how do you display multiple message to a text area

Question

I want to display multiple messages to the same text area without clearing any of previous messages.

double betAmount=100;
messages.setText("you are betting,$"+betAmount+"\n");
messages.setText("you stand\n");
messages.setText("you hit\n");

you are betting,$100.0 you stand you hit

Answer 1

 messages.setText("you are betting,$"+betAmount+"\n");
 messages.append("you stand\n");
 messages.append("you hit\n");