public class Person {
  private String name;

  // constructor and getter/setter omitted
}

System.out.println(myPerson);

Person[] people = //...
System.out.println(people);

System.out.println(myObject);  // invokes myObject.toString()

// Code of Object.toString()
public String toString() {
    return getClass().getName() + "@" + Integer.toHexString(hashCode());
}

public class Person {

  private String name;

  // constructors and other methods omitted

  @Override
  public String toString() {
    return name;
  }
}

@Override
public String toString() {
  return getClass().getSimpleName() + "[name=" + name + "]";
}

Person[] people = { new Person("Fred"), new Person("Mike") };
System.out.println(Arrays.toString(people));

// Prints: [Fred, Mike]

List<Person> people = new ArrayList<>();
people.add(new Person("Alice"));
people.add(new Person("Bob"));
System.out.println(people);

// Prints [Alice, Bob]

{
    SomeClass sc = new SomeClass();
    // Class @ followed by hashcode of object in Hexadecimal
    System.out.println(sc);
}

class A {
    String s = "I am just a object";
    @Override
    public String toString()
    {
        return s;
    }
}

class B {
    public static void main(String args[])
    {
        A obj = new A();
        System.out.println(obj);
    }
}

ReflectionToStringBuilder.toString(object)