JAVA Which methods can you call on a variabe of type Class without using casts?

Matrix Multiplication Write a method called multiply in the Matrix class that takes an instance of Matrix as a parameter and returns the result of matrix multiplication. Complete the definition of the class Matrix and method definition multiply shown here and in the starter code. public class Matrix { public Matrix multiply(Matrix other) { // fill in code here } } For purposes of this exercise, you should assume (without checking) that the matrices to be multiplied have the correct shapes, ie, that this.numCols() is equivalent to other.numRows(). To multiply matrices, the number of columns in the first matrix must equal the number of rows in the second matrix. In general, if we multiply an m x n matrix A (ie, having m rows and n columns) by a n x p matrix B (ie, having n rows and p columns), the product will have size m x p (ie, m rows and p columns). Here is a simple illustration of the computation for two 2 x 2 matrices:     Examples Example 1 If A and B were both instances of the…

PLZ help with the following: True/False  In java it is possible to throw an exception, catch it, then re-throw that same exception if it is desired GUIs are windowing interfaces that handle user input and output. An interface can contain defined constants as well as method headings or instead of method headings. When a recursive call is encountered, computation is temporarily suspended; all of the information needed to continue the computation is saved and the recursive call is evaluated. Can you have a static method in a nonstatic inner class?

Java programming - please see attched image for initial instruction before the following below. Write a subclass of VowelSeparator that adds three additional methods and a constructor.  The class should be named VowelSeparatorAndCounter.  Here are the methods to add:  void setString(String s)  This method should replace the string stored by the object with s.  If the argument is null then the method should throw an IllegalArgumentException. (This is an unchecked exception) int getVowelCount() This method should return the number of vowels in the string.int getNonVowelCount() This method should return the number of characters in the string that are not vowels.   Write a static method that accepts an array of VowelSeparatorAndCounter objects and returns the total number of vowels contained in all of them. It should have the following signature:  public static int totalVowelCount(VowelSeparatorAndCounter[] a)