java learning day14-- two-dimensional array

Two-dimensional array

　　　　Two-dimensional array is used to hold a one-dimensional array

 

　　　　Two-dimensional array of custom format:

　　　　　　Dynamic Initialization Name: Data Type [] [] = new Array name Data type [array size] [];

　　　　　　Static Initialization Name: Data Type [] [] = new Array name Data type [] [] {2,3,5, ...};

　　　　　　　　　　　　　Or  Data Type [] [] array name = {{1,2,3 ...}, {1,2,3 ...}, {1,2,3 ...}, ...};

　　　　　　

 

 

 

　　　　Two-dimensional array assignment:

　　　　　　Array name [index] = new data type [array length];

            Or: array name [index] = new data type [] {a 1-dimensional array, a two-dimensional array, one-dimensional array 3, ...};

　　　　　　It can be simplified to: array name [index] = {a 1-dimensional array, a two-dimensional array, one-dimensional array 3, ...};

　　　　　　The first [] figures refers to the index value of the two-dimensional array mydata , i.e. data; second [] figures refers to the index data of the one-dimensional array, i.e., 5

 

 

　　　　　　You can use Arrays.deepToString (array name) methods for printing multi-dimensional arrays