ToString nature and String.valueOf ()

Object toString can be converted to a string.

Object.toString();

• But char [] No, starting valueOf.

String.valueOf(char[]);

If toString, output is the address

public class Test2 {

public static void main(String[] args) {
    char[] chArray= {'1','5','6'};
    System.out.println(chArray.toString());
    System.out.println(String.valueOf(chArray));
}

}

I looked under the Java source code:

• toString()

Object Each object has its own hash code, there is a method by some method within the hash code into String Integer.

• String.valueOf

  The char [] configured as String