e448. parsing a string into paragraphs using a regular expression.txt

这里面包含了一百多个JAVA源文件

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];
    }