Answered: I just want to main call (It is only…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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I just want to main call

(It is only one question)

Look at the code below. You have four classes (O, X, T, and M) and a variable of each of these.
O o;
X x;
T t;
M m;
The following assignments are all legal (assume that they all compile):
m = t;
m = x;
o = t;
The following assignments are all illegal (they cause compiler errors):
o = m;
o = x;
x = o;
What can you say about the relationships of these classes? Draw a class diagram.

Main

(I want the complete solution using the codes in bluej program also diagram)

bluej

java cood

4. Look at the code below. You have four classes (O, X, T, and M) and a variable of each of these.
0 0;
X X;
Tt;
Mm;
The following assignments are all legal (assume that they all compile):
m = t;
m = x;
o = t;
The following assignments are all illegal (they cause compiler errors):
o = m;
0 = x;
X = 0;
What can you say about the relationships of these classes? Draw a class diagram.

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