java 知识点

class DataLoad{
public double[][] LoadTxt(String filePath,int n,int m,int k)
{
double[][] data=new double[m][n];
try {
String encoding="GBK";
File file=new File(filePath);
if(file.isFile() && file.exists()){ //判断文件是否存在
InputStreamReader read = new InputStreamReader(
new FileInputStream(file),encoding);//考虑到编码格式
BufferedReader bufferedReader = new BufferedReader(read);
String lineTxt = null;
String[] temp=new String[15];
for(int i=0;i<m;i++)
{
lineTxt = bufferedReader.readLine();
//System.out.println(lineTxt);
temp=lineTxt.split("\t"); 
for(int j=k;j<k+n;j++)
{
data[i][j-k]=Double.parseDouble(temp[j]);
}

}
read.close();
}else{
System.out.println("找不到指定的文件");
}
} catch (Exception e) {
System.out.println("读取文件内容出错");
e.printStackTrace();
}
return data;
}
}