ArrayList to array

// An array:
String[] strs = {"Apfel", "Birne", "Banane", "Pflaume"};
// Array to ArrayList:
ArrayList<String> al = new ArrayList<String>();
for (int i=0; i < strs.length; i++)
   al.add(strs[i]);
// ArrayList back to array:
String[] strs2 = al.toArray(new String[0]);