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what is the way or logic to make code like java Editors do, the make keywords red and other statements black, i want to make the java code for it.any help will be appreciable.

HelpMe
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  • i had tried JTextPane, but failed – HelpMe Jul 04 '13 at 10:16
  • (1) Recognize the keywords, and (2) colour them. (2) is the easy part. – user207421 Jul 04 '13 at 10:41
  • I guess the first step in the whole process starts with understanding [Regular Expressions](http://docs.oracle.com/javase/tutorial/essential/regex/) in a good way. Depending on the string literals, you colour them against their category. – nIcE cOw Jul 04 '13 at 11:02
  • possible duplicate of [Syntax Highlighting: How Does Eclipse Do It So Fast?](http://stackoverflow.com/questions/7243409/syntax-highlighting-how-does-eclipse-do-it-so-fast) – Puce Jul 04 '13 at 11:25
  • as the above link conveyed me something, which in turn tells that it is not that much easy as i was thinking, I am still got fumbled while studying AST, but thank you for your answer friend. – HelpMe Jul 05 '13 at 11:20

3 Answers3

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I guess they use an Abstract Syntax Tree.

Puce
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Use JEditorPane. This is excellent tools to make your keyword color as well as HTML tags.

Masudul
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You need a component which shows HTML string. Some strings, which you consider "java keywords" are taking "blue keyword css style" and others ( static variables) bold style and so on. A long ways to do it, start with an open-source IDE and see it.