Java - Return two dimensional array value

Asked Mar 23 '17 at 16:20

Active Mar 23 '17 at 16:20

Viewed 26 times

I want to return all values of 2D array. How I can return it if I use get method with String type?

public class Data {
private final String[][] table;
public Data(){
    table = new String[][] {{"ID", "NAME"},
                         {"101", "A"},
                         {"102", "B"},
                         {"103", "C"},
                         {"104", "D"},
                         {"105", "E"}};
}

public String[][] get(){
    for (int i = 0; i < table.length; i++) {
        for (int j = 0; j < table[i].length; j++) {
            table[i][j] = table[i][j];
        }
    }
    return table;
}

public void displayMessage(){
    System.out.println(get());
}

}

asked Mar 23 '17 at 16:20

Mark Martin

3

Why do you write `table[i][j] = table[i][j]`? The entire `get` method can be reduced into `return table`... – Willem Van Onsem Mar 23 '17 at 16:21
1

What output do you expect? – antonio081014 Mar 23 '17 at 16:21
Where's the problem? You're already returning the array from `get()`. What bugs me is that needless iteration inside the method though. And what you're probably getting at is the output of `System.out.println(get());`. You'll probably get is something like `[[Ljava.lang.String;@1db9742` and you want the array content printed, right? – Thomas Mar 23 '17 at 16:22
Question is not clear. What are you trying to get as output? – jrmullen Mar 23 '17 at 16:22
I want to print out all the values – Mark Martin Mar 23 '17 at 16:22
@MarkMartin: one item at each line? Or one line per "*row*"? – Willem Van Onsem Mar 23 '17 at 16:23
1

`System.out.println(Arrays.deepToString(get()));` – 4castle Mar 23 '17 at 16:24
If you want to print the elements line by line try iterating over the first dimension and call `System.out.println( Arrays.toString( table[i] ) );` – Thomas Mar 23 '17 at 16:25
@WillemVanOnsem One line/row – Mark Martin Mar 23 '17 at 16:25
@Thomas How if I won't to use Arrays.toString ? – Mark Martin Mar 23 '17 at 16:26
`for (String[] row : table) System.out.println(Arrays.stream(row).collect(Collectors.joining(", ")));` – Andreas Mar 23 '17 at 16:29
Well then use what Andreas suggested or use nested loops and either build a string that's printed at the end or call `System.out.print()` etc. as you iterate. – Thomas Mar 23 '17 at 17:02

Java - Return two dimensional array value

0 Answers0