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Difference between compile-time polymorphism and runtime polymorphism
Polymorphism is one of the most important OOPs concepts. Its is a concept by which we can perform single task in multiple ways. There are two types of polymorphism one is Compile-time polymorphism and another is run-time polymorphism.
Method overloading is the example of compile time polymorphism and method overriding is the example of run-time polymorphism.
| Sr. No. | Key | Compile-time polymorphism | Runtime polymorphism |
|---|---|---|---|
| 1 | Basic | Compile time polymorphism means binding is occuring at compile time | R un time polymorphism where at run time we came to know which method is going to invoke |
| 2 | Static/DynamicBinding | It can be achieved through static binding | It can be achieved through dynamic binding |
| 4. | Inheritance | Inheritance is not involved | Inheritance is involved |
| 5 | Example | Method overloading is an example of compile time polymorphism | Method overriding is an example of runtime polymorphism |
Example of Compile-time Polymorphism
<span class="kwd">public</span><span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">Main</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
</span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">static</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> main</span><span class="pun">(</span><span class="typ">String</span><span class="pln"> args</span><span class="pun">[])</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
</span><span class="typ">CompileTimePloymorphismExample</span><span class="pln"> obj </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">CompileTimePloymorphismExample</span><span class="pun">();</span><span class="pln">
obj</span><span class="pun">.</span><span class="pln">display</span><span class="pun">();</span><span class="pln">
obj</span><span class="pun">.</span><span class="pln">display</span><span class="pun">(</span><span class="str">"Polymorphism"</span><span class="pun">);</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span><span class="kwd">class</span><span class="pln"> </span><span class="typ">CompileTimePloymorphismExample</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
</span><span class="kwd">void</span><span class="pln"> display</span><span class="pun">()</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
</span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="str">"In Display without parameter"</span><span class="pun">);</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span><span class="kwd">void</span><span class="pln"> display</span><span class="pun">(</span><span class="typ">String</span><span class="pln"> </span><span class="kwd">value</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
</span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="str">"In Display with parameter"</span><span class="pln"> </span><span class="pun">+</span><span class="pln"> </span><span class="kwd">value</span><span class="pun">);</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span><span class="pun">}</span>
Example of Runtime Polymorphism
<span class="kwd">public</span><span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">Main</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
</span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">static</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> main</span><span class="pun">(</span><span class="typ">String</span><span class="pln"> args</span><span class="pun">[])</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
</span><span class="typ">RunTimePolymorphismParentClassExample</span><span class="pln"> obj </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">RunTimePolymorphismSubClassExample</span><span class="pun">();</span><span class="pln">
obj</span><span class="pun">.</span><span class="pln">display</span><span class="pun">();</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span><span class="kwd">class</span><span class="pln"> </span><span class="typ">RunTimePolymorphismParentClassExample</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
</span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> display</span><span class="pun">()</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
</span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="str">"Overridden Method"</span><span class="pun">);</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">RunTimePolymorphismSubClassExample</span><span class="pln"> </span><span class="kwd">extends</span><span class="pln"> </span><span class="typ">RunTimePolymorphismParentExample</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
</span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> display</span><span class="pun">()</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
</span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="str">"Overriding Method"</span><span class="pun">);</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span><span class="pun">}</span> 
Updated on: 2023-09-12T09:54:51+05:30
37K+ Views
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