ANTLR 4.7 CharStreams.fromFileName（s）未找到

Question

这是一个最小化的测试用例。它应该编译。注释掉的字符串是4.6版本，它可以编译和工作。所以我的构建环境似乎是正确的。

import java.lang.*; 
import java.util.*; 
import java.io.*; 

class xx { 
    public static void main(String[] args) { 
     try { 
      // org.antlr.v4.runtime.ANTLRInputStream input = new 
      //  org.antlr.v4.runtime.ANTLRFileStream("file name here"); // compiles 
      org.antlr.v4.runtime.CharStream input = new 
       org.antlr.v4.runtime.CharStreams.fromFileName("file name here"); 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
    } 
} 

$ javac xx.java 
xx.java:8: error: cannot find symbol 
      org.antlr.v4.runtime.CharStream   input = new org.antlr.v4.runtime.CharStreams.fromFileName("file name here"); 
                           ^
    symbol: class fromFileName 
    location: class CharStreams 
1 error 

我从ANTLR 4.6升级到4.7。其中一个变化是弃用ANTLRInputStream和ANTLRFileStream。那么，什么是（直接从采取的优秀和权威ANTLR 4参考）：

import org.antlr.v4.runtime.*;     // http://www.antlr.org/ 
import org.antlr.v4.runtime.tree.*; 

String f ... 

ANTLRInputStream input = new ANTLRFileStream(f); 

现在是一样的东西：

CharStream   input = new CharStreams.fromFileName(f); 

我已经安装在/ usr/local/lib目录4.7 /我编译我的语法没有任何更改或错误。但是，当我编译生成的Java，我得到：

java -jar /usr/local/lib/antlr-4.7-complete.jar xx.g4 
javac -Xlint:deprecation *.java 
xxasm.java:61: error: cannot find symbol 
       CharStream   input = new CharStreams.fromFileName(f); 
                 ^
    symbol: class fromFileName 
    location: class CharStreams 
1 error 

我的类路径和Java版本是：

CLASSPATH=.:/usr/local/lib/antlr-4.7-complete.jar:/usr/local/lib/jopt-simple-5.0.3.jar:/usr/local/lib/junit-4.12-sources.jar:/usr/local/lib/gson-2.8.1.jar 

javac -version 
javac 1.8.0_131 

OSX 10.12.5 

任何想法？

... 
public static org.antlr.v4.runtime.CharStream fromFileName(java.lang.String) throws java.io.IOException; 

打开-verbose标志：在ANTLR-4.7-complete.jar与javap的期待时，一切都看起来不错

... 
[loading ZipFileIndexFileObject[/usr/local/lib/antlr-4.7-complete.jar(org/antlr/v4/runtime/CharStreams.class)]] 
dwasm.java:61: error: cannot find symbol 
       CharStream   input = new CharStreams.fromFileName(f); 
                 ^
    symbol: class fromFileName 
    location: class CharStreams 

而且，不工作：

CharStream   input = new org.antlr.v4.runtime.CharStreams.fromFileName(f); 

org.antlr.v4.runtime.CharStream input = new 
    org.antlr.v4.runtime.CharStreams.fromFileName("file name goes here"); 

od -c

0004720 t i m e . C h a r S t r e a m s 
0004740 . f r o m F i l e N a m e ( " f 
0004760 i l e  n a m e  h e r e " ) ; 

Answer 1

new CharStreams.fromFileName(f); 

应该只是

CharStreams.fromFileName(f); 

无论出于何种原因，当你犯这种错误的错误消息是可怕的。