java - Mirroring an array -


i trying mirror array. in other words, if create array looks (the user gives size):

0 2 4 6 7 8 9 10 11 12

after mirroring, should this:

 0 2 4 2 0  8 9 10 9 8

however, doesn't work when make 3 x 5 array or bigger. repeats same number this: 

0 2 4 2 2 8 9 10 8 8

this code far:

import java.util.scanner;  public class mirror { public static void main (string [] args) {      scanner kb = new scanner (system.in);     system.out.println("please enter number of rows: ");     int rows = kb.nextint();      system.out.println("please enter number of columns:");     int columns = kb.nextint();      int [][] mirror = new int [rows][columns];      int sum =0;      (int r = 0; r<mirror.length; r++)     {         (int c = 0; c<mirror[r].length ; c++)         {             mirror[r][c]= sum;              sum= sum+2;         }     }      (int r = 0; r<mirror.length; r++)     {         (int c = 0; c<mirror[r].length ; c++)         {         system.out.print (mirror[r][c]+ " ");         }         system.out.println();      }      int add = 0;     (int r = 0; r<mirror.length; r++)     {         (int c = mirror[r].length/2 +1; c<mirror[r].length ; c++)         {             (int x= 0; x<mirror[r].length/2; x=x++)             {                 mirror[r][c] = mirror [r][x];              }          }     }      system.out.println();      (int r = 0; r<mirror.length; r++)     {         (int c = 0; c<mirror[r].length ; c++)         {         system.out.print (mirror[r][c]+ " ");         }         system.out.println();      } }    }

do guys have ideas on problem is? tried debug can't find problem. sorry , thankyou, beginner.

you doing more loops necessary.

try changing this:

for (int r = 0; r<mirror.length; r++) {     /*for (int c = mirror[r].length/2 +1; c<mirror[r].length ; c++)     {         (int x= 0; x<mirror[r].length/2; x=x++)         {             mirror[r][c] = mirror [r][mirror[r].length/2 +1 -c];          }      }*/      for(int c=0; c<mirror[r].length; c++){         if(c<mirror[r].length/2.0)             mirror[r][mirror[r].length-1-c] = mirror[r][c];     } }

you need 1 loop row, in loop using if (to detect middle), can want.


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