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copied!<p>I spent some time this year trying out various Java obfuscators, and I found one to be miles ahead of the rest: <a href="http://www.sable.mcgill.ca/JBCO/" rel="noreferrer">JBCO</a>. It's unfortunately a bit cumbersome to set up, and has no GUI, but in terms of the level of obfuscation it produces, it is unparalleled. You try feeding it a simple loop, and if your decompiler doesn't crash trying to load it, you will see something like this:</p> <pre><code> if(i < ll1) goto _L6; else goto _L5 _L5: char ac[] = run(stop(lI1l)); l7 = (long)ac.length << 32 & 0xffffffff00000000L ^ l7 & 0xffffffffL; if((int)((l7 & 0xffffffff00000000L) >> 32) != $5$) { l = (long)III << 50 & 0x4000000000000L ^ l & 0xfffbffffffffffffL; } else { for(l3 = (long)III & 0xffffffffL ^ l3 & 0xffffffff00000000L; (int)(l3 & 0xffffffffL) < ll1; l3 = (long)(S$$ + (int)(l3 & 0xffffffffL)) ^ l3 & 0xffffffff00000000L) { for(int j = III; j < ll1; j++) { l2 = (long)actionevent[j][(int)(l3 & 0xffffffffL)] & 65535L ^ l2 & 0xffffffffffff0000L; l6 = (long)(j << -351) & 0xffffffffL ^ l6 & 0xffffffff00000000L; l1 = (long)((int)(l6 & 0xffffffffL) + j) & 0xffffffffL ^ l1 & 0xffffffff00000000L; l = (long)((int)(l1 & 0xffffffffL) + (int)(l3 & 0xffffffffL)) << 16 & 0xffffffff0000L ^ l & 0xffff00000000ffffL; l = (long)ac[(int)((l & 0xffffffff0000L) >> 16)] & 65535L ^ l & 0xffffffffffff0000L; if((char)(int)(l2 & 65535L) != (char)(int)(l & 65535L)) { l = (long)III << 50 & 0x4000000000000L ^ l & 0xfffbffffffffffffL; } } } } </code></pre> <p>You didn't know Java had goto's? Well, the JVM supports them =)</p>

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