get code from java doc to work

Programming Questions

clankill3r

get code from java doc to work

in Programming Questions • 4 months ago

I would like to get the example code from java to work:

http://docs.oracle.com/javase/1.4.2/docs/api/java/util/zip/Inflater.html

here it is:

              
Copy code

               // Encode a String into bytes
                String inputString = "blahblahblah??";
                byte[] input = inputString.getBytes("UTF-8");
               

                // Compress the bytes
                byte[] output = new byte[100];
                Deflater compresser = new Deflater();
                compresser.setInput(input);
                compresser.finish();
                int compressedDataLength = compresser.deflate(output);
               

                // Decompress the bytes
                Inflater decompresser = new Inflater();
                decompresser.setInput(output, 0, compressedDataLength);
                byte[] result = new byte[100];
                int resultLength = decompresser.inflate(result);
                decompresser.end();
               

                // Decode the bytes into a String
                String outputString = new String(result, 0, resultLength, "UTF-8");
              
I get:

 Unhandled exception type UnsupportedEncodingException

So i use:

import java.util.zip.*; import java.io.*;

and put everything in a try block but i can get multiple things thrown at me.

How can i do this in a clean way?

And if i need to try catch, why doesnt the javadoc show that?

Replies(1)

PhiLho

Re: get code from java doc to work

4 months ago

"i can get multiple things thrown at me"
This is imprecise at best...

" if i need to try catch, why doesnt the javadoc show that? "
Because they suppose you know how to code in Java?
The JavaDoc always specifies when a method can throw an exception.

For example:
http://docs.oracle.com/javase/6/docs/api/java/lang/String.html#getBytes(java.lang.String)

getBytes

public byte[] getBytes(String charsetName)
                throws UnsupportedEncodingException

Encodes this String into a sequence of bytes using the named charset, storing the result into a new byte array.

The behavior of this method when this string cannot be encoded in the given charset is unspecified. The CharsetEncoder class should be used when more control over the encoding process is required.

Parameters:: charsetName - The name of a supported charset
Returns:: The resultant byte array
Throws:: UnsupportedEncodingException - If the named charset is not supported
Since:: JDK1.1

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