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Convert zero to byte

I am reading a file and I want to print the byte value in 2 icons if it is less than 10 (example if byte = 1 it should use byte = 01), I don't want to compare it like this:

    if(byte<10){
        stringBuffer buf= new stringBuffer();
        buf.append("0"+byte);
    }

is there a built-in method for this, just like the format function in vc ++?

Thanks gagana

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10 replies


What about:

String twoDigits = String.format("%02d", myByte);


This is much closer to the way things are done, rather than creating your own formatting.

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You can use DecimalFormat

:

NumberFormat nf = new DecimalFormat("00");
buf.append(df.format(byteArray[i]));


Obviously, you are just instantiating it outside of the loop.

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System.out.println(new DecimalFormat("00").format(9));

prints 09 for me.

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See java.util.Formatter

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java.util.Formatter

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"a" is 10 in hexadecimal.

So change the format lines from "% 02x" to "% 02d"

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Take a look at the Formatter class

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byte b = ...
System.out.println(String.format("%02x",b));
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For "small" values ​​of b, this should be fine:

String s = "" + b;
while(s.length() < 2) {
   s = "0" + s;
 }
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I'm not very comfortable with the java syntax ... But here's the way ... Maybe you need to find the equal on the right for java

buf.append (right (("00" + byte), 2))

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