编写求矩阵的逆矩阵用java实现

import java.io.*;
import java.util.StringTokenizer;

public class Test {
private int N;
private double[][] src;
private double[][] result;

public Test() {

}
public static void main(String[] args) throws Exception {
new Test().exec();
}

private void exec() throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
System.out.print( "Input N: ");
System.out.flush();
String line = reader.readLine();
N = Integer.parseInt(line);

src = new double[N][];
result = new double[N][];

for(int i = 0; i < N; i++) {
line = reader.readLine();
src[i] = new double[N];
result[i] = new double[N];
result[i][i] = 1;

StringTokenizer st = new StringTokenizer(line, "