Core Java Assignment 24

A10.1-R4: INTRODUCTION TO OBJECT ORIENTED PROGRAMMING THROUGH JAVA.

Assignment 24

A simple digital watch has a display and two buttons to set it, the “A” button and the “B”
button. The watch has two modes of operation, display time and set time. In the display
time mode, hours and minutes are displayed, separated by a flashing colon. The set time
mode has two sub-modes, set hours and set minutes. The “A” button is used to select

Core Java Assignment 23

A10.1-R4: INTRODUCTION TO OBJECT ORIENTED PROGRAMMING THROUGH JAVA.

Assignment 23

The direction control for some of the first toy electric trains was accomplished by

interrupting the power to the train. Prepare state diagrams for the headlight and wheels of

the train, corresponding to the following scenario:

Power is off, train is not moving.

Power is turned on, train moves forward and train headlight shines.

Power in turned off, train stops and headlight goes out.

Core Java Assignment 22

A10.1-R4: INTRODUCTION TO OBJECT ORIENTED PROGRAMMING THROUGH JAVA.

Assignment 22

Prepare a class diagram from the instance diagram in the following figure

Core Java Assignment 21

A10.1-R4: INTRODUCTION TO OBJECT ORIENTED PROGRAMMING THROUGH JAVA.

Assignment 21

The following is a partial taxonomy of rotating electrical machines. Electrical machines may

be categorized for analysis purposes into alternating current (ac) or direct current (dc).

Some machines run on ac, some on dc, and some will run on either. An ac machine may

be synchronous or induction. A few examples of electrical machines include large

synchronous motors, small induction motors, universal motors, and permanent magnet

motors. Most motors found in the homes are usually induction machines or universal

motors. Universal motors are typically used in where high speed is needed such as in

blenders or vacuum cleaners. They will run on either “AC” or “DC”. Permanent magnet

motors are frequently used in toys and will work only on dc.