Write a program called HistogramGeneration.java that takes the data array, uses it to generate a corresponding histogram array and draws the rectangles.

Answer 1

import java.awt.*;

import javax.swing.*;

public class HistogramGeneration extends JFrame {

private int[] data;

private int[] histogram;

private int max;

public HistogramGeneration(int[] data) {

this.data = data;

generateHistogram();

setTitle("Histogram");

setSize(800, 600);

setVisible(true);

setDefaultCloseOperation(EXIT_ON_CLOSE);

}

private void generateHistogram() {

histogram = new int[10];

max = 0;

for (int i = 0; i < data.length; i++) {

int index = data[i] / 10;

histogram[index]++;

max = Math.max(max, histogram[index]);

}

}

@Override

public void paint(Graphics g) {

super.paint(g);

int width = getWidth() / histogram.length;

for (int i = 0; i < histogram.length; i++) {

int height = histogram[i] * getHeight() / max;

g.drawRect(i * width, getHeight() - height, width, height);

}

}

public static void main(String[] args) {

int[] data = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};

new HistogramGeneration(data);

}

}