📄 mycanvas.java
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// 程序名MyCanvas.java
// 一个简单的Canvas的子类
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class MyCanvas extends Canvas {
private UI_Low4 midlet;
String message ="Test";
public MyCanvas( UI_Low4 midlet ){
this.midlet = midlet;
}
protected void showNotify() {
}
protected void hideNotify() {
}
protected void paint( Graphics g ){
g.setColor(0xffffff);
g.fillRect( 0, 0, getWidth(), getHeight());
g.setColor(0x000000);
g.drawString(message, getWidth()/2, 0,g.TOP | g.HCENTER );
}
protected void keyPressed( int keyCode ){
message = "key "+getKeyName(keyCode)+" pressed.";
repaint();
System.out.println(message);
}
}
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