www.pudn.com > ParseAna.rar > Error.java

/** 
 * this class handle the error problem 
 * @author:贺静 
 * @version :1.2 
 */ 
 
import java.io.IOException; 
 
public class Error { 
	public String getError(int errorCon) throws IOException { 
		String s = ""; 
		switch (errorCon) { 
		// case -1 to -4 is the parse error 
		case -1: 
			s = " 程序必须以 'class' 开始 \n"; 
			break; 
		case -2: 
			s = " 程序体必须以 '{' 开始 \n "; 
			break; 
		case -3: 
			s = " 'Class' 只能是程序开始标识符 \n"; 
			break; 
		case -4: 
			s = " unwanted input: the program should already end \n"; 
			break; 
		// case -30 to -35 is the lex error 
		case -30: 
			s = "   注释不匹配" + "\n"; 
			break; 
		case -31: 
			s = "  标识符不能以 '_' 结束" + "\n"; 
			break; 
		case -32: 
			s = "'" + "'  标识符不能以数字开头" + "\n"; 
			break; 
		case -33: 
			s = "'" + "'   数字不能以 '.' 结束" + "\n"; 
			break; 
		case -34: 
			s = "   invalid input " + "\n"; 
			break; 
		case -35: 
			s = "  数字的输入格式错误" + "\n"; 
			break; 
		default: 
			break; 
		} 
		return s; 
	} 
}