Category: Java

LANGUAGE:  JAVA CHALLENGE: Declare a String variable named mailingAddress.

LANGUAGE:  JAVA CHALLENGE: Write the declaration of a String variable named title.

LANGUAGE:  JAVA CHALLENGE: Assume that logger is a reference to an object that has a method named printErrorDescription, that accepts one int argument and returns no value. Write a statement that invokes the method printErrorDescription, passing it the value 14

LANGUAGE:  JAVA CHALLENGE: Assume that dataTransmitter is a variable that refers to an object that provides a method, named sendObject. There is one argument for this method, a reference to a Customer object. Assume that there is a reference to an object of type Customer, in a variable called john_doe. Invoke the method, using this […]

LANGUAGE:  JAVA CHALLENGE: Assume that dataTransmitter is a variable that refers to an object that provides a method, sendSignal that takes no arguments. Write the code for invoking this method.

LANGUAGE:  JAVA CHALLENGE: Assume that arithmetic is a reference to an object that has a method named add, that accepts two int arguments and returns their sum. Two int variables, euroSales and asiaSales, have already been declared and initialized. Another int variable, eurasiaSales, has already been declared. Write a statement that calls add to compute […]

LANGUAGE:  JAVA CHALLENGE: One of the constructors for PrintStream class has a single OutputStream argument. Assume that dos is a variable that references an OutputStream object. Create a PrintStream object using dos and assign the resulting reference to ps, a PrintStream variable that has already been declared.

LANGUAGE:  JAVA CHALLENGE: Suppose a reference variable of type String called myString has already been declared. Create an object of type String and assign it to the reference variable myString.

LANGUAGE:  JAVA CHALLENGE: Suppose a reference variable of type Double called myDouble has already been declared. There is also a double variable x that has been declared and initialized. Create an object of type Double with the initial value of x and assign it to the reference variable myDouble.

LANGUAGE:  JAVA CHALLENGE: Declare a reference variable of type File named myFile.

LANGUAGE:  JAVA CHALLENGE: Declare a variable named myMenu suitable for holding references to Menu objects.