4.7multimatrix.java

JAVA程序设计的源代码

public class MultiMatrix {
int[][] multiplyMatrix;
public void mMatrix(int[][] a,int[][] b){
multiplyMatrix=new int[a.length][b[0].length];
for (int i = 0; i<a.length; i++) {    //通过三层循化进行矩阵乘法运算
for (int j = 0; j<b[0].length; j++) {
for (int k = 0; k<a[0].length; k++) {
multiplyMatrix[i][j]=multiplyMatrix[i][j]+a[i][k]*b[k][j];    //矩阵乘法运算规则
}
}
}
}
public void display(){
for (int i = 0; i<multiplyMatrix.length; i++) {   //打印结果矩阵
for (int j = 0; j<multiplyMatrix[0].length; j++) {
System.out.print (multiplyMatrix[i][j]+" ");
}
System.out.println ("");
}
}

public static void main(String args[]){
int[][] a={{1,0,3,-1},{2,1,0,2}};   //声明两个二维数组并初始化
int[][] b={{4,1,0},{-1,1,3},{2,0,1},{1,3,4}};
MultiMatrix matrix=new MultiMatrix();
matrix.mMatrix(a,b);    //进行矩阵乘法
matrix.display();
}

}