How to concatenate/combine two attributed strings?

Question

As the title states, how does one concatenate two attributed strings?

The AttributedStrings does not contain the concat method, and of course the short-cut of concat ( + operator on strings) does not work either.

Using ctrl+F to search for "concat" on the AttributedString javadocs... The javadocs don't even mention concat, nor does it appear to mention any means to combine two attributed strings (https://docs.oracle.com/javase/7/docs/api/java/text/AttributedString.html).

---

Specifics on my end desire:

Let's say I have 2 objects each with 2 strings. (Following JSON format)

{
    "term" : "1s",
    "superScript" : "1"
},
{
    "term" : "1s",
    "superScript" : "2"
}

What I need to do is combine all of these terms and superscripts in the following, ordered format:

term+superscript+term+superscript

However, the superScripts must be super scripts (hence my use of AttributedStrings).

Answer 1

Sorry but as far as I know, there is no easy way to do it. You can do something like the following:

AttributedCharacterIterator aci1 = attributedString1.getIterator();
AttributedCharacterIterator aci2 = attributedString2.getIterator();

StringBuilder sb = new StringBuilder();

char ch = aci1.current();
while( ch != CharacterIterator.DONE)
{
    sb.append( ch);
    ch = aci1.next();
}

ch = aci2.current();
while( ch != CharacterIterator.DONE)
{
    sb.append( ch);
    ch = aci2.next();
}

AttributedString combined = new AttributedString( sb.toString());
combined.addAttributes( aci1.getAttributes(), 0, aci1.getEndIndex());
combined.addAttributes( aci2.getAttributes(), aci1.getEndIndex(), aci1.getEndIndex() + aci2.getEndIndex());