c1 = r2 The order of matrix determines the possible number of elements in the matrix. In case of matrix multiplication, one row element of first matrix is multiplied by all columns of second matrix. Next, we used the For Loop to iterate those matrix values. Java program for matrix multiplication In the matrix multiplication Java program, initially user is prompted to enter the matrices. 2) Read row,column numbers of matrix1, matrix2 and check column number of matrix1= row number of matrix2. To multiply two matrix, number of columns of first matrix should be equal to number of rows of second matrix. 1. Insert sum in to the resultant matrix at res[i][j],increase j value, then checks the condition j C_ij as a naive solution. First is that it multiplies the value of a variable on the left side with the evaluated value of the expression on the right side. It has both implementation of matrix multiplication- one without multi-threading and another one using multi-threading. 6) Read a[i][j]. In mathematics, matrix multiplication or the matrix product is a binary operation that produces a matrix from two matrices. I first created threads equal to the result matrix's column. We can multiply two matrices in java using binary * operator and executing another loop.