Ruby无法识别Java编写的双精度型

Question

I am using an algorithms written in Java with such an output feature:

DataOutputStream out = new DataOutputStream(new FileOutputStream("lalala.txt"));

out.writeChars(string_double_copy_B[0] + "/" + string_double_copy_B[1] +  "\t");                                            
out.writeChars(String.valueOf(corrValue));                                      
out.writeChars("\n");

corrValue is a double. string_double_copy_B is a string array.

After that I try to read a produced file with ruby. I have the following code.

input=File.open("lala.txt","r")
genes=[]

input.each_line{|li|

    keys=li.split("\t")
    length=keys.length
    puts(keys[length-1].inspect)

}

and I get such an output:

"\u00000\u0000.\u00009\u00000\u00000\u00002\u00003\u00003\u00006\u00006\u00001\u‌00005\u00003\u00006\u00000\u00002\u00001\u00005\u0000" 

Something wring happens when java writes a double into a file. I have tried as well with PrintWriter out = new PrintWriter(new FileOutputStream("lala...)) It shows me the same thing.

How can I fix it? What is then the appropriate way of writing in java in order to get a normal double?

kik@kik-VirtualBox:~/Desktop$ od -t a -t x1 stemcells09_negative_werte.txt 
0000000 nul   1 nul   0 nul   5 nul   3 nul   _ nul   a nul   t nul   /
         00  31  00  30  00  35  00  33  00  5f  00  61  00  74  00  2f
0000020 nul   R nul   F nul   C nul   2 nul  ht nul   2 nul   0 nul   3
         00  52  00  46  00  43  00  32  00  09  00  32  00  30  00  33
0000040 nul   6 nul   9 nul   6 nul   _ nul   s nul   _ nul   a nul   t
         00  36  00  39  00  36  00  5f  00  73  00  5f  00  61  00  74
0000060 nul   / nul   R nul   F nul   C nul   2 nul  ht nul   0 nul   .
         00  2f  00  52  00  46  00  43  00  32  00  09  00  30  00  2e
0000100 nul   9 nul   0 nul   3 nul   1 nul   6 nul   9 nul   9 nul   6
     00  39  00  30  00  33  00  31  00  36  00  39  00  39  00  36

Answer 1

You write binary representation of String instead of String itself. Use Writer instead to write Strings:

Writer out = new FileWriter("lalala.txt");

out.write(string_double_copy_B[0] + "/" + string_double_copy_B[1] +  "\t");                                            
out.write(String.valueOf(corrValue));                                      
out.write("\n");