Java. Lang. nosuchmethoderror: anlr. Collections. Ast. Getline () Solution

In a project, the anlr component is required to import the antlr-2.7.2.jar from the Lib of struts 2. After running, the following error is prompted:

Java. Lang. nosuchmethoderror: anlr. Collections. Ast. Getline () I

So I guess the AST in version 2.7.2 does not use the Getline method. Please try an anlr of a higher version. Import the antlr-2.7.6.jar from the Lib of hibernate 3, and the above error no longer appears after running. Therefore, the problem occurs because the anlr version is incorrect. The problem is solved, and the cause is also found. How can this problem be proved? In the outline view of Eclipse, we can see that ast of version 2.7.6 has a public abstract Getline () method, but that of version 2.7.2 does not.