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Thread: JAVA- .class to .java

  1. #1
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    Default JAVA- .class to .java

    hello everyone,

    i'm new to computer science and i was challenged by one of my friends to find out the right code for a class file he gave me.

    I have done some work on it but just need your help, this is not a homework assignment, its just for fun

    if i'm thankful for anyone who helps me

    this is my code

    public class Tpi
    {
        private static final class Mode extends Enum
        {
     
    	private enum Mode
    	{
    		UNKNOWN, COMPILE, INTERPRET
    	}
            private static final Mode $VALUES[];
     
            public static Mode[] values()
            {
                return (Mode[])$VALUES.clone();
            }
     
            public static Mode valueOf(String s)
            {
                return (Mode)Enum.valueOf(Tpi$Mode, s);
            }
     
            static 
            {
                UNKNOWN = new Mode("UNKNOWN", 0);
                COMPILE = new Mode("COMPILE", 1);
                INTERPRET = new Mode("INTERPRET", 2);
                $VALUES = (new Mode[] {
                    UNKNOWN, COMPILE, INTERPRET
                });
            }
     
            private Mode(String s, int i)
            {
                super(s, i);
            }
        }
     
     
        private static final int version = 1;
        private boolean success;
        private String sourceFile;
        private String destinationFile;
        private Mode mode;
        private static final String expectedSourceFileSuffix = ".p";
        private static final String destinationFileSuffix = ".s";
     
        public static void main(String args[])
        {
            Tpi tpi = new Tpi(args);
        }
     
        private Tpi()
        {
        }
     
        public Tpi(String as[])
        {
            success = false;
            mode = Mode.UNKNOWN;
            if(!decodeCommandLine(as))
            {
                return;
            } else
            {
                Parser parser = new Parser(sourceFile);
                success = parser.isSuccessful();
                return;
            }
        }
     
        public boolean isSuccessful()
        {
            return success;
        }
     
        private boolean decodeCommandLine(String as[])
        {
            String s;
            int i = ".p".length();
            System.out.println("Tpi version 1");
            if(as.length != 2)
            {
                System.out.println("Invalid number of arguments.");
                explainArguments();
                return false;
            }
            sourceFile = as[1];
            if(sourceFile.length() < i + 1 || !".p".equals(sourceFile.substring(sourceFile.length() - i)))
            {
                System.out.println("sourcefile must end with .p");
                explainArguments();
                return false;
            }
            s = as[0];
            if(!s.equals("-C"))
            {
                break
            }
            destinationFile = sourceFile.substring(0, sourceFile.length() - i);
            new StringBuilder();
            this;
            destinationFile;
            ".s";
            toString();
            destinationFile;
            mode = Mode.COMPILE;
            System.out.println(new StringBuilder() + "Compiling " + sourceFile + " to " + destinationFile);
            break
            if(s.equals("-I"))
            {
                mode = Mode.INTERPRET;
                System.out.println((new StringBuilder()).append("Interpreting ").append(sourceFile).toString());
            } else
            {
                System.out.println("Invalid mode.");
                explainArguments();
                return false;
            }
            return true;
        }
     
        private void explainArguments()
        {
            System.out.println("Usage: java Tpi mode sourcefile.p");
            System.out.println("where mode is one of the following:");
            System.out.print("-C compiles sourcefile.p");
            System.out.println(", writing assembly code to sourcefile.s");
            System.out.println("-I interprets the contents of sourcefile.p");
        }
    }

    and i have attached the class file.


    Thanx
    Attached Files Attached Files


  2. #2
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    Default Re: JAVA- .class to .java

    Can Anyone HELP?!

  3. #3
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    Default Re: JAVA- .class to .java

    Sorry I'm new too, and I got no clue what that means or dose. lol

    Welcome to the Forums!!

  4. #4
    Super Moderator Json's Avatar
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    Default Re: JAVA- .class to .java

    Have a look at javap - The Java Class File Disassembler or something like JD | Java Decompiler

    // Json

  5. #5
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    Default Re: JAVA- .class to .java

    okay, thank you so much for your help, it is much better than before

    thanx

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