list of string to string array in java

1String string = list.stream().map(Object::toString).collect(Collectors.joining(""));

1        String[]result=stringList.toArray(new String[0]);

1ArrayList<String> al = new ArrayList<String>();
2      al.add("Hello");
3      al.add("Wor");
4      al.add("ld");
5      StringBuffer sb = new StringBuffer();
6      
7      for (String s : al) {
8         sb.append(s);
9         sb.append(" ");
10      }
11      String str = sb.toString();
12      System.out.println(str);//"Hello wor ld" 

1list.toArray(new String[0]);

1ArrayList<String> list = new ArrayList<String>();
2list.add("one");
3list.add("two");
4list.add("three");
5
6StringBuilder sb = new StringBuilder();
7for (String s : list)
8{
9    sb.append(s);
10    sb.append("\t");
11}
12
13System.out.println(sb.toString());
14