How it is possible to initialize an array in this form with null values? (Java)

Question

How it is possible to initialize an array in this form with null values in Java?

int array[][] = {
            {1, 6, 4, 1,-1},
            {6, 3, 3, 3, 9},
            {6, 3, 3, 3, 9},
            {6, 3, 3, 3, 9},
            {6, 3, 3, 3, 9}
    };

I tried that, but it doesn't work (is that possible?):

int array[][] = {
            {1, 6, 4, 1,-1},
            {6, null, 3, 3, 9},
            {6, 3, 3, 3, 9},
            {6, 3, 3, null, 9},
            {6, 3, 3, 3, 9}
    };

Thanks

Primitives can't be set as `null` – dryairship Feb 09 '16 at 12:28 — dryairship, Feb 09 '16 at 12:28

score 3 · Accepted Answer · answered Feb 09 '16 at 12:27

3

It's only possible with arrays of reference types :

Integer array[][] = {
        {1, 6, 4, 1,-1},
        {6, null, 3, 3, 9},
        {6, 3, 3, 3, 9},
        {6, 3, 3, null, 9},
        {6, 3, 3, 3, 9}
};

Primitive types can't be assigned null, so primitive arrays, such as int arrays, can't contain nulls.

answered Feb 09 '16 at 12:27

Eran

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Thank you, that worked perfect! – Michael Pfeifer Feb 09 '16 at 12:37

How it is possible to initialize an array in this form with null values? (Java)

1 Answers1