Question

JAVA

Write a method to copy contents in a two-dimensional array to a one-dimensional array. The method will return this one-dimensional array.

Method is declared as below:

public static double [] copyArray (float [][] m);

TEST METHOD in main().

Answer 1

please find an output screenshot along with the code.

filename : ArrayConversion.java

code :

//our package name starts here
package com.practice.HomeworkLib;
//importing the libraries
import java.util.ArrayList;
//our class starts here
public class ArrayConversion {
   //method starts here
   public static ArrayList<Double> copyArray(float [][] m){
       //defining an arraylist here
       ArrayList<Double> list = new ArrayList<Double>();
       //iterating through 2 dimensional array
       //through rows
       for(int i=0;i<m.length;i++){
           //through columns
           for(int j=0;j<m[i].length;j++){
               //adding into list
               list.add((double) m[i][j]);
              
           }
       }
       //returning the list
       return list;
      
   }
   //main method starts here

   public static void main(String[] args) {
       // TODO Auto-generated method stub
       //initializing the variables
       float[][] arr = new float[3][3];
       float temp = (float) 12.5;
       //iterating through rows
       for(int i=0;i<3;i++){
           //iterating through columns
           for(int j=0;j<3;j++){
               //storing in ana array
               arr[i][j] = temp + (i+j+1);
           }
       }
       //storing result in an arraylist
       ArrayList<Double> list = copyArray(arr);
       //printing the output
       for(int i=0;i<list.size();i++){
           System.out.println("Element in position " + i + " is "+ list.get(i));
       }

   }

}

output screenshot :