java - Display ouput of AVL Tree traversals on multiple lines in JTextArea -

for(int i=0; < list.length; i++) {     system.out.printf(" %2d",list[i]); // formats right justified      if ((i+1)%10==0)     {         system.out.println(); // adds new line after 10 values     } } 

i'm trying display output of avl tree inorder, preorder, , postorder traversals on multiple lines in jtextarea(), preferably 10 numbers line. tried in jtextarea() adding 5 , 10 jtextarea() parameter (jtextarea(5, 10)), doesn't work. if so, how can 'for' loop provided altered accomplish this? thank help.

i think need (efficient) "string aggregating object":

stringbuilder sb = new stringbuilder();//before loop 

(string + string + string ..is considered ineffcient, possible)

in loop, populate sb:

for (int = 0; < list.length; i++) {     sb.append(string.format(" %2d", list[i])); // formats right justified     if ((i + 1) % 10 == 0) {         sb.append(system.lineseparator()); // adds new line (windows or unix like) after 10 values     } } 

(@see stringbuilder, string.format, system.lineseparator)

and after can set text of textarea like:

myjtextarea.settext(sb.tostring());