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52 changes: 52 additions & 0 deletions source/ch6_definingclasses.ptx
Original file line number Diff line number Diff line change
Expand Up @@ -423,6 +423,58 @@ public Fraction(Integer num, Integer den) {
</code>
</program>
</listing>

<exercise label="java_game_character_parsons">
<statement>
<p>
Rearrange the blocks to create a <c>Player</c> class with a <c>private int health</c> instance variable. Implement a getter and a setter that validates health points to remain within <c>0</c> and <c>100</c>.
</p>
</statement>
<blocks>
<block order="1">
<choice correct="yes">
<cline>public class Player {</cline>
<cline> private int health;</cline>
</choice>
<choice correct="no">
<cline>public class Player {</cline>
<cline> public int health;</cline>
</choice>
</block>
<block order="2">
<choice correct="yes">
<cline> public int getHealth() {</cline>
<cline> return health;</cline>
<cline> }</cline>
</choice>
<choice correct="no">
<cline> public void getHealth() {</cline>
<cline> return health;</cline>
<cline> }</cline>
</choice>
</block>
<block order="3">
<choice correct="yes">
<cline> public void setHealth(int health) {</cline>
<cline> if (health &gt;= 0 &amp;&amp; health &lt;= 100) {</cline>
<cline> this.health = health;</cline>
<cline> }</cline>
<cline> }</cline>
</choice>
<choice correct="no">
<cline> public void setHealth(int health) {</cline>
<cline> if (health &gt;= 0 &amp;&amp; health &lt;= 100) {</cline>
<cline> health = health;</cline>
<cline> }</cline>
<cline> }</cline>
</choice>
</block>
<block order="4">
<cline>}</cline>
</block>
</blocks>
</exercise>

</section>

<section xml:id="methods">
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