Remove some text between square brackets in Java 6

Question

Would it be possible to change this:

[quote]user1 posted:
      [quote]user2 posted:
              Test1
      [/quote]
      Test2
[/quote]
Test3

to this:

Test3

Using Java 6?

Answer 1

I compiled this to Java 8. I don't believe I'm using any features not available in Java 6.

Edited: System.lineSeparator() was added in Java 1.7. I changed the line to System.getProperty("line.separator").

public class RemoveQuotes {

    public static void main(String[] args) {
        String input = "[quote]user1 posted:\r\n" + 
                "      [quote]user2 posted:\r\n" + 
                "              Test1\r\n" + 
                "      [/quote]\r\n" + 
                "      Test2\r\n" + 
                "[/quote]\r\n" + 
                "Test3";
        
        input = input.replace(System.getProperty("line.separator"), "");
        String endQuote = "[/quote]";
        int endPosition;
        
        do {
            int startPosition = input.indexOf("[quote]");
            endPosition = input.lastIndexOf(endQuote);
            if (endPosition >= 0) {
                String output = input.substring(0, startPosition);
                output += input.substring(endPosition + endQuote.length());
                input = output;
            }
        } while (endPosition >= 0);
        
        System.out.println(input);
    }

}