51 lines
1.4 KiB
Java
51 lines
1.4 KiB
Java
// typeinfo/Position.java
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// (c)2016 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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import java.util.*;
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class EmptyTitleException extends RuntimeException {}
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class Position {
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private String title;
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private Person person;
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public Position(String jobTitle, Person employee) {
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setTitle(jobTitle);
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setPerson(employee);
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}
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public Position(String jobTitle) {
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this(jobTitle, null);
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}
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public String getTitle() { return title; }
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public void setTitle(String newTitle) {
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// Throws EmptyTitleException if newTitle is null:
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title = Optional.ofNullable(newTitle)
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.orElseThrow(EmptyTitleException::new);
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}
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public Person getPerson() { return person; }
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public void setPerson(Person newPerson) {
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// Uses empty Person if newPerson is null:
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person =
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Optional.ofNullable(newPerson).orElse(new Person());
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}
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@Override
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public String toString() {
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return "Position: " + title + ", Employee: " + person;
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}
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public static void main(String[] args) {
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System.out.println(new Position("CEO"));
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System.out.println(new Position("Programmer",
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new Person("Arthur", "Fonzarelli")));
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try {
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new Position(null);
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} catch(Exception e) {
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System.out.println("caught " + e);
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}
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}
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}
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/* Output:
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Position: CEO, Employee: <Empty>
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Position: Programmer, Employee: Arthur Fonzarelli
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caught EmptyTitleException
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*/
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