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Index › Programming Questions & Help › Syntax Questions › VariableDeclaratorId error Spliting array object

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VariableDeclaratorId error Spliting array object (Read 1918 times)

dunkster

VariableDeclaratorId error Spliting array object
Mar 19^th, 2007, 6:51pm

hi, am getting a VariableDeclaratorId expected error fromt he following code. The error is given on the line with code to split my arrayobject into ints and add to second array.

Code:


String lines[] = loadStrings("mosa-dtlz1-run1.txt");
Arraylist array2 = new Arraylist();

  for (int i=0; i < lines.length; i++) {
  Arraylist array1 = new Arraylist();
  
    for (int i=0; i < lines.length; i++) {
    array1.add(int(split(lines[i])));
    }

  array2.add(array1);
}

Any help would be appreciated.
Andrew

fjen God Member Offline Posts: 965	Re: VariableDeclaratorId error Spliting array obje Reply #1 - Mar 19^th, 2007, 7:42pm maybe second lines.length should be lines[i].length and second i should be named differently than first one to avoid conflicts ...

dunkster

Re: VariableDeclaratorId error Spliting array obje
Reply #2 - Mar 19^th, 2007, 7:58pm

Hi, probably a good point, but still getting same error with this;

Code:


String lines[] = loadStrings("mosa-dtlz1-run1.txt");

Arraylist array2 = new Arraylist();

for (int i=0; i < lines.length; i++) {

Arraylist array1 = new Arraylist();

for (int x=0; x < lines[i].length; x++) {
  array1.add(int(split(lines[i])));
}
array2.add(array1);
}

Cheers, Andrew.

fjen

Re: VariableDeclaratorId error Spliting array obje
Reply #3 - Mar 19^th, 2007, 8:21pm

String lines[] = new String[]{"1 2 3 4 5 6 7","3 2 1 3 6 8 5 2 1 1"," 123 123 123 12 3 123 12 3"};

ArrayList array2 = new ArrayList();

for (int i=0; i < lines.length; i++) {

ArrayList array1 = new ArrayList();

for (int x=0; x < lines[i].length(); x++) {
array1.add(int(split(lines[i])));
}
array2.add(array1);
}

something like that?

note that lines[i].length() is not split(lines[i]).length for each char in the line you are adding the whole array to array1 ... should probably be:

String lines[] = new String[]{"1 2 3 4 5 6 7","3 2 1 3 6 8 5 2 1 1"," 123 123 123 12 3 123 12 3"};

ArrayList array2 = new ArrayList();

for (int i=0; i < lines.length; i++) {

ArrayList array1 = new ArrayList();

int[] arr = int(split(lines[i]));
for (int x=0; x < arr.length; x++) {
println( arr[x] );
array1.add(new Integer(arr[x])); // add only takes an object
}
array2.add(array1);
}

best,
F

ddf

Re: VariableDeclaratorId error Spliting array obje
Reply #4 - Mar 19^th, 2007, 8:38pm

What are you trying to accomplish, exactly?

This will put your file into a single ArrayList, though be aware that each line will be an element of the ArrayList. So, array1.get(0), will return the first line of the file.

Quote:

String[] lines = loadStrings("mosa-dtlz1-run1.txt");

ArrayList array1 = new ArrayList();

for(int i = 0; i < lines.length; i++)
{
array1.add(int(split(lines[i])));
}

for(int i = 0; i < array1.size(); i++)
{
print(array1.get(i));
}

http://www.compartmental.net

dunkster

Re: VariableDeclaratorId error Spliting array obje
Reply #5 - Mar 19^th, 2007, 9:53pm

Thanks for the replies.

ddf: I have a file with input in this format;
Code:

0.000119060274316 0.004533755899569 1.329437814393679 
0.000181709578361 0.053673636137741 0.554154118814899 
0.000306569115435 0.010740510485753 0.574698355340854 
0.000586202187103 0.173153243640183 0.434270018703715 
0.000657828856933 0.010389250744255 0.574698355340854 
0.000703266494223 0.006730556338451 0.536801961479428 
0.001004139105338 0.039113795752666 0.504117849454098 
0.001515971252124 0.003136844921760 1.329437814393679

I want to take each line and create a new object, with each integer as a variable of that object. I think the easiest way is to provide my constructor with an array object that has the ints of that line. Therefore im trying to get an Array(list) of Arrays that contain the ints for a single line of the input file.

Fjen: I have tried your code, and only get an output of continuous '0' zeros to the command line, a result of i presume the println (arr[x]); line.

Hopefully ive mad it a bit clearer what im trying to do.
Cheers, Andrew

fjen

Re: VariableDeclaratorId error Spliting array obje
Reply #6 - Mar 19^th, 2007, 10:19pm

first, your values clearly are floats not ints ! so if you run my code against your values it sure will give 0s and 1s ...

to solve your problem:

Code:



class myObjectXYZ
{
    myObjectXYZ (float x, float y, float z) {
    // do something here ...
   }
}

String[] lines = new String[]{
"0.000119060274316 0.004533755899569 1.329437814393679",  
"0.000181709578361 0.053673636137741 0.554154118814899",  
"0.000306569115435 0.010740510485753 0.574698355340854",  
"0.000586202187103 0.173153243640183 0.434270018703715",  
"0.000657828856933 0.010389250744255 0.574698355340854",  
"0.000703266494223 0.006730556338451 0.536801961479428",  
"0.001004139105338 0.039113795752666 0.504117849454098",
"0.001515971252124 0.003136844921760 1.329437814393679"
};

myObjectXYZ[] objects = new myObjectXYZ[lines.length];

for ( int i=0; i < lines.length; i++ )
{
   float[] vals = float(split(lines[i]));
   objects[i] = new myObjectXYZ( vals[0], vals[1], vals[2] );
}

alternativly you sure can store the values in an array:

Code:


float[][] fvalues = new float[lines.length][0];

for ( int i=0; i < lines.length; i++ )
{
   float[] vals = float(split(lines[i]));
   fvalues[i] = new float[]{ vals[0], vals[1], vals[2] };
}

dunkster

Re: VariableDeclaratorId error Spliting array obje
Reply #7 - Mar 19^th, 2007, 11:06pm

Silly me, trying to hard to concentrate on a new language i forget little things like that, Cheers.

Tried your new code, but when i put a

println(fvalues[i]); loop at the end to see what is getting stored i get a very odd output...

Code:

0.06573511
0.3212193
0.15728137
0.0662376
0.2401225
0.27938533
0.06710464
0.0782634
0.44037738
0.06788073
0.10928742
0.4085773
0.06985963
0.4329182
0.08296762
0.07001102
0.5030778
0.010099506
0.070448615
0.12959832
0.3856985
0.07121431...

definitely not the input it was given. Any ideas?

Also your code would only allow for an input that had 3 values per line, would i need to loop the
fvalues[i] = new float[]
code x number of times depending on x number of variables per line?

Thanks for the help. Andrew

ddf

Re: VariableDeclaratorId error Spliting array obje
Reply #8 - Mar 20^th, 2007, 12:14am

dunkster wrote on Mar 19^th, 2007, 11:06pm:

Also your code would only allow for an input that had 3 values per line, would i need to loop the
fvalues[i] = new float[]
code x number of times depending on x number of variables per line

No, you could actually just assign the result of float(split(lines[i])) to fvalues[i].

http://www.compartmental.net

dunkster YaBB Newbies Offline Posts: 19	Re: VariableDeclaratorId error Spliting array obje Reply #9 - Mar 20^th, 2007, 12:22am Indeed i could, thank you. This output is still puzzling me though.

fjen God Member Offline Posts: 965	Re: VariableDeclaratorId error Spliting array obje Reply #10 - Mar 20^th, 2007, 7:18am try double instead of float ... F

dunkster YaBB Newbies Offline Posts: 19	Re: VariableDeclaratorId error Spliting array obje Reply #11 - Mar 20^th, 2007, 11:18am hi, unfortunately split() will not cast into a double, so the following line will not work with doubles... double[] vals = double(split(lines[i])); Cheers.

fjen God Member Offline Posts: 965	Re: VariableDeclaratorId error Spliting array obje Reply #12 - Mar 20^th, 2007, 11:25am right, here's how: String[] svals = split(lines[i]); double[] dvals = new double[svals.length]; for ( int s=0; s < svals.length; s++ ) { dvals[s] = Double.parseDouble(svals[s]); } F

dunkster

Re: VariableDeclaratorId error Spliting array obje
Reply #13 - Mar 20^th, 2007, 6:52pm

ok, have tried your code and am still getting a similar output as before. Its returning 15000+ values from an input file which has only 400 or so. This is the current code;
Code:

String lines[] = loadStrings("mosa-dtlz1-run1.txt");
for ( int i=0; i < lines.length; i++ ) {

String[] svals = split(lines[i]);
double[] dvals = new double[svals.length];
for ( int s=0; s < svals.length; s++ ) {
dvals[s] = Double.parseDouble(svals[s]);
}
    
for ( int x=0; x < svals.length; x++ ) {
println(dvals[x]);
} 
}

fjen God Member Offline Posts: 965	Re: VariableDeclaratorId error Spliting array obje Reply #14 - Mar 20^th, 2007, 7:28pm i don't get what you are saying, the problem that it's returning more values than there are in the file is new ... can you please post the data-file somewhere? F

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