Question

Java Time Class

Class declarations are one of the ways of defining new types in Java. we will create two classes that both represent time values for a 24 hours period. The valid operations are as follows.

int getHours(): returns the number of hours

int getMinutes(): returns the number of minutes

int getSeconds(): returns the number of seconds

String toString(): returns a String representation

boolean equals(Time other): returns true if and only if other designates an object that has the same content as this one

void increase(): increases this time by one second

1 Time1

Declare a class Time1

Declare a constructor initializing values of three instance variables i.e. hours, minutes and seconds. Knowing that the instance variables of the class Time1 has been declared to be private.

getters: implement the access methods that return the value of hours, minutes and seconds respectively

Create the following two class methods: void increase(): increment the time by one seconds and print them. boolean equals(Time1 other): returns true if and only if other designates an object that has the same content as this one

2 Time2

Let’s consider an alternative way of representing time values. Create a new class called Time2.

Inheritance: Class Time2 inherits Time1 and add another instance variable millisecond and initialize it along with instance variables of Time1 using constructor

Override method boolean equals(Time other) of Time1 as now it includes another instance variable i.e. milliseconds.