I just need to create the main method but im not good at calling the methods to do this :generate a random list of 20 cubes (in an array), printing out the list before you sort it, and then printing out the list again after it is sorted using BubbleSort. For an identical list of 20 cubes (copied right after the generation of the array that was given to BubbleSort as an input), show the list before and after the use of the SelectionSort method.

//Cube.java

public class Cube {

public double length; //stores length

public double width; //stores width

public double height; //stores height

//calculate volume of cube & return it

public double calculateVol(){

double vol = length*width*height; //stores volume

return vol;

}

}

//Runner1.java

import java.util.Random;

public class Runner1 {

Cube cube[]; //declaration of variable

Cube newcube[];

//return array of cubes

public Cube[] generateRandom(int size){

cube = new Cube[size];

Random rn = new Random(); //for generation of random number

for(int i=0; i

cube[i] = new Cube();

cube[i].length = rn.nextDouble()*100; //random length

cube[i].width = (rn.nextDouble()*100 + rn.nextDouble()*100)%101; //random width

cube[i].height = rn.nextDouble()*100; //random height

}

return cube;

}

//prints cube's length, height, width and volume.

public void printCubes(){

for(int i=0; i

System.out.print("Cube "+i+": "+"length: "+cube[i].length+" width: "+cube[i].width+" height: "+cube[i].height);

System.out.print(" Volume: "+cube[i].calculateVol()); //print volume of cube

System.out.println();//print new line

}

}

//method to create new array

public void copyArray(){

newcube = new Cube[cube.length];

for(int i=0; i

newcube[i] = new Cube(); //creating object of cube class

newcube[i].length = cube[i].length;

newcube[i].width = cube[i].width;

newcube[i].height = cube[i].height;

}

}

//Bubble sort method

public void bubbleSort(){

System.out.println("Before Bubble Sort: ");

for(int i=0; i

System.out.print("Cube "+i+": "+"length: "+cube[i].length+" width: "+cube[i].width+" height: "+cube[i].height);

System.out.print(" Volume: "+cube[i].calculateVol()); //print volume of cube

System.out.println("");//print double new line

}

System.out.println("");

Cube temp = new Cube();

boolean swapped;

for(int i=0; i

swapped = false;

for(int j=0; j

if(cube[j].calculateVol() > cube[j+1].calculateVol()){ //swapping in element > next element

temp = cube[j];

cube[j].length = cube[j+1].length;

cube[j].height = cube[j+1].height;

cube[j].width = cube[j+1].width;

cube[j+1].length = temp.length;

cube[j+1].height = temp.height;

cube[j+1].width = temp.width;

swapped = true;

}

}

// IF no two elements were swapped by inner loop, then break

if (swapped == false)

break;

}

System.out.println("After Bubble Sorting: ");

for(int i=0; i

System.out.print("Cube "+i+": "+"length: "+cube[i].length+" width: "+cube[i].width+" height: "+cube[i].height);

System.out.print(" Volume: "+cube[i].calculateVol()); //print volume of cube

System.out.println("");//print new line

}

System.out.println("");

}//end of bubble sort

//selection sort method

public void selectionSort(){

System.out.println("Before Selection Sort: ");

for(int i=0; i

System.out.print("Cube "+i+": "+"length: "+newcube[i].length+" width: "+newcube[i].width+" height: "+newcube[i].height);

System.out.print(" Volume: "+newcube[i].calculateVol());

//print volume of cube

System.out.println("");//print new line

}

System.out.println("");

Cube temp = new Cube();

int min_idx; //stores index of cube of min volume

for(int i=0; i

//Find the minimum element in unsorted array

min_idx = i;

for (int j = i+1; j < newcube[i].length; j++)

if (newcube[i].calculateVol() < newcube[min_idx].calculateVol())

min_idx = j;

// Swap the found minimum element with the first element

temp = newcube[min_idx];

newcube[i].length = newcube[min_idx].length;

newcube[i].height = newcube[min_idx].height;

newcube[i].width = newcube[min_idx].width;

newcube[min_idx].length = temp.length;

newcube[min_idx].height = temp.height;

newcube[min_idx].width = temp.width;

}

System.out.println("After Selection Sort: ");

for(int i=0; i

System.out.print("Cube "+i+": "+"length: "+newcube[i].length+" width: "+newcube[i].width+" height: "+newcube[i].height);

System.out.print(" Volume: "+newcube[i].calculateVol()); //print volume of cube

System.out.println("");//print new line

}

System.out.println("");

}//end of selection sort

}