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Describe The ? operator in Java langauge?
The conditional operator just works for assigning a value to a variable, using a value within a method invocation, or in a few other way that indicates the type of its second and third arguments. For instance, consider the subsequent
if (name.equals("Rumplestiltskin")) { System.out.println("Give back child");}else { System.out.println("Laugh");}This may not be written like this: name.equals("Rumplestiltskin") ? System.out.println("Give back child") : System.out.println("Laugh");
First of all, both the second and third arguments are void. Other than, no assignment is present to denote the type in which is expected for the second and third arguments (though you know void must be wrong).
The first argument to the conditional operator must have or return Boolean type and the second and third arguments must return values compatible along with the value the whole expression can be expected to return. You could never use a void techniques as an argument to the ? : operator.
Explain Subclasses and Polymorphism ? Car and Motorcycle are subclasses of MotorVehicle. If you instantiate a Car or a Motorcycle along with new, you can use in which object a
Byteland county is very famous for luminous jewels. Luminous jewels are used in making beautiful necklaces. A necklace consists of various luminous jewels of particular colour. Nec
What is Initializing Fields ? Fields can (and often should) be initialized while they're declared, just like local variables. class Car { String licensePlate = ""; // e.g
Create a thread in either a C or a Java program and run it. The thread should read a keyboard value "x" and exit from the code, or it can also use an "ESC" to exit. That is, the t
What is Externalizable interface? Externalizable is an interface which have two methods readExternal and writeExternal. These methods give you a control over the serialization
JDBC stands for Java Database Connectivity: It is an API which gives easy connection to a wide range of databases. To connect to a database we have to load the appropriate dri
What is required to be done from my programming is : I enter name,day(saturady or sunday),time( 10AM and 10PM) My program must then vaildate name,day and time. Name must only a
Describe final arguments? At last, you can declare in which method arguments are final. This means that the techniques will not directly change them. Because all arguments are
program code
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