Java如何以编程方式初始化2d对象数组？

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.

Answer 1

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

Answer 2

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

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

Answer 3

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