设计和编写代表矩阵的Matrix类。该类包括矩阵行列数变量int rows和int cols，矩阵数据数组double data[][]，构造方法Matrix()、Matrix(int rows,int cols)、Matrix(int rows,int cols,double data[][])，获取某元素值的方法getData(int row,int col)，设置某元素值的方法setData(int row,int col,double value)，计算两个矩阵的乘积的方法multiply(Matrix m)以及toString()等内容
public class Matrix {
public Matrix(int rows, int cols, double[][] data) {
this.rows = rows;
this.cols = cols;
this.data = data;
}
public Matrix(int rows, int cols) {
this.rows = rows;
this.cols = cols;
}
public Matrix() {
}
public int rows;
public int cols;
public double[][] data;
public double[][] getData(int row,int col){
return null;
}
public void setData (int row,int col,double value){
}
public void multiply(Matrix m){
}
@Override
public String toString() {
return super.toString();
}
}
public Matrix(int rows, int cols, double[][] data) {
this.rows = rows;
this.cols = cols;
this.data = data;
}
public Matrix(int rows, int cols) {
this.rows = rows;
this.cols = cols;
}
public Matrix() {
}
public int rows;
public int cols;
public double[][] data;
public double[][] getData(int row,int col){
return null;
}
public void setData (int row,int col,double value){
}
public void multiply(Matrix m){
}
@Override
public String toString() {
return super.toString();
}
}
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