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Thread: Conversion of c# function into java

  1. #1
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    Default Conversion of c# function into java


    I am new to java. I have written a function in C#,how can i convert it into Java.

      public AsymmetricKey readKey(String filename)
            StreamReader reader = new StreamReader(filename);
            String modulus64 = reader.readLine();
            String exponent64 = reader.readLine();
            byte[] modulusBytes = base64Decode(modulus64);
            byte[] exponentBytes = base64Decode(exponent64);
            BigInteger modulus = new BigInteger(modulusBytes);
            BigInteger exponent = new BigInteger(exponentBytes);
            AsymmetricKey key = new AsymmetricKey(modulus, exponent);
            return key;
    //AsymmetricKey class is like:
    public class AsymmetricKey
            private BigInteger modulus;
            private BigInteger exponent;
            public AsymmetricKey(BigInteger modulus, BigInteger exponent) {
                this.modulus = modulus;
                this.exponent = exponent;
            public BigInteger getModulus() {
                return modulus;
            public BigInteger getExponent() {
                return exponent;

    Please help.


  2. #2
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    Default Re: Conversion of c# function into java

    Since you desire to learn Java, you might compare what you've written to tutorials you find when searching "Java encryption," "Java public key encryption," and similar. When you've coded some Java and get stuck or need help, come back with the code and questions.

  3. The Following User Says Thank You to GregBrannon For This Useful Post:

    Ada Lovelace (July 12th, 2014)

  4. #3
    Member Ada Lovelace's Avatar
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    Default Re: Conversion of c# function into java

    C# and Java are very similar in syntax - but there are important differences. I
    do not know your level of Java skill, but it also may be helpful in the long run
    to look at the differences between the two languages. If you have come from a very
    strong C# background - the overall look and feel should be very comfortable - but
    it can be easy to mistake a C# logic for a Java one.

    * There is no manual pointers in Java - they do exist in C# using the unsafe label.
    * C# compiles to MSIL where are Java compiles to byte-code.
    * Java is multi-platform where is C# is generally tied to Windows and .NET (although the Mono project has come a long way)
    * Java does not use references at all (expect in arrays) - C# uses the 'ref' keyword -remember everything in Java is passed by value

    Wishes Ada xx
    If to Err is human - then programmers are most human of us all.
    "The Analytical Engine offers a new, a vast, and a powerful language . . .
    for the purposes of mankind
    Augusta Ada Byron, Lady Lovelace (1851)

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