java 2d画图示例分享(用java画图)

Java 2D API通过扩展抽象窗口工具箱（AWT），为Java程序提供了二维图像，文本和图形的功能。这个复杂的渲染包支持线形图像，文本和图形，为富用户界面，复杂绘图程序和图像处理器开发者提供灵活的，功能强大的框架。Java 2D对象出现在一个平面中，称为用户坐标系空间，和设备坐标系空间。当对象在屏幕或打印机中渲染时，用户空间坐标系被转换成设备空间坐标系。

复制代码代码如下:

import java.awt.BasicStroke;

import java.awt.Color;

import java.awt.Graphics2D;

import java.awt.RenderingHints;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.IOException;

import java.util.Iterator;

import java.util.Random;

import javax.imageio.*;

import javax.imageio.stream.ImageOutputStream;

public class test {

public static void main(String[] args) throws IOException {

int width = 800;

int height = 800;

BufferedImage image = new BufferedImage(

width, height, BufferedImage.TYPE_INT_RGB);

Graphics2D g2d = image.createGraphics();

g2d.setColor(Color.white);

g2d.fillRect(0, 0, width, height);

g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,

RenderingHints.VALUE_ANTIALIAS_ON);

Random random = new Random();

int wo = 0;

int ho = 0;

for (int i = 0; i < 10; i++) {

int x = random.nextInt(width);

int y = random.nextInt(height);

g2d.setColor(new Color(random.nextInt(256),

random.nextInt(256), random.nextInt(256)));

g2d.setStroke(new BasicStroke(1));

g2d.drawString("node"+i, x, y);

g2d.drawArc(x, y, 20, 20, 0, 360);

if(i!=0){

g2d.drawLine(wo, ho, x, y);

}

wo = x;

ho = y;

}

g2d.dispose();

ImageWriter writer = null;

ImageTypeSpecifier type =

ImageTypeSpecifier.createFromRenderedImage(image);

Iterator iter = ImageIO.getImageWriters(type, "jpg");

if (iter.hasNext()) {

writer = (ImageWriter)iter.next();

}

if (writer == null) {

return;

}

IIOImage iioImage = new IIOImage(image, null, null);

ImageWriteParam param = writer.getDefaultWriteParam();

param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);

param.setCompressionQuality((float) ((10) / 10.0));

ImageOutputStream outputStream =

ImageIO.createImageOutputStream(new File("C:/test.jpg"));

writer.setOutput(outputStream);

writer.write(null, iioImage, param);

}

}