Java Create String From Byte Array Including Spaces

Question

I ran into an issue when creating a String from a byte array where values of 0 inside the array are ignored when constructing the string. How can I make it so that if the byte value is 0, the String simply adds a space instead of removing it.

Example, the output of this is DT_TestTracelineCTestTraceli.

public static void main(String[] args) {
    byte[] text = {68, 84, 95, 84, 101, 115, 116, 84, 114, 97, 99, 101, 108, 105, 110, 101, 0, 0, 0, 0, 67, 84, 101, 115, 116, 84, 114, 97, 99, 101, 108, 105};
    System.out.println(new String(text));
}

How can I make it so I can separate those two strings using a tab character or uses spaces so the output is DT_TestTraceline CTestTraceli

Thanks

I believe you should also tell us which encoding you are using to decode the byte array. — Tim Biegeleisen
– Tim Biegeleisen, Commented Dec 22, 2015 at 0:31
I'm reading the bytes from memory directly into a byte array. — Jonathan Beaudoin
– Jonathan Beaudoin, Commented Dec 22, 2015 at 0:33
I tested the code the output is: DT_TestTraceline CTestTraceli — Abdelhak
– Abdelhak, Commented Dec 22, 2015 at 0:36
Possible duplicate of What is character encoding and why should I bother with it — Raedwald
– Raedwald, Commented Dec 22, 2015 at 0:39

nickb · Accepted Answer · 2015-12-22 00:45:26Z

9

You should be specifying an encoding to new String() - Without one, you're using the platform default (which makes your code much less portable, as now you're making assumptions about the environment you're executing on).

Assuming you're using UTF-8, you can replace all of your zeroes with 32, the UTF-8 code for the space character, and it should work:

for(int i = 0; i < text.length; i++) {
    if(text[i] == 0) {
        text[i] = 32; 
    }
}
String result = new String(text, StandardCharsets.UTF_8);

You can see it working on ideone.

edited Dec 22, 2015 at 0:45

answered Dec 22, 2015 at 0:35

nickb

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romeara · Accepted Answer · 2015-12-22 00:35:36Z

4

One way would be to iterate over the array before turning it into a string and replacing '0' characters with the character code for space in whatever character encoding you are using

answered Dec 22, 2015 at 0:35

romeara

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