Matrix Multiplication

It presents a matrix multiplication function and provides an example of the multiplication of a 4x3 matrix by a 3x4 matrix to give a 3x3 matrix as the displayed result.

import java.util.*;
import java.io.*;
import java.text.*;
public class matrices {
void Imprimer(float a[][], int m, int n){
    int i,j;
    for(i=0;i<m;i++){
        for(j=0;j<n;j++){
            System.out.print(a[i][j]+"\t");
            System.out.println("");
        }
    }
}
public static void main( String args[] ){
    matrices M=new matrices();
    float A[][]={{1,2,3,4},{5,6,7,8},{9,10,11,12}};
    float B[][]={{1,2,3},{4,5,6},{7,8,9},{10,11,12}};
    float C[][]=new float [3][3];
    //M.Imprimer(A,3,4);
    //M.Imprimer(B,4,3);
    int m=3, n=4;
    int i,j,k;
    for(i=0;i<m;i++)for(j=0;j<m;j++)C[i][j]=0;
    for(i=0;i<m;i++)for(j=0;j<m;j++)for(k=0;k<n;k++){
        C[i][j]+=A[i][k]*B[k][j];
    }
    M.Imprimer(C,m,m);
    }
}