Question

I’m trying to save some data into an array but unfortunately all the data is saving into array[0] while it shouldn’t be like this normally.

int j = 0;
while ( j < data.length ) { 
    float unbin = binary(data[2*j+1])+binary(data[2*j]);
    float[] bin = new float[] {unbin};
    print(bin);
    j = j + 2;
}

it wrote all the data in bin[0] , what’s wrong with my code ?

how could I write :

bin[j] = unbin ? 

to save the data in in bin[0] while j = 0 and so on ?

here is the updated code :

    int j = 0 ;
  float[] bin1 = new float[(data.length/2)];
  while (j < data.length ) {
    if ( data[2*j+2] >= 0  ) {

      String unhx =(binary(data[2*j+3])+binary(data[2*j+2])+binary(data[2*j+1])+binary(data[2*j]));
      float unbin = ((float)unbinary(unhx)/100);
      bin1[j/2] = unbin;
      print(bin1[1]);
    }

    else if  ( data[2*j+2] < 0 && data[2*j+3] < 0 ) {
      data[2*j] = (byte)(-data[2*j]);
      data[2*j+1] = (byte)(-data[2*j+1]);
      String unhx =(binary(data[2*j+1])+binary(data[2*j]));
      float unbin = ((-1)*(float)unbinary(unhx)/100);
      bin1[j/2] = unbin;
      print(bin1[1]);
      }
      j = j + 2;
  }

Answer 1

You’re creating a new array (of length 1) on each iteration. You need to create the array before the while loop:

float[] bin = new float[...];
while (...) {
    ...
    bin[j] = unbin;
}

(It’s unclear what the length should be here – I suspect you don’t want to be multiplying j by 2 and incrementing it by 2 each time.)