About decompilers

I just found out a perfect decompiler for Java..And a question arose in my mind - Can't something be done against those decompilers?

[147 byte] By [Glammya] at [2007-10-2 10:32:45]

«« visibility of JSP
»» KVM porting on Arm-linux

# 1

no, anything that can be executed can be decompiled.

jwentinga at 2007-7-13 2:17:44 >

top of Java-index,Developer Tools,Java Compiler...

# 2

Well, some obfuscators do things like unrolling loops in ways that cannot easily be reversed.

tschodta at 2007-7-13 2:17:44 >

# 3

doesn't matter. You can still get readable source out of them, just structured differently from the source you put into the compiler.

After all, for (int i=0; i<2; i++) {

x[i] = i;

}

is functionally identical to

x[0] = 0;

x[1] = 1;

x[2] = 2;

except the latter executes a bit faster and uses sizeof(int) less memory.

jwentinga at 2007-7-13 2:17:44 >

# 4

that should be x<=2 of course ;)

jwentinga at 2007-7-13 2:17:44 >

# 5

I was referring to [url= http://today.java.net/pub/a/today/2004/10/22/obfuscation.html#Code_Manglers]the use of Duff's Device in obfuscation[/url].

tschodta at 2007-7-13 2:17:44 >

# 6

doesn't matter. If you can interpret the compiled code to execute it you can create new source from it even if that new source is not the same as the original.

jwentinga at 2007-7-13 2:17:44 >

Java programming resources: FAQs, tutorials, compiler and browser download sites, documentation, books lists, IDEs, etc.

About decompilers

Developer Tools New Topic

Developer Tools Hot Topic

Developer Tools

All Classified