Question

从最终的ANTLR4参考我已经完成了第一个例子，它已经生成了JAVA目标。在目录C：\ JavaLib中我有antlr-4.5-complete.jar 当我尝试用;

编译它时

javac -classpath C:\JavaLib *.java

它会创建以下错误消息;

helloBaseListener.java:13: error: class HelloBaseListener is public, should be declared in a file named HelloBaseListener.java
public class HelloBaseListener implements HelloListener {
   ^
helloListener.java:9: error: class HelloListener is public, should be declared in a file named HelloListener.java
public interface HelloListener extends ParseTreeListener {
   ^
helloParser.java:12: error: class HelloParser is public, should be declared in a file named HelloParser.java
public class HelloParser extends Parser {
   ^
helloBaseListener.java:3: error: package org.antlr.v4.runtime does not exist
import org.antlr.v4.runtime.ParserRuleContext;
                       ^
helloBaseListener.java:4: error: package org.antlr.v4.runtime.misc does not exist
import org.antlr.v4.runtime.misc.NotNull;
                            ^
helloBaseListener.java:5: error: package org.antlr.v4.runtime.tree does not exist
import org.antlr.v4.runtime.tree.ErrorNode;
....

我做错了什么？

Answer 1

有2个问题。一个是文件必须命名为＆＃34; Hello.g4＆＃34;不是＆＃34; hello.g4＆＃34;因为语法被指定为Hello。第二个是类路径，它需要jar文件的路径和名称，以及当前目录。以下命令有效;

javac -classpath .;C:\JavaLib\antlr-4.5-complete.jar *.java

Answer 2

对于上述查询，请使用冒号分隔符，然后回答是。我通过debian软件包安装并在确定如何设置CLASSPATH之前使用了该命令

javac -classpath /usr/share/java/antlr4-runtime.jar  Expr*.java

在此之前，我遇到了大量编译错误。在我的.bash_profile从未加载的那一刻，在debian上似乎也值得注意，因此我需要将其放入.bashrc

编译样本ANTRL4输出

2 个答案: