Print Page - BitcoinJ Simple Error. java.lang.NoClassDefFoundError

Title: BitcoinJ Simple Error. java.lang.NoClassDefFoundError
Post by: Anonymous on December 13, 2011, 10:15:24 PM

Okay. When running my app that uses the bitcoinj jar file, I run into the following error:

Code:

Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
	at com.google.bitcoin.core.Wallet.<clinit>(Wallet.java:37)
	at com.macintosh264.bitcoinproc.BitcoinHandler.openWallet(BitcoinHandler.java:11)
	at com.macintosh264.bitcoinproc.Application.loadBitcoin(Application.java:40)
	at com.macintosh264.bitcoinproc.Application.launch(Application.java:23)
	at com.macintosh264.bitcoinproc.Application.applicationLoop(Application.java:10)
	at com.macintosh264.bitcoinproc.BPEMain.main(BPEMain.java:12)
Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory
	at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
	... 6 more

And the code I have is this

Code:

package com.macintosh264.bitcoinproc;
import java.io.*;
import com.google.bitcoin.core.Wallet;
import com.google.bitcoin.core.*;
public class BitcoinHandler {
	public boolean testnet = false;
	public void openWallet(String walletName) {
		Wallet wallet;
		File walletFile = FileLocationManager.bitcoinFile(walletName, "wallet");
		try {
		    wallet = Wallet.loadFromFile(walletFile);
		} catch (IOException e) {
			wallet = new Wallet(this.getParams());
		    wallet.keychain.add(new ECKey());
		    try {
				wallet.saveToFile(walletFile);
			} catch (IOException e1) {
				// TODO Auto-generated catch block
				e1.printStackTrace();
			}
		}

	}
	private NetworkParameters getParams() {
		return this.testnet ? NetworkParameters.testNet() : NetworkParameters.prodNet();
	}
}

And it is called by this

Code:

BitcoinHandler bh = new BitcoinHandler();
bh.testnet = true;
bh.openWallet("wallet");

And one last thing

Code:

File walletFile = FileLocationManager.bitcoinFile(walletName, "wallet");

Code:

return new File("data/bitcoin/" + name + "." + extension);

Thanks,
macintosh264

Title: Re: [1 BTC Bounty] BitcoinJ Simple Error. java.lang.NoClassDefFoundError
Post by: ovidiusoft on December 13, 2011, 10:26:43 PM

You are missing this: http://www.slf4j.org/ . The dependency is documented on the BitcoinJ wiki here: https://code.google.com/p/bitcoinj/wiki/GettingStarted .

Title: Re: [1 BTC Bounty] BitcoinJ Simple Error. java.lang.NoClassDefFoundError
Post by: Anonymous on December 13, 2011, 10:29:18 PM

Quote from: ovidiusoft on December 13, 2011, 10:26:43 PM

You are missing this: http://www.slf4j.org/ . The dependency is documented on the BitcoinJ wiki here: https://code.google.com/p/bitcoinj/wiki/GettingStarted .

Thanks! (I didn't even see the wiki ;D)
What's your address.

Title: Re: [1 BTC Bounty] BitcoinJ Simple Error. java.lang.NoClassDefFoundError
Post by: Anonymous on December 13, 2011, 10:30:56 PM

Quote from: ovidiusoft on December 13, 2011, 10:26:43 PM

You are missing this: http://www.slf4j.org/ . The dependency is documented on the BitcoinJ wiki here: https://code.google.com/p/bitcoinj/wiki/GettingStarted .

How do I add this to my eclipse project.

Title: Re: BitcoinJ Simple Error. java.lang.NoClassDefFoundError
Post by: ovidiusoft on December 13, 2011, 10:34:35 PM

PM'ed my address. I am sorry, I don't know Eclipse that well, I think there is a Maven plugin for it, but not much more.

Title: Re: BitcoinJ Simple Error. java.lang.NoClassDefFoundError
Post by: ovidiusoft on December 13, 2011, 10:36:46 PM

I have received the bounty from OP. Thank you!

Title: Re: BitcoinJ Simple Error. java.lang.NoClassDefFoundError
Post by: Anonymous on December 13, 2011, 10:42:01 PM

Okay, now one more problem.

org.bouncycastle.util.encoders.Hex is missing. Where do I get that?

Title: Re: BitcoinJ Simple Error. java.lang.NoClassDefFoundError
Post by: ovidiusoft on December 13, 2011, 10:52:56 PM

I think it's here: http://www.bouncycastle.org/ . But you should probably use Maven to install any other dependencies.

Bitcoin Forum

Bitcoin => Project Development => Topic started by: Anonymous on December 13, 2011, 10:15:24 PM