The Java Developers Almanac 1.4


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Home > List of Packages > java.util.regex  [26 examples] > Paragraphs  [2 examples]

e448. Parsing a String into Paragraphs Using a Regular Expression

This example demonstrates how to parse a CharSequence into an array of paragraphs. A paragraph is a contiguous sequence of non-blank lines separated by one or more blank lines. The lines in a paragraph can be terminated with any of the legal line termination character sequences: \r, \r\n, or \n.
    CharSequence inputStr = "a\r\rb"; // Mac
    inputStr = "a\r\n\r\nb";          // Windows
    inputStr = "a\n\nb";              // Unix
    
    String patternStr = "(?<=(\r\n|\r|\n))([ \\t]*$)+";
    
    // Parse the input into paragraphs
    String[] paras = Pattern.compile(patternStr, Pattern.MULTILINE).split(inputStr);
    
    // Get paragraphs
    for (int i=0; i<paras.length; i++) {
        String paragraph = paras[i];
    }

 Related Examples
e447. Reading Paragraphs from a String Using a Regular Expression

See also: Flags    Groups    Lines    Searching and Replacing    Tokenizing   


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