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Java

By Godfrey Nolan

ISBN-10: 1430207396

ISBN-13: 9781430207399

ISBN-10: 1430254696

ISBN-13: 9781430254690

Both Java and .NET use the assumption of a "virtual machine," or VM. And whereas VMs are priceless for a few reasons, they undermine the safety of your resource code, simply because construction should be reversed, or decompiled. Which makes this distinctive e-book super invaluable: you need to comprehend decompilation, to correctly safeguard your highbrow property.

for instance, how safe is your code when you run an obfuscator? The publication will resolution questions like this, and supply extra thorough information regarding Java byte codes and the Java digital laptop (JVM) than the other ebook out there. This ebook redresses the imbalance by means of offering insights into the good points and obstacles of ultra-modern decompilers and obfuscators, and delivering a close examine what JVMs truly do.

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Godfrey Nolan's Decompiling Java PDF

Either Java and . web use the assumption of a "virtual machine," or VM. And whereas VMs are worthwhile for a few reasons, they undermine the safety of your resource code, simply because construction should be reversed, or decompiled. Which makes this extraordinary publication super valuable: you need to comprehend decompilation, to correctly safeguard your highbrow estate.

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Writer { public Person() { Geek g = new Geek(this); Author t = new Author(this); } public public public public } 36 void void void void code() { I* ••••. *I } earnmore() { I* ..... • *I } earnless() { I* •••.. iprog = iprog; iprog. Writer. When you run classtoxml against the class files, you get the following information in the interfaces section. class has no field information. This is simply because the classfile has no instance variables. As a result, you need to make some simple changes to the original code to declare some variables in the classfile before anything will show up in the classfile fields (see Listing 2-9).

Users can define their own attribute types, but they're irrelevant to the current discussion. 1 ConstantValue 2 8 The attribute for the first field is a constant that can be found in constant_pool[8], a string, which, in turn, points at the string Hello. CONSTANT_String 41 CONSTANT_Utf8 Hello, You have now decompiled the first field into its original format: static final String s = "Hello, "; 41 Chapter2 Methods And now, for the most important part of the classiDe, the methods.

Writer. When you run classtoxml against the class files, you get the following information in the interfaces section. class has no field information. This is simply because the classfile has no instance variables. As a result, you need to make some simple changes to the original code to declare some variables in the classfile before anything will show up in the classfile fields (see Listing 2-9). In this listing, you also make them static and final to force a ConstantValue field attribute. Listing 2-9.

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Decompiling Java by Godfrey Nolan


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