Two-dimensional arrays are defined as "an array of arrays". Since an array type is a first-class Java type, we can have an array of ints, an array of Strings, or an array of Objects.
For example, an array of ints will have the type int [ ]. Similarly we can have int [ ][ ], which represents an "array of arrays of ints". Such an array is said to be a two-dimensional array.
A multidimensional array is an array of arrays. Each element of a multidimensional array is an array itself. For example,
Declares a variable, A, of type int [ ][ ], and it initializes that variable to refer to a newly created object. That object is an array of arrays of ints. Here, the notation int[3][4] indicates that there are 3 arrays of ints in the array A, and that there are 4 ints in each of those arrays.
A multidimensional array is an array of arrays. Each element of a multidimensional array is an array itself. For example,
int [ ][ ] A = new int [3][5];
Declares a variable, A, of type int [ ][ ], and it initializes that variable to refer to a newly created object. That object is an array of arrays of ints. Here, the notation int[3][4] indicates that there are 3 arrays of ints in the array A, and that there are 4 ints in each of those arrays.
To process a two-dimensional array, we use nested for loops. We already know about for loop. A loop in a loop is called a Nested loop. That means we can run another loop in a loop.
In this example, "int[ ][ ] A= new int [5][4];" notation shows a two-dimensional array. It declares a variable A of type int [ ][ ],and it initializes that variable to refer to a newly created object. The notation int [5][4] indicates that there are 10 arrays of ints in the array A, and that there are 5 ints in each of those arrays.
int [ ][ ] A = new int [5][4];// print array in rectangular formfor (int i=0; i<A.length; i++) {for (int j=0; j<A[i].length; j++) {System.out.print(" " + A[i][j]);}System.out.println("");}
In this example, "int[ ][ ] A= new int [5][4];" notation shows a two-dimensional array. It declares a variable A of type int [ ][ ],and it initializes that variable to refer to a newly created object. The notation int [5][4] indicates that there are 10 arrays of ints in the array A, and that there are 5 ints in each of those arrays.
Convert Two Dimensional Array into One Dimensional Array
When you run the program, the output will be:
Enter the value of row : 5Enter the value of column : 4Element are Stored in Matrix in row 5 Coloum 453 15 89 5690 30 23 5378 24 46 2711 59 78 5535 46 68 23Element converted to array & Array length is 2053 15 89 56 90 30 23 53 78 24 46 27 11 59 78 55 35 46 68 23