public class Histogram $\{$

private int$[]$ values;

private int minIndex;

private int maxIndex;

private int maxLength;

$/*$

$*$ constructor for histogram drawing class

$*$ values: the array of integer values to draw

$*$ minIndex: the lowest index in the array for the range to draw

$*$ maxIndex: the highest index in the array for the range to draw

$*$ maxLength: the length of line to draw for the largest value

$*/$

public Histogram$($int$[]$ values, int minIndex, int maxIndex, int maxLength$)\{$

this.values $=$ new int$[$maxIndex $+1]$; $//$ Allocate memory for a copy of the values array

this.minIndex $=$ minIndex;

this.maxIndex $=$ maxIndex;

this.maxLength $=$ maxLength;

$//$ Step $7$: Find the largest number in values array for scaling length of bars

$//$ Step $8$: Copy data from values array to this.values array while scaling to maximum length of bars

$//$ step $10$:

$//$ draw vertical bar graph

$\}$

$\}$

Java Code in all the steps