Print and access List <String[]>

String[] is an array of strings, hence the reason it is not printing as you would expect, try:

for (int i = 0; i < t1.size(); i++) {
    String[] strings = t1.get(i);
    for (int j = 0; j < strings.length; j++) {
        System.out.print(strings[j] + " ");
    }
    System.out.println();
}

Or more concise:

for (String[] strings : t1) {
    for (String s : strings) {
        System.out.print(s + " ");
    }
    System.out.println();
}

Or better yet:

for (String[] strings : t1) {
    System.out.println(Arrays.toString(strings));
}

As Petar mentioned, your list is a List of Arrays of Strings, so you are printing out the array, not the array contents.

A lazy way to print out the array contents is to convert the array to a List<String> with java.utils.Arrays.toString():

String[] stringArray=new String[] { "hello", world };
System.out.println(Arrays.toString(stringArray));

gives

["hello","world"]

You print a List with arrays. While the List classes overload the toString() method to print each element, the array uses the default toString used by Object which only prints the classname and the identity hash.

To print all you either have to iterate through the List and print each array with Arrays.toString().

for(String[] ar:t1)System.out.print("["+Arrays.toString(ar)+"]");

Or you put each array into a List

List<List<String>> tt1 = new ArrayList<List<String>>();
for(String[] ar: t1)tt1.add(Arrays.asList(ar));//wraps the arrays in constant length lists
System.out.println(tt1)