scan.java~1~

我用java写的词法分析器

package 编译技术;

public class Scan
{
 private int index = 0;
  public char GETBC(char[] sentenceChar) {
    try
    {
      while ( (sentenceChar[this.index]) == ' ')
      {
        this.index++;
      }
      this.index++;
    }
    catch (java.lang.ArrayIndexOutOfBoundsException e)
    {
      return ';'; //表示此行已经结束
    }
    return sentenceChar[index - 1];
  }

  public char GETCHAR(char[] sentenceChar) {
  //next();
  this.index++;
  return sentenceChar[this.index - 1];
}

}