Java allows users to convert a character array, `char[] arr`, to a `String`.

There are numerous ways to do so. Let's look at each of them in detail:

# 1. Using the `String` constructor
The simplest conversion method is passing the character array to a String constructor. 

By default, the `String` constructor uses a `copyOf()` method to copy the character array into the `String`. 

Consider the following example:

class HelloWorld {
    public static void main( String args[] ) {
        char[] array = {'H','e','l','l','o'};
        String string = new String(array);
        System.out.printf("Resultant String is: %s" , string);
    }
}

# 2. Using `StringBuilder`
The `StringBuilder` class in Java is used to create mutable, i.e., modifiable `String` objects.

Follow the steps to successfully convert a character array to a `String` using the `StringBuilder` class:
1. Create a `StringBuilder` object
2. Loop through the character array and append each character to the `StringBuilder` object using the built-in `append()` method
3. Convert the `StringBuilder` object to a `String` using the `toString()` method

Look at the following code to see how this works:

class HelloWorld {
    public static void main( String args[] ) {
        char[] array = {'H','e','l','l','o'};
        StringBuilder setbuilder = new StringBuilder();
        for (int i=0; i < array.length; i++)
         {
            setbuilder.append(array[i]);
        }
        String string = setbuilder.toString();
        System.out.printf("Resultant String is: %s" , string);
    }
}

# 3. Using `copyValueOf( )` or `valueOf( )` methods
The `copyValueOf()` and `valueOf()` methods in Java essentially do the same thing, i.e.,  return a `String` based on a particular character array. 

The following codes demonstrate their use:

class HelloWorld {
    public static void main( String args[] ) {
        char[] array = {'H','e','l','l','o'};
        String string = String.copyValueOf(array);
        System.out.printf("Resultant String is: %s" , string);
    }
}

copyValueOf

class HelloWorld {
    public static void main( String args[] ) {
        char[] array = {'H','e','l','l','o'};
        String string = String.valueOf(array);
        System.out.printf("Resultant String is: %s" , string);
    }
}

Converting a character array to a string in Java

1. Using the String constructor

2. Using StringBuilder

3. Using copyValueOf( ) or valueOf( ) methods

1. Using the `String` constructor

2. Using `StringBuilder`

3. Using `copyValueOf( )` or `valueOf( )` methods