dispalypicture.java

该程序是用java创建面板

import java .awt.*;
import java.awt.geom.*;
import java.awt.image.*;
import javax.swing.*;
import javax.swing.JPanel.*;
public class DispalyPicture extends JPanel
{
	private Image img;
	public int w;
	public int h;
	float data = 1.0f/9.0f;
	float[] elements = new float[9];
	public DispalyPicture()
	{
		img = getToolkit().getImage(ClassLoader.getSystemResource("boy.gif"));
		MediaTracker mt = new MediaTracker(this);
		mt.addImage(img,0);
										
		try{
			mt.waitForAll();				//判断图片是否加载完成。
		}catch(Exception e){
			e.printStackTrace();
		}

		w = img.getWidth(this);
		h = img.getHeight(this);
		this.setSize(w+60,h);

		for(int i=0;i<9;i++)
		{
			elements[i] = data;
		}

	}

	public void paintComponent(Graphics g)
	{
		super.paintComponent(g);
		BufferedImage bi = new BufferedImage(w,h,BufferedImage.TYPE_INT_ARGB);
							//创建图象对象大小的图象缓冲区对象。
		Graphics2D big = bi.createGraphics();
		big.drawImage(img,0,0,this); //将图像绘制到缓冲区。
		big.drawRect(w/4,h/4,w/2,h/2);//在图像缓冲区中绘制在矩形。
		BufferedImageOp biop = null;
		AffineTransform at = new AffineTransform();
		BufferedImage bimg = new BufferedImage(w,h,BufferedImage.TYPE_INT_RGB);
		Kernel kernel = new Kernel(3,3,elements);//使用矩阵创建kernel对象。
		ConvolveOp cop = new ConvolveOp(kernel,ConvolveOp.EDGE_NO_OP,null);//实现图像的模糊处理
		cop.filter(bi,bimg);//过滤处理后图像并存于bimg。
		biop = new AffineTransformOp(at,AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
		Graphics2D g2d = (Graphics2D)g;
		g2d.drawImage(bi,30,0,null);//显示图像，即显示图像缓冲区内容。
	}

	public JPanel getPanel()
	{
		return this;
	}
};