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posts/java/about-final.mdx

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@@ -115,8 +115,10 @@ Constant pool:
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#8 = Utf8 x
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#9 = String #10 // y
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#10 = Utf8 y
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#11 = InvokeDynamic #0:#12 // #0:makeConcatWithConstants:(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
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#12 = NameAndType #13:#14 // makeConcatWithConstants:(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
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#11 = InvokeDynamic #0:#12 // #0:makeConcatWithConstants:
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// (Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
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#12 = NameAndType #13:#14 // makeConcatWithConstants:
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// (Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
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#13 = Utf8 makeConcatWithConstants
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#14 = Utf8 (Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
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#15 = String #16 // xy
@@ -132,7 +134,8 @@ Constant pool:
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#25 = Utf8 SourceFile
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#26 = Utf8 Test.java
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#27 = Utf8 BootstrapMethods
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#28 = MethodHandle 6:#29 // REF_invokeStatic java/lang/invoke/StringConcatFactory.makeConcatWithConstants:
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#28 = MethodHandle 6:#29 // REF_invokeStatic
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// java/lang/invoke/StringConcatFactory.makeConcatWithConstants:
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// (Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;
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// Ljava/lang/invoke/MethodType;Ljava/lang/String;
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// [Ljava/lang/Object;)Ljava/lang/invoke/CallSite;
@@ -179,7 +182,9 @@ Constant pool:
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5: astore_1
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6: aload_0
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7: aload_1
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8: invokedynamic #11, 0 // InvokeDynamic #0:makeConcatWithConstants:(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
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8: invokedynamic #11, 0 // InvokeDynamic
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// #0:makeConcatWithConstants:
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// (Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
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13: areturn
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LineNumberTable:
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line 6: 0
@@ -284,7 +289,6 @@ final 키워드는 객체의 참조가 변경되지 않음을 보장하지만, <
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<BlueText><span style={{ fontSize: '1.5rem', }}>A. </span></BlueText>
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`final` 을 사용하면 해당 메서드를 **오버라이딩 할 수 없게** 만든다. 메서드를 `final` 로 선언하면서 해당 메서드가 하위 클래스에서 오버라이딩 하지 않게 강제할 수 있으므로,
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<BlueText>특정 메서드의 동작이 변경되지 않도록 보장하여 코드의 무결성을 유지할 수 있다.</BlueText>
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그렇다보니, 상위 클래스에서 정의한 메서드 동작이 항상 동일하게 유지되면서 코드를 이해하기 쉬워진다.

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