j2me编程中drawImage函数使用无法显示图片

Posted 2023-02-28

编译通过，没有抛出异常，代码如下：canvas类：package Graphics;import javax.microedition.lcdui.*;public class Mycanvas extends Canvas private Image image; private int x =this.getWidth(); private int y =this.getHeight(); public Mycanvas()   try   image = Image.createImage("/L.png");           catch(Exception ex)   System.out.println(ex);     public void paint(Graphics g)   //g.setColor(25,25,36);   //g.fillRect(0, 0, x, y);   g.drawImage(image, x,y , Graphics.LEFT|Graphics.TOP);   System.out.println("hehe");     主类package Graphics;import javax.microedition.midlet.MIDlet;import javax.microedition.midlet.MIDletStateChangeException;import javax.microedition.lcdui.*;public class test extends MIDlet  private Display display; private Mycanvas mycanvas; public test()  display = Display.getDisplay(this); mycanvas = new Mycanvas();   protected void startApp() throws MIDletStateChangeException   display.setCurrent(mycanvas);  protected void destroyApp(boolean arg0) throws MIDletStateChangeException     protected void pauseApp()    

private int x =this.getWidth(); //这是屏幕宽度
private int y =this.getHeight()//这是屏幕高。

g.drawImage(image, x,y , Graphics.LEFT|Graphics.TOP);

已经画到了屏幕外边 了！！！ 参考技术A 改为drawImage(image,x,y,0);在试试