i = fromRow; i < toRow; i++) {
  17.             pesNeixement[i] = new float[pesIAlcada[i].length];
  18.             System.arraycopy(pesIAlcada[i], 0, pesNeixement[i], 0, 
  19.                              pesIAlcada[i].length);               
  20.         }
  21.  
  22.         /* For illustration ONLY: print the new array */
  23.         System.out.format("'fromRow' = %d%n'toRow'   = %d%n", fromRow, toRow);
  24.         System.out.format("Copied %d rows starting with row at index %d:%n",
  25.                           (toRow - fromRow), fromRow);
  26.         for (int i = 0; i < pesNeixement.length; i++) {
  27.             for (int j = 0; j < pesNeixement[i].length; j++) {
  28.                 System.out.format("%,5.2f ", pesNeixement[i][j]);
  29.             }
  30.             System.out.println();
  31.         }
  32.     }
  33. }
  34.  
Success #stdin #stdout 0.08s 380224KB
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Standard input is empty
stdout
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'fromRow' = 0
'toRow'   = 2
Copied 2 rows starting with row at index 0:
 2.40  3.10  3.07  3.70  2.70  2.90  3.20  3.00  3.60  3.10 
19.00 18.70 22.00 24.00 17.00 18.50 21.00 20.00 18.70 22.00 18.00
https://ideone.com/Nj1v4y
Illustration of answer to http://stackoverflow.com/questions/16506326/how-to-make-a-new-array-from-an-old-array.
language:
Java (HotSpot 12)
created:
12 years ago
visibility:
secret

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