Simple about FutureTask usage

PreLoader.java

package com.xqbase.java;

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.FutureTask;

/**
 * Simple about how to use FutureTask to do some pre-load
 * task.
 *
 * @author Tony He
 */
public class PreLoader {

    private final FutureTask<ProductInfo> future =
            new FutureTask<ProductInfo>(new Callable<ProductInfo>() {
                @Override
                public ProductInfo call() throws DataLoadException {
                    return loadProductInfoFromDB();
                }
            });

    private final Thread thread = new Thread(future);

    public void start() {
        thread.start();
    }

    public ProductInfo get() throws InterruptedException {
        try {
            return future.get();
        } catch (ExecutionException e) {
            Throwable cause = e.getCause();
            if (cause instanceof DataLoadException) {
                throw  (DataLoadException) cause;
            } else {
                throw launderThrowable(cause);
            }
        }
    }

    public static RuntimeException launderThrowable(Throwable t) {
        if (t instanceof RuntimeException) {
            return (RuntimeException) t;
        } else if (t instanceof Error) {
            throw (Error) t;
        } else {
            throw new IllegalStateException("Not unchecked", t);
        }
    }
}