How many parameters does the emplace_back method for the std::vector container accept?

The toString() method in Java is used to obtain a string representation of an object. By default, it is defined in the Object class and returns a string containing the class name and hash code, which is usually not informative.

Overriding toString() in your classes allows you to output the object's contents in a readable format, which is useful for debugging and logging.

Example:

public class Person {
    private String name;
    private int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    @Override
    public String toString() {
        return "Person{name='" + name + "', age=" + age + "}";
    }
}

// Usage:
Person p = new Person("Ivan", 30);
System.out.println(p); // Will print: Person{name='Ivan', age=30}

Thus, toString() helps get a readable description of the object.