[[Tableofcontents]] == 강의록 == * [http://www.slideshare.net/novathinker/1-java-key Java-Chapter 1] * [http://www.slideshare.net/novathinker/2-runtime-data-areas Java-Chapter 2] * [http://www.kandroid.org/board/data/board/conference/file_in_body/1/8th_kandroid_application_framework.pdf Android] == 강의 내용 == === ByteCode.java === {{{ // Compile // notepad++ 에서 UTF8(BOM 없음) 선택후 다음과 같이 cmd에서 컴파일 javac -encoding utf8 ByteCode.java }}} {{{ // Decompile javap -c ByteCode.class }}} {{{ public class ByteCode{ public ByteCode() { System.out.println("hello"); } public void methodOperandStack(){ int a, b, c; a = 5; b = 1; c = a + b; } } }}} ==== 2차 수정 ==== {{{ public class ByteCode{ public ByteCode() { System.out.println("hello"); } public void methodOperandStack(){ try{ int a, b, c; a = 5; b = 1; c = a + b; } catch(Exception e){ } } } }}} {{{ // Compile 결과 Compiled from "ByteCode.java" public class ByteCode { public ByteCode(); Code: 0: aload_0 1: invokespecial #1 // Method java/lang/Object."": ()V 4: getstatic #2 // Field java/lang/System.out:Ljava/ io/PrintStream; 7: ldc #3 // String hello 9: invokevirtual #4 // Method java/io/PrintStream.printl n:(Ljava/lang/String;)V 12: return public void methodOperandStack(); Code: 0: iconst_5 1: istore_1 2: iconst_1 3: istore_2 4: iload_1 5: iload_2 6: iadd 7: istore_3 8: goto 12 11: astore_1 12: return Exception table: from to target type 0 8 11 Class java/lang/Exception } }}} ==== 3차 수정 ==== {{{ public class ByteCode{ public ByteCode() { System.out.println("hello"); } private static final boolean optimize = false; private final void methodOperandStack(){ if(optimize){ int a, b, c; a = 5; b = 1; c = a + b; } } } }}} {{{ // Compile 결과 Compiled from "ByteCode.java" public class ByteCode { public ByteCode(); Code: 0: aload_0 1: invokespecial #1 // Method java/lang/Object."": ()V 4: getstatic #2 // Field java/lang/System.out:Ljava/ io/PrintStream; 7: ldc #3 // String hello 9: invokevirtual #4 // Method java/io/PrintStream.printl n:(Ljava/lang/String;)V 12: return } }}}