Secrets of toString() method:

toString() method that is declared and implemented in Object class that returns a string representation of the object.


whenever an object is concatenated with a string, using the “+” operator, the Java compiler automatically invokes the toString method to obtain a string representation of the object.


For example:


Point p = new Point(10, 20);

String message = "The current position is " + p; // automatically invokes p.toString()

If x is any object and you callSystem.out.println(x);

then the println method simply calls x.toString() and prints the resulting string.

Object's toString method:

The Object class defines the toString method to print the class name and the memory

location of the object. For example, the call




public String toString() {


return getClass().getName() + "@" + Integer.toHexString(hashCode());

}


For example, the call:System.out.println(System.out);


produces an output that looks like this:


java.io.PrintStream@2f6684


The reason is that the implementor of the PrintStream class didn't bother to override the toString method.