numimgtools.java

来自「本光盘是《J2ME无线移动游戏开发》一书的配套光盘」· Java 代码 · 共 44 行

package ch08;

import javax.microedition.lcdui.*;
import javax.microedition.lcdui.game.*;

/**
 * 字体类
 */

public class NumImgTools {

  //--- 定义变量 ----------------------------------------------------------------
  private Graphics g; // 图象对象
  private Sprite sprite; // 图形对象
  private int width; // 每个字符的宽度

  //--- 构造器 ----------------------------------------------------------------
  public NumImgTools(Graphics g, Image img, int width, int height) {
    this.g = g;
    sprite = new Sprite(img, width, height);
    this.width = width;
  }

  //--- 绘制字符 ----------------------------------------------------------------
  public void drawNum(int num, int x, int y) {
    sprite.setPosition(x, y);
    sprite.setFrame(num);
    sprite.paint(this.g);
  }

  //--- 绘制字符串 --------------------------------------------------------------
  public void drawNums(int num, int x, int y, int bit) {
    String StrNum = String.valueOf(num);
    while (StrNum.length() < bit) {
      StrNum = '0' + StrNum;
    }
    for (int i = 0; i < StrNum.length(); i++) {
      drawNum(Integer.parseInt(String.valueOf(StrNum.charAt(i))), x + width * i,
              y);
    }
  }

}