Use graphics to export the picture code of a histogram

Package com.bstd.sys.server;

Import Java.awt.Color;
Import Java.awt.Font;
Import Java.awt.FontMetrics;
Import Java.awt.Graphics;
Import Java.awt.image.BufferedImage;
Import Java.io.File;
Import Java.io.FileOutputStream;
Import java.io.IOException;
Import java.util.Collections;

Import Javax.imageio.ImageIO;
public class EMP {
Private final int histogramwidth = width of 60;//column chart
Private final int histogrampitch = 60;//Column Chart spacing
Private float scaling = scale of 1f;//scaling
private int maxstrwidth = 0; The maximum width required for a string
private static Font mfont = new Font ("Microsoft Jas Blackbody", Font.Bold, 24);
/**
* <pre>
* Parameters B[i] and str[i] must correspond to
* </pre>
*
* @param g
* @param title
* @param v
* @param str
* @param color
* Can be empty
*/
Public BufferedImage Paintplanehistogram (String title, int[] V, string[] str, color[] Color) {
int width = str.length * HISTOGRAMWIDTH+STR.LENGTH*HISTOGRAMPITCH+50;
int width=500;
int height = 500;
Scaling = Calculatescale (v, height);//Calculating the scaling ratio

BufferedImage bufferimage = new BufferedImage (width, height,
BUFFEREDIMAGE.TYPE_INT_RGB);
Graphics g = bufferimage.getgraphics ();
G.setcolor (Color.White);
G.setcolor (new color (240,255,240));//Set Background color
G.fillrect (0, 0, width, height);
G.fillrect (1, 1, width-1, height-1);
FontMetrics metrics = null;
G.setfont (Mfont);
G.setcolor (New Color (100,149,237)); Set the title color
g.DrawString (title, (Bufferimage.getwidth ()-G.getfontmetrics ()
. Stringwidth (title)) >> 1, 30);//Draw title
G.setfont (Mfont);

Metrics = G.getfontmetrics ();

G.setcolor (New Color (100,149,237));

G.drawline (0, ten, height-30); Draw Y Coordinate
G.drawline (height-30, Width, height-30);//Draw x-coordinate

int j = 0;
int colorcount=color.length;

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

if (color! = NULL) {
G.setcolor (Color[j]);//Set foreground color
if (J+1<colorcount) {
j + +;
}else{
j=0;
}
}else{
G.setcolor (color.red);
}

int x = + I
* (Histogrampitch + histogramwidth + (maxstrwidth >> 1));//calculate x-coordinate
int y = height-30-(int) (V[i] * scaling); Calculates the y-coordinate

Proportion of paintings
g.DrawString (V[i] + "mouth", X
-((Metrics.stringwidth (V[i] + "")-Histogramwidth) >> 10),
Y-10); This is the gap between the value and the graph.

Histogram of drawing plane
G.drawrect (x, Y, histogramwidth, (int) (V[i] * scaling));
G.fillrect (x, Y, histogramwidth, (int) (V[i] * scaling));

Draw everything that is represented
g.DrawString (Str[i], X
-((Metrics.stringwidth (Str[i])-histogramwidth) >> 1),
HEIGHT-2);
}

return bufferimage;
}

/**
* Calculate zoom ratio
* @param v
* Height of @param h picture
* @return
*/
Public float Calculatescale (int[] v, int h) {
float scale = 1f;
int max = Integer.min_value;
for (int i=0, len=v.length; i < Len; ++i) {
if (v[i]>h && V[i]>max) {
Max=v[i];
}
}
if (Max > H) {
scale= ((int) (h*1.0f/max*1000)) *1.0f/1000;
}
return scale;
}

public static void Main (string[] args) {
EMP Planehistogram = new EMP ();
Color[] Colorarr=new color[] {new color (132,112,255), new color (100,149,237), new color (255,222,173), New color ( 127,255,0)};
BufferedImage image = Planehistogram.paintplanehistogram ("Color histogram",
New int[]{100,200,300,400}, new string[]{"Evaluation Well", "pre-exploratory exploration", "Production Well", "other"}, Colorarr);
Paintplanehistogram (String title, int[] V, string[] str, color[] Color)
int width = str.length * HISTOGRAMWIDTH+STR.LENGTH*HISTOGRAMPITCH+50;
File output = new file ("E:\\3331.png");
try {
Imageio.write (Image, "png", output);
} catch (IOException e) {
E.printstacktrace ();
}
}

}

Use graphics to export the picture code of a histogram