How to convert a char array back to a string?

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?

14 Answers

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.

String text = String.copyValueOf(data);

or

String text = String.valueOf(data);

is arguably better (encapsulates the new String call).

This will convert char array back to string:

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

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".

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.

Just use String.value of like below;

 private static void h() { String helloWorld = "helloWorld"; System.out.println(helloWorld); char [] charArr = helloWorld.toCharArray(); System.out.println(String.valueOf(charArr)); } 

package naresh.java; public class TestDoubleString { public static void main(String args[]){ String str="abbcccddef"; char charArray[]=str.toCharArray(); int len=charArray.length; for(int i=0;i<len;i++){ //if i th one and i+1 th character are same then update the charArray try{ if(charArray[i]==charArray[i+1]){ charArray[i]='0'; }} catch(Exception e){ System.out.println("Exception"); } }//finally printing final character string for(int k=0;k<charArray.length;k++){ if(charArray[k]!='0'){ System.out.println(charArray[k]); } } } } 

 //Given Character Array char[] a = {'h', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd'}; //Converting Character Array to String using String funtion System.out.println(String.valueOf(a)); //OUTPUT : hello world 

Converting any given Array type to String using Java 8 Stream function

String stringValue = Arrays.stream(new char[][]{a}).map(String::valueOf).collect(Collectors.joining()); 

Try to use java.util.Arrays. This module has a variety of useful methods that could be used related to Arrays.

Arrays.toString(your_array_here[]); 

Try this

Arrays.toString(array) 

String output = new String(charArray); 

Where charArray is the character array and output is your character array converted to the string.

Try this:

CharSequence[] charArray = {"a","b","c"}; for (int i = 0; i < charArray.length; i++){ String str = charArray.toString().join("", charArray[i]); System.out.print(str); } 

You can also use StringBuilder class

String b = new StringBuilder(a).toString(); 

Use of String or StringBuilder varies with your method requirements.

1 alternate way is to do:

String b = a + "";