package acme2;

/**
 *http://stackoverflow.com/questions/285712/java-reading-a-file-into-an-array
 * @author Bing
 */


import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class FileArrayProvider {
  
   //reference website:
   //http://stackoverflow.com/questions/1855753/reading-double-values-from-a-file

    public int i, j;
    public Double[][] myArray = null;
            
    
    public void readLines(String filename) throws IOException {
       //public String[] readLines(String filename) throws IOException {
        FileReader fileReader = new FileReader(filename);
        BufferedReader bufferedReader = new BufferedReader(fileReader);
        List<String> lines = new ArrayList<String>();
        String line = null;
        
        while ((line = bufferedReader.readLine()) != null) {
            lines.add(line);
        }
        bufferedReader.close();
        System.out.println(lines.size()); //lines.size()=245880
        

        myArray = new Double[lines.size()/6][6];
        int index = 0;
        for(  i = 0; i < (lines.size()/6); i++){
            for(  j = 0; j < 6; j++){
   
                myArray[i][j] = lines.get(index) ; 
[b]/*Double.parseDouble(lines.get(index))  ;
*Double.valueOf(s).doubleValue();
*问题出在这个二维数组上。原本lines是个string list，现在想把所有的内容读入到类型为double的二位数组myarray里，
尝试了网上提到的几个转换方式都没成功。谁还有好办法啊？谢谢啦
*/
[/b]                index++;
                System.out.println(myArray[i][j]);
            }
        }
    }
}

     
        int cnt = lines.size()%6 == 0 ? lines.size()/6 : lines.size()/6 + 1;
        myArray = new Double[cnt][6];
        int index = 0;
        for(  i = 0; i < myArray.length; i++){
            for(  j = 0; j < 6; j++){
                if (index < lines.size()) { //避免越界
                    if (lines.get(index).matches("\\d+([.]\\d+)?")) {
                        myArray[i][j] = Double.valueOf(lines.get(index));
                    } else {
                        System.out.printf("error double[%s]\n", lines.get(index));
                        myArray[i][j] = 0.0;
                    }
                    System.out.println(myArray[i][j]);
                } else {
                    break;
                }
                index++;
            }
        }

------解决方案--------------------

你的一行数据是3.04134 0.677819 11.4217 5.72507 4.59348 4.00403，怎么能转成Double呢
要分割以后转换，即把3.04134转换，0.677819转换，等等，而不是直接整行转换。
Java code
        myArray = new Double[lines.size()][6]; //既然一行是6个数据，就不要size()/6了
        for(  i = 0; i < myArray.length; i++){
            String data[] = lines.get(i).split("\\s+"); //分割
            for(  j = 0; j < 6; j++){
                if (j < data.length) { //避免越界
                    if (data[j].matches("\\d+([.]\\d+)?")) {
                        myArray[i][j] = Double.valueOf();
                    } else {
                        System.out.printf("error double[%s]\n", data[j]);
                        myArray[i][j] = 0.0;
                    }
                    System.out.println(myArray[i][j]);
                } else {
                    myArray[i][j] = 0.0; //补齐6个数据，缺省为0，LZ可以根据需求而改变
                }
            }
        }