?? midlet4.java
字號:
package prj12_1;
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
public class MIDlet4 extends MIDlet {
private MyCanvas mc = new MyCanvas();
private Display dis;
protected void startApp() throws MIDletStateChangeException {
dis = Display.getDisplay(this);
mc.setTitle("MyCanvas");
dis.setCurrent(mc);
}
protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
// TODO Auto-generated method stub
}
protected void pauseApp() {
// TODO Auto-generated method stub
}
class MyCanvas extends Canvas{
public void paint(Graphics g){//參數g負責在畫布上畫圖
g.setColor(200, 100, 20);//各個分量在0-255之間
g.drawString("中國人", 0, 0, Graphics.HCENTER|Graphics.TOP);
Font font = Font.getFont(Font.FACE_SYSTEM,Font.STYLE_BOLD,Font.SIZE_LARGE);
g.setFont(font);
g.drawString("中國人", 100, 0, Graphics.HCENTER|Graphics.TOP);
//得到字符串占據的寬度
System.out.println(font.stringWidth("中國人"));
//得到字符串占據的高度
System.out.println(font.getHeight());
int x = this.getWidth()/2;
int y = this.getHeight()/2 - font.getHeight()/2;
g.drawString("中國人", x, y, Graphics.HCENTER|Graphics.TOP);
}
}
}
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