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

问题描述

我是 ANTLR4 的新手，当我第一次在命令行中尝试它时，我使用的是带有 gui 参数的 grun.现在我正在开发一个 Java 应用程序，我想在执行我的 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，我可以浏览它.但我也想显示它.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，因此您应该能够将它添加到任何其他 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 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，但使用 Parser.getRuleNames() 的结果会产生更好的结果
• 一棵树，它是您解析的结果(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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