学步园

本文以例子代码的形式讲述在Java下如何创建一个BufferedImage对象。

技术实现：


导入包：

                                                 

import java.awt.Frame;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.GraphicsConfiguration;

import java.awt.GraphicsDevice;

import java.awt.GraphicsEnvironment;

import java.awt.Transparency;

import java.awt.image.BufferedImage;

                    

实现代码：


public class Test extends Frame{


    /**

    * @param args

    */

    public static void main(String[] args) {

       // TODO Auto-generated method stub

       int width = 100;

       int height = 100;


       // 1.创建一个不带透明色的BufferedImage对象

       BufferedImage bimage = new BufferedImage(width, height,

              BufferedImage.TYPE_INT_RGB);


       // 2.创建一个带透明色的BufferedImage对象

       bimage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);


       // 3.创建一个与屏幕相适应的BufferedImage对象

       GraphicsEnvironment ge = GraphicsEnvironment

              .getLocalGraphicsEnvironment();

       GraphicsDevice gs = ge.getDefaultScreenDevice();

       GraphicsConfiguration gc = gs.getDefaultConfiguration();

       // Create an image that does not support transparency

       bimage = gc.createCompatibleImage(width, height, Transparency.OPAQUE);

       // Create an image that supports transparent pixels

       bimage = gc.createCompatibleImage(width, height, Transparency.BITMASK);

       // Create an image that supports arbitrary levels of transparency

       bimage = gc.createCompatibleImage(width, height,

              Transparency.TRANSLUCENT);

    }


    // 4.当然我们也可以在图形上下文来创建一个BufferedImage对象

    public void paint(Graphics g) {

       Graphics2D g2d = (Graphics2D) g;

       int width = 100;

       int height = 100;


       // Create an image that does not support transparency

       BufferedImage bimage = g2d.getDeviceConfiguration()

              .createCompatibleImage(width, height, Transparency.OPAQUE);


       // Create an image that supports transparent pixels

       bimage = g2d.getDeviceConfiguration().createCompatibleImage(width,

              height, Transparency.BITMASK);


       // Create an image that supports arbitrary levels of transparency

       bimage = g2d.getDeviceConfiguration().createCompatibleImage(width,

              height, Transparency.TRANSLUCENT);

    }

}