Java实现的求逆矩阵算法示例

package demo;public class MatrixInverse {  public static double Det(double [][]Matrix,int N)//计算n阶行列式（N=n-1）  {    int T0;    int T1;    int T2;    double Num;    int Cha;    double [][] B;    if(N>0)    {      Cha=0;      B=new double[N][N];      Num=0;      if(N==1)      {        return Matrix[0][0]*Matrix[1][1]-Matrix[0][1]*Matrix[1][0];      }      for (T0=0;T0<=N;T0++)//T0循环      {        for (T1=1;T1<=N;T1++)//T1循环        {          for (T2=0;T2<=N-1;T2++)//T2循环          {            if(T2==T0)            {              Cha=1;            }            B[T1-1][T2]=Matrix[T1][T2+Cha];          }          //T2循环          Cha=0;        }        //T1循环        Num=Num+Matrix[0][T0]*Det(B,N-1)*Math.pow((-1),T0);      }      //T0循环      return Num;    } else if(N==0)        {      return Matrix[0][0];    }    return 0;  }  public static double Inverse(double[][]Matrix,int N,double[][]MatrixC){    int T0;    int T1;    int T2;    int T3;    double [][]B;    double Num=0;    int Chay=0;    int Chax=0;    B=new double[N][N];    double add;    add=1/Det(Matrix,N);    for ( T0=0;T0<=N;T0++)    {      for (T3=0;T3<=N;T3++)      {        for (T1=0;T1<=N-1;T1++)        {          if(T1<T0)          {            Chax=0;          } else          {            Chax=1;          }          for (T2=0;T2<=N-1;T2++)          {            if(T2<T3)            {              Chay=0;            } else            {              Chay=1;            }            B[T1][T2]=Matrix[T1+Chax][T2+Chay];          }          //T2循环        }//T1循环        Det(B,N-1);        MatrixC[T3][T0]=Det(B,N-1)*add*(Math.pow(-1, T0+T3));      }    }    return 0;  }  public static void main(String[]args)//测试  {    double[][] TestMatrix = {           {1, 22, 34,22},           {1, 11,5,21} ,           {0,1,5,11},           {7,2,13,19}};    double[][]InMatrix=new double[4][4];    Inverse(TestMatrix,3,InMatrix);    String str=new String("");    for (int i=0;i<4;i++)    {      for (int j=0;j<4;j++)      {        String strr=String.valueOf(InMatrix[i][j]);        str+=strr;        str+=" ";      }      str+="/n";    }    System.out.println("武林网测试结果：");    System.out.println(str);  }}