Slow string concatenation over large input

Question

I\'ve written an n-ary tree ADT which works fine. However, I need to store its serialization in a variable a calling class. eg.

    DomTree a         


        

Answer 1

Don't use string concatenation in loops. It does not scale.

Use StringBuilder, this does not make new objects all the time, like string concatenation..

void print() {
StringBuilder sb = new StringBuilder();
sb.append("hello");
sb.append(" World!");
System.out.println(sb.toString());

}