嗨团队,
我是 Antlr 的新手,我花了 4 天时间尝试学习、安装、运行教程并与我的 IDE 集成。:(
我可以在终端中成功运行这个 [tutorial][1]。我现在的目标是使用 AntlrWorks2 在 Netbeans 中运行相同的教程,我已经从 [Here][2] 蚕食了 Main。
代码可以编译,但是当我运行时,我从 Lexer 的 init 中得到一个“java.lang.ExceptionInInitializerError”。
1:http
://www.antlr.org/wiki/display/ANTLR4/Getting+Started+with+ANTLR+v4
2:http ://www.certpal.com/blogs/2011/01/antlr-tutorial-hello -antlr/ )
语法:
grammar Split;
@header {
package PlayGround.AutoGen;
}
hi : HELLO ID ; // match keyword hello followed by an identifier
ID : [a-z]+ | [A-Z]+; // match lower-case identifiers
WS : [ \t\r\n]+ -> skip ; // skip spaces, tabs, newlines
HELLO : '[H|h]ello';
主要的:
public class MyMain {
public static void main(String args[]) {
new MyMain().MyAttempt();
}
public void MyAttempt() {
try {
String string = "Hello World";
CharStream charStream = new ANTLRInputStream(string);
/*Line 28*/ SplitLexer lex = new SplitLexer(charStream); /*Line 28*/
org.antlr.v4.runtime.CommonTokenStream tokens;
tokens = new org.antlr.v4.runtime.CommonTokenStream(lex);
SplitParser parser = new SplitParser(tokens);
SplitParser.HiContext split = parser.hi();
String toString = split.toString();
System.out.println(toString);
} catch (Exception e) {
e.printStackTrace();
}
}
}
错误:
run:
Exception in thread "main" java.lang.ExceptionInInitializerError
at PlayGround.MyMain.MyAttempt(MyMain.java:28)
at PlayGround.MyMain.main(MyMain.java:21)
Caused by: java.lang.UnsupportedOperationException: java.io.InvalidClassException: org.antlr.v4.runtime.atn.ATN; Could not deserialize ATN with version 2 (expected 3).
at org.antlr.v4.runtime.atn.ATNSimulator.deserialize(ATNSimulator.java:132)
at PlayGround.AutoGen.SplitLexer.<clinit>(SplitLexer.java:78)
... 2 more
Caused by: java.io.InvalidClassException: org.antlr.v4.runtime.atn.ATN; Could not deserialize ATN with version 2 (expected 3).
... 4 more
Java Result: 1
BUILD SUCCESSFUL (total time: 1 second)