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Editorial Team
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Asked: 2026-05-25T15:26:06+00:00

To develop a Java Code Parser, I want to extract method contents of a

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To develop a Java Code Parser, I want to extract method contents of a java source file as strings. But the problem is I can’t match the content from Regex by getting value between { and } because some methods has { and } inside the method. Like this,

   public String[] getArgs() {

       try{
          //something
       }
       catch(Exception e){

       }
     return args;
   }

If I use regex like 

Regex regex = new Regex("(?<={).*?(?=})");

It only captures try{ //something

How can i ignore occurences of { and } inside method and get value inside method like 

try{
      //something
   }
   catch(Exception e){

   }
 return args;
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1 Answer

  1. Editorial Team

    Try the following regex on C#-like text.
    It will capture every method body, taking nested {} into account.
    For explanations : http://www.codeproject.com/KB/recipes/Nested_RegEx_explained.aspx 

    var reg = @"
(?<body>
\{(?<DEPTH>)
(?>
(?<DEPTH>)\{
    |
\}(?<-DEPTH>)  
    |
(?(DEPTH)[^\{\}]* | )
)*
\}(?<-DEPTH>)
(?(DEPTH)(?!))
)";
        var input = "abc{d{e}f}gh{i}";
        foreach (Match m in Regex.Matches(input,reg, RegexOptions.IgnorePatternWhitespace)) Console.WriteLine(m.Groups["body"].Value);

    [edit]
    Sorry, I forgot the “RegexOptions.IgnorePatternWhitespace”

    This sample is writing to console :

    {d{e}f}

    {i}

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