Convert char array to String in java

In this article, we will take a look at different ways to convert a char array to string in java with example programs and their explanations.
A char array is an array of characters and is of type char[].

Method 1: Using String constructor
java.lang.String class has a constructor which takes a character array as argument and returns a String whose characters are the elements of this char array. Example,

char [] arr = {'c','o','d','i','p','p','a'};
String str = new String(arr);
System.out.println("Char array in string is: " + str);

Output of this program is

Method 2: Using valueOf() method
String class has a valueOf() method which takes a char array argument and returns a String with characters as the value of  array elements.
valueOf() is a static method, so we do not need to create an object of String class. Example code is given below.

char [] arr = {'c','o','d','i','p','p','a'};
String str = String.valueOf(arr);
System.out.println("Char array in string is: " + str);

Output of this program is

Method 3: Using loop
Iterate over the char array using a loop. Add each character to a String inside loop so that after the loop completes, the resultant String contains all the characters.
Since, String is immutable, which means every time a character is added, a new String object is created. For large character array, this would consume a lot of memory.

Therefore, instead of adding character to a String, we should use StringBuilder or StringBuffer classes.
Example program is given below.

char [] arr = {'c','o','d','i','p','p','a'};
StringBuilder builder = new StringBuilder();
for (char c : arr) {
   builder.append(c);
}
String str = builder.toString();
System.out.println("Char array in string is: " + str);

Above example uses enhanced for loop to iterate over the character array, but, simple for loop can also be used.
Output of this program is

Method 4: Using copyValueOf() method
String class has a copyValueOf() method which takes a char array as argument and returns it as a String.
This method is the same as valueOf() method and it is also static. Example,

char [] arr = {'c','o','d','i','p','p','a'}; 
String str = String.copyValueOf(arr); 
System.out.println("Char array in string is: " + str);

Output of this code is

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