How to convert a char array back to a string?

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I have a char array:

char[] a = {'h', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd'};

My current solution is to do

String b = new String(a);

But surely there is a better way of doing this?

No, that solution is absolutely correct and very minimal.

Note however, that this is a very unusual situation: Because String is handled specially in Java, even "foo" is actually a String. So the need for splitting a String into individual chars and join them back is not required in normal code.

Compare this to C/C++ where "foo" you have a bundle of chars terminated by a zero byte on one side and string on the other side and many conversions between them due do legacy methods.

How to convert a char array back to a string?, You can add another method which we've in String Class i.e. copyValueOf(char array[]) . this also returns String if we send a array of characters. Reply. Leave a� There are two ways to convert a char array (char []) to String in Java: 1) Creating String object by passing array name to the constructor. 2) Using valueOf () method of String class. Example: This example demonstrates both the above mentioned ways of converting a char array to String. Here we have a char array ch and we have created two strings str and str1 using the char array.

String text = String.copyValueOf(data);

or

String text = String.valueOf(data);

is arguably better (encapsulates the new String call).

How to convert a char array to a string in Java?, This is one of the easiest ways of converting a char array to a String. It internally invokes String#valueOf to create a String object. i am doing a porter stemmer..the code gives me output in char array.but i need to convert that into string to proceed with futher work..in the code i have given 2 words "looking" and "walk

This will convert char array back to string:

char[] charArray = {'a', 'b', 'c'};
String str = String.valueOf(charArray);

Convert Character Array to String in Java, char[] arr = { 'p', 'q', 'r', 's' }; The method valueOf() will convert the entire array into a string. String str = String. valueOf(arr); Method 1: Approach: Get the character array and its size. Create an empty string. Iterate through the character array. As you iterate keep on concatenating the characters we encounter in the character array to the string. Return the string. Below is the implementation of the above approach. filter_none.

String str = "wwwwww3333dfevvv";
char[] c = str.toCharArray();

Now to convert character array into String , there are two ways.

Arrays.toString(c);

Returns the string [w, w, w, w, w, w, 3, 3, 3, 3, d, f, e, v, v, v].

And:

String.valueOf(c)

Returns the string wwwwww3333dfevvv.

In Summary: pay attention to Arrays.toString(c), because you'll get "[w, w, w, w, w, w, 3, 3, 3, 3, d, f, e, v, v, v]" instead of "wwwwww3333dfevvv".

Copy char array to string in Java, using namespace std;. // converts character array. // to string and returns it. string convertToString( char * a, int size). {. int i;. string s = "" ;. Another plausible way of converting a char array to String is using StringBuilder in Java. The idea is to iterate over the characters and append each char to a StringBuilder. Finally, call toString()method on the StringBuilder when iterated over all chars. // Convert char array to String in Java

A String in java is merely an object around an array of chars. Hence a

char[]

is identical to an unboxed String with the same characters. By creating a new String from your array of characters

new String(char[])

you are essentially telling the compiler to autobox a String object around your array of characters.

Convert character array to string in C++, Java program to demonstrate the. // conversion of a char[] array. // to a string. public class GFG {. // Function to convert a character. // array to a string using the. Here we use the StringBuilder type to convert a char array to a string. We append each char to the StringBuilder, and then call () ToString. Info: We can transform the chars before we append them to the StringBuilder, or add other string data as we go along.

Convert Character Array To String In Java, Use the string constructor and StringBuilder. Convert char array, string. A char array can be converted into a string. The syntax to perform this conversion� The string class constructor takes an array of characters to create a new string from an array of characters. The following code snippet creates two strings. First from a string and second by direct passing the array in the constructor. // Convert char array to string

C# Convert Char Array to String, Use the String constructor to convert a char array into a String. Round-trip: In computer software, a round-trip method returns the converted data to its original� In this post, we will discuss how to convert a char array to a C++ string. 1. String constructor. The string class provides a constructor which can accept a c-string (a null-terminated character sequence). It has following prototype: string (const char* s); where s is a pointer to an array of characters (such as a c-string).

Java Convert Char Array to String, Your solution is absolutely correct and very insignificant. Note, however, that this is a highly unique place: Because String is managed� This can be done with the help of c_str () and strcpy () function. The c_str () function is used to return a pointer to an array that contains a null terminated sequence of character representing the current value of the string. Syntax: const char* c_str () const ;

Comments
  • Why do think that there is a better way? And don't call me Shirley. :)
  • Because I always associate making new variables such as the above to have a slight over head during runtime. Like if I put the above line to convert a char array to a string into a for loop for example, to me it doesn't quite look right. And yes I'm a bit of a perfectionist. . .
  • If you have a lot of these guys, say an array or collection of char[], then perhaps you would append the char arrays to a StringBuffer, but for a String here or there, what you've posted is what most use.
  • If you are looking for a way to avoid copying the char[] then there isn't one. Otherwise you could subvert String's immutability.
  • "making new variables" incurs zero overhead. A variable is a name used to refer to a value, and the name itself isn't present anywhere in memory at runtime (at least, not in a language like Java where reflection is fairly limited). The "overhead" comes from constructing a new value, and there is no way around that in your case, considering that your problem is "construct this value". You cannot cause the char array to magically transmogrify into a String. You can arrange for the original char array to be garbage-collected after the String is created.
  • Both methods call String(char[]) or a variant of that. And the copy part is done inside String(char[]). This leaves no benefit to a direct call besides symmetry with the other valueOf methods.
  • static and more OOP is a contradiction of terms. Anything declared static is not part an object or its behaviour and hence not object oriented. Besides of this - if there would be any chance that the implementation of String will be changed and/or enhanced in an incompatible way or several competing implementations can be chosen at runtime, then a static factory method makes sense. This will not happen with such a low level thing as String. Therefore my premise is: Use the smallest hammer suitable, not the largest one available.
  • @A.H. I don't know about that. String gave way to StringBuffer which gave way to StringBuilder. I bet StringBuffer proponents said the same thing then, and now have to refactor code to use StringBuilder.
  • @A.H. The fact that they had to create the CharSequence interface shows how flawed your "wont happen with low level stuff like string" is - they don't change what goes on in string because they tied themselves to it early on, and now they wish they wouldn't have.
  • @corsiKa I did not say, that the String API is all good and golden. Only that it won't change in an incompatible way and that the class itself and its constructors won't go anywhere. :-)
  • While this code may answer the question, providing additional context regarding why and/or how this code answers the question improves its long-term value.
  • Why though? What do you get from doing this?
  • this is wrong as it assumes that toString works correctly on char[]. It might work on some specific vendors and versions of the JVM.
  • Because String class is immutable, this will cause two operations to be performed: toString() call on a and creation of another String object that concatenates with a.toString() and ""