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# Integer.toBinaryString

fred fredricks
Greenhorn
Posts: 16
hi ppl..
i have some code which reads a txt file, and then converts to binary. my problem is that i need it all to be 12bit. but not all of them come out like that.
how can i fill the "result" with 0's (zeros), from left to right till its 12??? i had a go at masking...but i am having trouble understanding that. thanx!!!
thankx ppl....
here is a bit of my code, i dont know if it will help understand;
for (int i = 0; i < data.length; i++)
{
instruction[i] = Integer.valueOf(data[i]).intValue();
}

for (int j = 0; j < data.length; j++)
{
binary[j]= Integer.toBinaryString(instruction[j]);
System.out.println(binary[j]);

Peter den Haan
author
Ranch Hand
Posts: 3252
12 bits? One possible way is to make sure there is always a 13th bit:
private static final int THIRTEENTH_BIT = 1 << 12;
... instruction[j]|THIRTEENTH_BIT; ...
Then you know the bitstring starts with your 13th bit, which you can simply skip using substring():
binary[j] = Integer.toBinaryString(instruction[j]|THIRTEENTH_BIT).substring(1);
Is this the kind of thing you had in mind?
- Peter