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Editorial Team
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Asked: 2026-05-31T21:27:24+00:00

When searching the web it is easy to find this way to print out

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When searching the web it is easy to find this way to print out Java bytecode:

http://www.ibm.com/developerworks/ibm/library/it-haggar_bytecode/

What I could not find is if there is a standard representation of Java bytecode as a string and if there is a tool to compile string representation of Java bytecode into binary bytecode.

In .NET the equivalent tool is ilasm.exe. Is there something like this for Java and is it standard?

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1 Answer

  1. Editorial Team

    There are tools to do this but they aren’t part of the standard. You have two options:

    • You can use the Java(tm) Bytecode Assembler or Jasmin. They take a text file as input and compile that to a class file.
    • You can use a library like ASM to build bytecode using Java code. This the usual approach when you read existing bytecode and want to transform it.
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