What is a good library for horizontally concatenating text using Java? [closed]

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I have two strings

AAA
AAA
AAA

and

BBB
BBB
BBB

What I'm looking for is a method String concatenateHorizontally(String left, String right, String separator, options...) that I can pass those strings to and receive a String

AAA BBB
AAA BBB
AAA BBB

I do this a lot in Vim (using blockwise visual mode) but couldn't find a library that allows to do it in Java code. I'm aware that for simple examples this is trivial to implement but I was hoping that someone has already solved this in a more generic way (e.g. with options to decide whether to replace or append, to insert at a fixed position or the line end, handling different newline characters, correct Unicode behavior etc.).

Can someone point me to such a library for horizontally concatenating text?

Answer 1

public class Test
{

    public static void main(String[] args)
    {
        System.out.println(concatenateHorizontally("AAA\nBBB\nCCC", "111\n222\n333", "\n", " "));
        System.out.println(concatenateHorizontally("AAA\nBBB", "111\n222\n333", "\n", " "));
        System.out.println(concatenateHorizontally("AAA\nBBB\nCCC", "111\n222", "\n", " "));
    }

    private static String concatenateHorizontally(final String left, final String right, String br, String concat)
    {
        {

            String[] lefts = left.split(br);
            String[] rights = right.split(br);
            int max = Math.max(lefts.length, rights.length);

            StringBuilder sB = new StringBuilder();

            for (int i = 0; i < max; i++)
            {

                if (i < lefts.length)
                    sB.append(lefts[i]).append(concat);

                if (i < rights.length)
                    sB.append(rights[i]);

                sB.append(br);
            }

            return sB.toString();
        }
    }
}

Answer 2

You can split by line returns and append alternately.

No code example because of "Easy Kill".

EDIT :

Implemented because of "Nice":

String concatenateHorizontally(final String left, final String right) {

    String br = "\n";

    String[] lefts = left.split(br);
    String[] rights = right.split(br);

    if(lefts.length!=rights.length)
        throw new UnsupportedOperationException("This is where my time becomes money");

    StringBuilder sB = new StringBuilder();

    for (int i = 0; i < lefts.length; i++) {

        sB.append(lefts[i]);
        sB.append(rights[i]);
        sB.append(br);
    }

    return sB.toString();
}

Answer 3

Try This :

   class m
   {
   public static void main(String[] args) 
   {
   String s="AAA"+"\n"+
            "AAA"+"\n"+
            "AAA"+"\n";
   String s1="BBB"+"\n"+
             "BBB"+"\n"+
             "BBB"+"\n";

  String[] gets=s.split("\n");
  String[] gets1=s1.split("\n");
  String concate="";
  for(int i=0;i<3;i++)
  {
    concate=concate+gets[i]+"\t"+gets1[i]+"\n"; 
   }
  System.out.print(concate);           
 }    
}

output:

     AAA BBB
     AAA BBB
     AAA BBB