string to char array, showing silly characters

Question

It is a really simple question but I need an another eye to look at my code:

String strtr = "iNo:";
char[] queryNo = strtr.toCharArray();
System.out.println(queryNo + " =this is no");

and the output is:

[C@177b4d3 =this is no

What are these characters, do you have any idea?

what is the expected output? – Jayant Varshney Nov 30 '12 at 08:42 — Jayant Varshney, Nov 30 '12 at 08:42

score 7 · Accepted Answer · answered Nov 30 '12 at 08:29

7

That's how toString() is implemented for arrays.

The [C denotes that is a char array, 177b4d3 is its hashcode.

You may want to look at

System.out.println(Arrays.toString(queryNo) + " =this is no");

if you want to see your original String again, you need this:

System.out.println((new String(queryNo)) + " =this is no");

answered Nov 30 '12 at 08:29

jlordo

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so are you saying it is normal? Shouldnt I see "iNo =this is no" I need to see the sting that I declare at the beggining – hassasin Nov 30 '12 at 08:32
1

@hassasin.. Then why not just print the string. You are aware that `string` and a `char array` are two different things right? – Rohit Jain Nov 30 '12 at 08:33
really thanks. I got these: [i, N, o, :] =this is no iNo: =this is the original no So I have the char array correctly, but when I want to print this char array I should use tostring or new String, right? – hassasin Nov 30 '12 at 08:40
`toString()` would give you what you had, `new String()` what you want. – jlordo Nov 30 '12 at 08:45

score 1 · Answer 2 · answered Nov 30 '12 at 08:36

1

Arrays do not override toString(), it is inherited from Object.toString as

public String toString() {
    return getClass().getName() + "@" + Integer.toHexString(hashCode());
}

answered Nov 30 '12 at 08:36

Evgeniy Dorofeev

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score 1 · Answer 3 · answered Nov 30 '12 at 08:42

you are printing the object

queryno, as queryno is a character array of on dimension and java is an object oriented language which holds every thing in the form of classes it gives the class name [C to your array where [ denotes total dimension and C denotes character type of array, Rest is the hashcode of the object.

score 0 · Answer 4 · answered Nov 30 '12 at 08:33

0

You are trying to print the array and that is the reason you get gibberish. Try using Arrays.toString(queryNo) and you will see what you expected.

answered Nov 30 '12 at 08:33

Narendra Pathai

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string to char array, showing silly characters

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