ArrayList<String> al = new ArrayList<String>(); al.add("Hello"); al.add("Wor"); al.add("ld"); StringBuffer sb = new StringBuffer(); for (String s : al) { sb.append(s); sb.append(" "); } String str = sb.toString(); System.out.println(str);//"Hello wor ld"
String[] arr = list.toArray(new String[list.size()]);
new ArrayList( Arrays.asList( new String[]{"abc", "def"} ) );