Given task is to read a matrix from the user. The size and number of elements of matrices are to be read from the keyboard.

`// Java program to read a matrix from user ` ` ` `import` `java.util.Scanner; ` ` ` `public` `class` `MatrixFromUser { ` ` ` ` ` `// Function to read matrix ` ` ` `public` `static` `void` `readMatrixByUser() ` ` ` `{ ` ` ` `int` `m, n, i, j; ` ` ` `Scanner in = ` `null` `; ` ` ` `try` `{ ` ` ` `in = ` `new` `Scanner(System.in); ` ` ` `System.out.println(` `"Enter the number "` ` ` `+ ` `"of rows of the matrix"` `); ` ` ` `m = in.nextInt(); ` ` ` `System.out.println(` `"Enter the number "` ` ` `+ ` `"of columns of the matrix"` `); ` ` ` `n = in.nextInt(); ` ` ` ` ` `// Declare the matrix ` ` ` `int` `first[][] = ` `new` `int` `[m][n]; ` ` ` ` ` `// Read the matrix values ` ` ` `System.out.println(` `"Enter the elements of the matrix"` `); ` ` ` `for` `(i = ` `0` `; i < m; i++) ` ` ` `for` `(j = ` `0` `; j < n; j++) ` ` ` `first[i][j] = in.nextInt(); ` ` ` ` ` `// Display the elements of the matrix ` ` ` `System.out.println(` `"Elements of the matrix are"` `); ` ` ` `for` `(i = ` `0` `; i < m; i++) { ` ` ` `for` `(j = ` `0` `; j < n; j++) ` ` ` `System.out.print(first[i][j] + ` `" "` `); ` ` ` `System.out.println(); ` ` ` `} ` ` ` `} ` ` ` `catch` `(Exception e) { ` ` ` `} ` ` ` `finally` `{ ` ` ` `in.close(); ` ` ` `} ` ` ` `} ` ` ` ` ` `// Driver code ` ` ` `public` `static` `void` `main(String[] args) ` ` ` `{ ` ` ` `readMatrixByUser(); ` ` ` `} ` `} ` |

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**Output:**

Enter the number of rows of the matrix 2 Enter the number of columns of the matrix 2 Enter the elements of the matrix 1 2 3 4 Elements of the matrix are 1 2 3 4

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