Question

HELP!

please code in java:

convert an arraylist of string with 250,000 words into 2d array.

Answer 1

import java.util.*;

public class Convert_AL_TO_Array {

   public static void main(String[] args) {
       int n=250000;//just change the value of n to 250000
ArrayList<String> arrli = new ArrayList<String>(n);
//adding some dummy data in array list of strings
for (int i=1; i<=n; i++)
arrli.add(i+"");
//converting to 2d array
String arr2d[][]=new String[(int)Math.sqrt(n)][(int)Math.sqrt(n)];
for(int i=0;i<(int)Math.sqrt(n);i++)
{for(int j=0;j<(int)Math.sqrt(n);j++)
   {
   arr2d[i][j]=arrli.get(i*(int)Math.sqrt(n)+j);

   }
}
for(int i=0;i<(int)Math.sqrt(n);i++)
{for(int j=0;j<(int)Math.sqrt(n);j++)
   {
   System.out.print(arr2d[i][j]+"\t");
   }System.out.println();
}
   }

}