?? update.java~2~
字號:
package lineupdate;import java.awt.*;import java.awt.event.*;import java.applet.*;public class update extends Applet { boolean flag ; boolean drawing ; Point spoint; Point epoint; boolean isStandalone = false; /**Get a parameter value*/ public String getParameter(String key, String def) { return isStandalone ? System.getProperty(key, def) : (getParameter(key) != null ? getParameter(key) : def); } /**Construct the applet*/ public update() { } /**Initialize the applet*/ public void init() { flag = false; drawing = false; try { jbInit(); } catch(Exception e) { e.printStackTrace(); } } /**Component initialization*/ private void jbInit() throws Exception { this.addMouseListener(new java.awt.event.MouseAdapter() { public void mouseClicked(MouseEvent e) { this_mouseClicked(e); } }); this.addMouseMotionListener(new java.awt.event.MouseMotionAdapter() { public void mouseMoved(MouseEvent e) { this_mouseMoved(e); } }); } /**Get Applet information*/ public String getAppletInfo() { return "Applet Information"; } /**Get parameter info*/ public String[][] getParameterInfo() { return null; } void this_mouseMoved(MouseEvent e) { if (flag){ spoint = new Point(e.getX(),e.getY()); flag = !flag; } else{ epoint = new Point(e.getX(),e.getY()); flag = !flag; } repaint(); } void this_mouseClicked(MouseEvent e) { drawing = true; spoint = new Point(e.getX(),e.getY()); } public void paint(Graphics g){ if(drawing){ g.drawLine(spoint.x,spoint.y,epoint.x,epoint.y); } } }?? 快捷鍵說明
復(fù)制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -