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java Programming Glossary: iconst_1Is String Literal Pool a collection of references to the String Object, Or a collection of Objects http://stackoverflow.com/questions/11700320/is-string-literal-pool-a-collection-of-references-to-the-string-object-or-a-co Byte code ldc #2 String abc astore_1 one ldc #3 String abc iconst_1 invokevirtual #4 Method String.substring I Ljava lang String..
Instructions reordering in Java JVM http://stackoverflow.com/questions/12554570/instructions-reordering-in-java-jvm r1 4 ifne 12 compare r1 with 0 7 aload_0 read this 8 iconst_1 constant 1 9 putfield #6 put 1 into hash w1 12 aload_0 read.. read h 6 ifne 16 compare h with 0 9 aload_0 read this 10 iconst_1 constant 1 11 dup constant again 12 istore_1 store 1 into..
Java OutOfMemoryError strange behaviour http://stackoverflow.com/questions/13531004/java-outofmemoryerror-strange-behaviour 6 newarray long 8 astore_2 9 iinc 1 1 12 iload_1 13 iconst_1 14 if_icmplt 5 17 iload_0 18 newarray long 20 astore_1 21 return..
How to tell why a file deletion fails in Java? http://stackoverflow.com/questions/1729049/how-to-tell-why-a-file-deletion-fails-in-java
Comparing strings with == which are declared final in Java http://stackoverflow.com/questions/19418427/comparing-strings-with-which-are-declared-final-in-java 28 aload_3 29 ldc #9 String string 31 if_acmpne 38 34 iconst_1 35 goto 39 38 iconst_0 39 invokevirtual #10 Method java io PrintStream.println.. 6 aload_3 7 ldc #2 String string 9 if_acmpne 16 12 iconst_1 13 goto 17 16 iconst_0 17 invokevirtual #4 Method java io PrintStream.println..
Is 1/0 a legal Java expression? http://stackoverflow.com/questions/2934063/is-1-0-a-legal-java-expression main java.lang.String Code 0 iconst_5 1 istore_1 i 5 2 iconst_1 3 iconst_0 4 idiv 5 istore_2 j 1 0 6 iconst_4 7 istore_3 k 4..
Which is more effective: if (null == variable) or if (variable == null)? http://stackoverflow.com/questions/3021195/which-is-more-effective-if-null-variable-or-if-variable-null aload_1 load variable 4 ifnonnull 11 check if it's null 7 iconst_1 push 1 8 goto 12 11 iconst_0 push 0 12 istore_2 store For.. 4 aload_1 load variable 5 if_acmpne 12 check if equal 8 iconst_1 push 1 9 goto 13 12 iconst_0 push 0 13 istore_2 store As..
http://stackoverflow.com/questions/3110014/is-this-valid-java 10 areturn public static void main java.lang.String Code 0 iconst_1 1 anewarray #3 class java lang String 4 dup 5 iconst_0 6 ldc.. Method f Ljava util List Ljava lang String 15 astore_1 16 iconst_1 17 anewarray #4 class java lang Integer 20 dup 21 iconst_0 22..
Should Java methods be static by default? http://stackoverflow.com/questions/3346764/should-java-methods-be-static-by-default never used as we can see here 0 iload_1 1 iload_2 2 imul 3 iconst_1 4 iadd 5 ireturn See there's no iload_0 It has been loaded unnecessarily... 0 and 1 as we can see here 0 iload_0 1 iload_1 2 imul 3 iconst_1 4 iadd 5 ireturn Conclusion From the code design angle it makes..
Why are compiled Java class files smaller than C compiled files? http://stackoverflow.com/questions/4838221/why-are-compiled-java-class-files-smaller-than-c-compiled-files print lo then its bytecode is 0 iconst_0 1 istore_0 lo 0 2 iconst_1 3 istore_1 hi 1 4 iload_1 5 sipush 10000 8 if_icmpge 26 while..
Accessing Java static final ivar value through reflection http://stackoverflow.com/questions/850148/accessing-java-static-final-ivar-value-through-reflection 33 aload 4 35 iload 6 37 aaload 38 astore 7 40 aload 7 42 iconst_1 43 invokevirtual #6 Method java lang reflect Field.setAccessible..
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