使用Java在ANTLR4中绘制解析树 [英] Drawing parse tree in ANTLR4 using Java

问题描述

当我第一次在命令行中尝试使用ANTLR4时，我正在使用grun和gui参数.现在，我正在开发Java应用程序，并且希望在执行Java程序时显示相同的对话框.

I am new to ANTLR4, when I was first trying it out in command line I was using the grun with gui parameter. Now I am developing a Java application and I want to display the same dialog while executing my Java program.

我成功生成了ParseTree，并且可以浏览它.但我也想展示它.我认为它与TreeViewer类有关，但我不知道如何使用它.

I generated the ParseTree successfully, and I can navigate through it. But I want to display it as well. I think it has something to do with TreeViewer class but I couldn't figure out how to use it.

谢谢

推荐答案

TreeViewer是一个Swing组件，因此您应该能够将其添加到其他任何SwingComponent，例如JPanel.

TreeViewer is a Swing Component so you should be able to add it to any other SwingComponent, e.g a JPanel.

要实例化TreeViewer(List<String> rules, Tree tree)，您必须提供:

To instantiate a TreeViewer(List<String> rules, Tree tree) you will have to provide:

• 完整的规则名称列表，您可以在此处使用null，但是使用Parser.getRuleNames()的结果会产生更好的结果
• 一棵树，这是您解析的结果(类似于XXXContext).

• a complete list of rule names, you can use null here, but using the result of Parser.getRuleNames() produces a better result
• a tree, which is the result of your parsing (something like XXXContext).

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