栖霞网站定制,wordpress对搜索引擎的可见性,同一个阿里云可以做两个网站吗,郑州百度seo/** Java 绘图相关技术的学习*Graphics类相关技术知识#xff1a;
1.图像的几何变换图像翻转#xff1a;使用另一个重载的drawImage(Image img,int x_1,int y_1,目标矩形的第一坐标int x_2,int y_2,目标矩形的第二坐标int x1,int y1,源矩形的第一坐标int x2,int y2,源矩形的第…/** Java 绘图相关技术的学习*Graphics类相关技术知识
1.图像的几何变换图像翻转使用另一个重载的drawImage(Image img,int x_1,int y_1,目标矩形的第一坐标int x_2,int y_2,目标矩形的第二坐标int x1,int y1,源矩形的第一坐标int x2,int y2,源矩形的第二坐标ImageObserver observer)利用非缩放的图像来呈现缩放的矩形动态执行所需的缩放。图像旋转利用Graphics2D类的rotate()结合Math.toRadians()方法来实现。图像错切:利用Graphics2D类的shear(double x,double y)结合Math.toRadians()方法来实现。*/
package app;import java.awt.*;
import javax.swing.*;
import java.net.*;
import java.awt.event.*;//包含有main函数的类的类名和文件名必须保持一致
public class DigitalImage extends JFrame
{private static final long serialVersionUID 1L;private final int width 500;private final int height 500;private Image img;private int imgW 500;private int imgH 500;private int x10, y10;private int x2 imgW, y2 imgH;private Canvas canvas null;private JMenuBar menuBar null;//图片旋转角度private int m_angle 0;public DigitalImage(){super();init();}private void init(){this.setSize(width, height);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置窗体面板为绘图面板对象canvas new Canvas();this.setContentPane(canvas);this.setTitle(绘图);//获取图片URL url DigitalImage.class.getResource(lena.jpg);img Toolkit.getDefaultToolkit().getImage(url);//创建菜单栏对象menuBar new JMenuBar();this.setJMenuBar(menuBar);//创建菜单JMenu menu new JMenu(几何变换);menuBar.add(menu);//创建菜单项JMenuItem Item1 new JMenuItem(图像旋转);Item1.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){Graphics2D g (Graphics2D) getGraphics();m_angle m_angle15;g.rotate(Math.toRadians(m_angle));//此处画板对象和框架对象存在数据封装在框架里需要操作画板需要传入指针g.drawImage(img, 0, 0, imgW, imgH, canvas); }});menu.add(Item1);//创建菜单JMenu Item2 new JMenu(图像翻转);menu.add(Item2);//翻转方向菜单项JMenuItem childMenu1 new JMenuItem(水平);childMenu1.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){//水平方向上仅更改源矩形和目标矩形的x方向映射关系即x的值。Graphics g getGraphics();x1 Math.abs(x1 - imgW);x2 Math.abs(x2 - imgW);g.drawImage(img,0,0 ,imgW,imgH, x1,y1,x2,y2,canvas);}});JMenuItem childMenu2 new JMenuItem(垂直);childMenu2.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){//垂直方向上仅更改源矩形和目标矩形的y方向映射关系即y的值。Graphics g getGraphics();y1 Math.abs(y1 - imgH);y2 Math.abs(y2 - imgH);g.drawImage(img,0,0 ,imgW,imgH, x1,y1,x2,y2,canvas);}});Item2.add(childMenu1);Item2.add(childMenu2);//错切变换JMenuItem Item3 new JMenuItem(图像错切);Item3.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){Graphics2D g (Graphics2D)getGraphics();g.shear(0.3,0);g.drawImage(img, 0, 0, imgW, imgH, canvas);}});menu.add(Item3);}public static void main(String[] args){new DigitalImage().setVisible(true);}class Canvas extends JPanel{private static final long serialVersionUID 1678373920467727747L;public void paint(Graphics g){super.paint(g);g.drawImage(img, 0,0, width, height, this);}}
}
