Java how to programmatically initialize 2d object array?

Question

Object[][] dataEntriesg = {
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
        {"","","","",""},
};

I want to initialize 2d array such as this. the way I am doing it is so stupid. How can I use a loop to do it? I have tried to put it in for loop. But seems {} can be used only at declaration.

You could use a single loop, but I think you'll find a compound for-loop easier (two loops, one within the other...) — MadProgrammer
– MadProgrammer, Commented Jan 27, 2015 at 23:33
@m0skit0 coz I need to pass in this in to a function requires object[][] type — BufBills
– BufBills, Commented Jan 28, 2015 at 15:18

MadProgrammer · Accepted Answer · 2015-01-27 23:35:21Z

2

You could use a compound for-loop, something like...

dataEntriesg = new Object[25][5];
for (int row = 0; row < dataEntriesg.length; row++) {
    for (int col = 0; col < dataEntriesg[row].length; col++) {
        dataEntriesg[row][col] = "";
    }
}

...for example

answered Jan 27, 2015 at 23:35

MadProgrammer

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Comments

Kick Buttowski · Accepted Answer · 2015-01-27 23:48:40Z

1

Used my sample as a blue print

For example, suppose x = new int[3][4], x[0], x[1], and x[2] are one-dimensional arrays and each contains four elements, as shown in the figure x.length is 3, and x[0].length, x[1].length, and x[2].length are 4

enter image description here

How to traverse and intilize the 2D array you can follow following sample as your blue print:

enter image description here

answered Jan 27, 2015 at 23:48

Kick Buttowski

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Comments

Pablo Gallego Falcón · Accepted Answer · 2015-01-28 10:23:45Z

0

for (int i = 0; i < dataEntriesg.length ; i++) {
    Arrays.fill(dataEntriesg [i], "");
}

answered Jan 28, 2015 at 10:23

Pablo Gallego Falcón

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