Design a superclass called Staff with details as StaffId, Name, Phone, Salary. Extend this class by writing three subclasses namely Teaching (domain, publications), Technical (skills), and Contract (period). Write a Java program to read and display at least 3 staff objects of all three categories.
1 package program2.staff;
2
3 public class Staff {
4
5 protected String staffId;
6 protected String name;
7 protected String phone;
8 protected String salary;
9
10 public Staff(String staffId, String name, String phone, String salary) {
11
12 this.staffId = staffId;
13 this.name = name;
14 this.phone = phone;
15 this.salary = salary;
16 }
17
18 @Override
19 public String toString() {
20
21 return "Staff [staffId=" + staffId + ", name=" + name + ", phone=" + phone + ", salary=" + salary + "]";
22
23 }
24
25 }
26
27 package program2.staff;
28
29 import java.util.Arrays;
30
31 public class Teaching extends Staff {
32
33 private String domain;
34 private String[] publications;
35
36 public Teaching(String staffId, String name, String phone, String salary, String domain, String[] publications) {
37
38 super(staffId, name, phone, salary);
39
40 this.domain = domain;
41 this.publications = publications;
42
43 }
44
45 @Override
46 public String toString() {
47 return "Teaching " + super.toString() + "\n" + "[domain=" + domain + ", publications="
48 + Arrays.toString(publications) + "]";
49 }
50
51 }
52
53 package program2.staff;
54
55 import java.util.Arrays;
56
57 public class Technical extends Staff {
58
59 private String[] skills;
60
61 public Technical(String staffId, String name, String phone, String salary, String[] skills) {
62
63 super(staffId, name, phone, salary);
64
65 this.skills = skills;
66
67 }
68
69 @Override
70 public String toString() {
71 return "Technical " + super.toString() + "\n" + "[skills=" + Arrays.toString(skills) + "]";
72 }
73
74 }
75
76 package program2.staff;
77
78 public class Contract extends Staff {
79
80 private String period;
81
82 public Contract(String staffId, String name, String phone, String salary, String period) {
83
84 super(staffId, name, phone, salary);
85
86 this.period = period;
87
88 }
89
90 @Override
91 public String toString() {
92 return "Contract " + super.toString() + "\n" + "[period=" + period + "]";
93 }
94
95 }
96
97 package program2.staff;
98
99 import java.util.Scanner;
100
101public class StaffDemo {
102
103 public static void menu() {
104
105 System.out.println("\n\tMENU");
106
107 System.out.println("1. Teaching Staff Entry");
108 System.out.println("2. Technical Staff Entry");
109 System.out.println("3. Contract Staff Entry");
110
111 System.out.println("4. Display Staff Details");
112
113 System.out.println("5. Exit");
114
115 }
116
117 public static String[] readStaffData() {
118
119 Scanner s = new Scanner(System.in);
120 String[] data = new String[4];
121
122 System.out.println("Staff Id: ");
123 data[0] = s.next();
124 System.out.println("Name: ");
125 data[1] = s.next();
126 System.out.println("Phone: ");
127 data[2] = s.next();
128 System.out.println("Salary: ");
129 data[3] = s.next();
130
131 return data;
132
133 }
134
135 public static void main(String[] args) {
136
137 String[] data;
138 int staffCount = 0;
139 int n;
140
141 Staff[] staff = new Staff[15];
142
143 Scanner s = new Scanner(System.in);
144
145 for (;;) {
146
147 menu();
148
149 System.out.println("\nEnter your choice: ");
150 int ch = s.nextInt();
151
152 switch (ch) {
153
154 case 1:
155 System.out.println("\nEnter Teaching Staff details one / one");
156
157 data = readStaffData();
158
159 System.out.println("Domain: ");
160 String domain = s.next();
161
162 System.out.println("Publications count: ");
163 n = s.nextInt();
164
165 String[] publications = new String[n];
166 System.out.println("Give " + n + " Publication details one / one");
167 for (int i = 0; i < n; ++i) {
168 publications[i] = s.next();
169 }
170
171 staff[staffCount++] = new Teaching(data[0], data[1], data[2], data[3], domain, publications);
172
173 break;
174
175 case 2:
176 System.out.println("Enter Technical Staff details one / one");
177
178 data = readStaffData();
179
180 System.out.println("Skills count: ");
181 n = s.nextInt();
182
183 String[] skills = new String[n];
184 System.out.println("Give " + n + " Skill details one / one");
185 for (int i = 0; i < n; ++i) {
186 skills[i] = s.next();
187 }
188
189 staff[staffCount++] = new Technical(data[0], data[1], data[2], data[3], skills);
190
191 break;
192
193 case 3:
194 System.out.println("Enter Contract Staff details one / one");
195
196 data = readStaffData();
197
198 System.out.println("Period: ");
199 String period = s.next();
200
201 staff[staffCount++] = new Contract(data[0], data[1], data[2], data[3], period);
202
203 break;
204
205 case 4:
206 System.out.println("Staff details are...\n");
207 for (int i = 0; i < staffCount; ++i) {
208 System.out.println(staff[i]);
209 System.out.println();
210 }
211 break;
212
213 case 5:
214 System.exit(0);
215
216 }
217
218 }
219
220 }
221
222} |
|
OUTPUT:
MENU
1. Teaching Staff Entry
2. Technical Staff Entry
3. Contract Staff Entry
4. Display Staff Details
5. Exit
Enter your choice: 1
Enter Teaching Staff details one / one
Staff Id: CS111
Name: John
Phone: 987654321
Salary: 30000
Domain: CSE
Publications count: 3
Give 3 Publication details one / one
IJSTR
STS
OAJST
MENU
1. Teaching Staff Entry
2. Technical Staff Entry
3. Contract Staff Entry
4. Display Staff Details
5. Exit
Enter your choice: 1
Enter Teaching Staff details one / one
Staff Id: ISE
Name: Jack
Phone: 978456321
Salary: 30000
Domain: ISE
Publications count: 4
Give 4 Publication details one / one
IJSTR
STS
OAJST
JMST
MENU
1. Teaching Staff Entry
2. Technical Staff Entry
3. Contract Staff Entry
4. Display Staff Details
5. Exit
Enter your choice: 1
Enter Teaching Staff details one / one
Staff Id: CS333
Name: Tony
Phone: 978456321
Salary: 35000
Domain: CSE
Publications count: 2
Give 2 Publication details one / one
JMST
OAJST
MENU
1. Teaching Staff Entry
2. Technical Staff Entry
3. Contract Staff Entry
4. Display Staff Details
5. Exit
Enter your choice: 2
Enter Technical Staff details one / one
Staff Id: TS111
Name: Depp
Phone: 978736521
Salary: 25000
Skills count: 3
Give 3 Skill details one / one
C
C++
JAVA
MENU
1. Teaching Staff Entry
2. Technical Staff Entry
3. Contract Staff Entry
4. Display Staff Details
5. Exit
Enter your choice: 2
Enter Technical Staff details one / one
Staff Id: TS121
Name: Angelina
Phone: 789456123
Salary: 25000
Skills count: 4
Give 4 Skill details one / one
C
PYTHON
R
HTML
MENU
1. Teaching Staff Entry
2. Technical Staff Entry
3. Contract Staff Entry
4. Display Staff Details
5. Exit
Enter your choice: 2
Enter Technical Staff details one / one
Staff Id: TS123
Name: Cruise
Phone: 789123456
Salary: 20000
Skills count: 2
Give 2 Skill details one / one
HTML
JavaScript
MENU
1. Teaching Staff Entry
2. Technical Staff Entry
3. Contract Staff Entry
4. Display Staff Details
5. Exit
Enter your choice: 3
Enter Contract Staff details one / one
Staff Id: CF100
Name: John Travolta
Phone: 987451236
Salary: 15000
Period: 1
MENU
1. Teaching Staff Entry
2. Technical Staff Entry
3. Contract Staff Entry
4. Display Staff Details
5. Exit
Enter your choice: 3
Enter Contract Staff details one / one
Staff Id: CF120
Name: Arnold
Phone: 456789123
Salary: 15000
Period: 2
MENU
1. Teaching Staff Entry
2. Technical Staff Entry
3. Contract Staff Entry
4. Display Staff Details
5. Exit
Enter your choice: 3
Enter Contract Staff details one / one
Staff Id: CF130
Name: Kate
Phone: 123456789
Salary: 10000
Period: 3
MENU
1. Teaching Staff Entry
2. Technical Staff Entry
3. Contract Staff Entry
4. Display Staff Details
5. Exit
Enter your choice: 4
Staff details are...
Teaching Staff [staffId=CS111, name=John, phone=987654321, salary=30000]
[domain=CSE, publications=[IJSTR, STS, OAJST]]
Teaching Staff [staffId=ISE111, name=Jack, phone=978456321, salary=30000]
[domain=ISE, publications=[IJSTR, STS, OAJST, JMST]]
Teaching Staff [staffId=CS333, name=Tony, phone=978456321, salary=35000]
[domain=CSE, publications=[JMST, OAJST]]
Technical Staff [staffId=TS111, name=Depp, phone=978736521, salary=25000]
[skills=[C, C++, JAVA]]
Technical Staff [staffId=TS121, name=Angelina, phone=789456123, salary=25000]
[skills=[C, PYTHON, R, HTML]]
Technical Staff [staffId=TS123, name=Cruise, phone=789123456, salary=20000]
[skills=[HTML, JavaScript]]
Contract Staff [staffId=CF100, name=John, phone=Travolta, salary=15000]
[period=1]
Contract Staff [staffId=CF120, name=Arnold, phone=456789123, salary=15000]
[period=2]
Contract Staff [staffId=CF130, name=Kate, phone=123456789, salary=10000]
[period=3]
MENU
1. Teaching Staff Entry
2. Technical Staff Entry
3. Contract Staff Entry
4. Display Staff Details
5. Exit
Enter your choice:
5
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