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Java example source code file (AdaDeltaUpdater.java)

This example Java source code file (AdaDeltaUpdater.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

adadeltaaggregator, adadeltaupdater, baseupdater, gradientupdater, indarray, layer, override, updateraggregator

The AdaDeltaUpdater.java Java example source code

package org.deeplearning4j.nn.updater;

import org.deeplearning4j.nn.api.Layer;
import org.deeplearning4j.nn.api.Updater;
import org.deeplearning4j.nn.updater.aggregate.UpdaterAggregator;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.learning.AdaDelta;
import org.nd4j.linalg.learning.GradientUpdater;

 * @author Adam Gibson
public class AdaDeltaUpdater extends BaseUpdater {

    public void init() {


    public GradientUpdater init(String variable, INDArray gradient, Layer layer) {
        GradientUpdater updater = updaterForVariable.get(variable);
        if (updater == null) {
            updater = new AdaDelta(layer.conf().getLayer().getRho());

        return updater;

    public UpdaterAggregator getAggregator(boolean addThis){
        AdaDeltaAggregator ag = new AdaDeltaAggregator();
        if(addThis) ag.aggregate(this);
        return ag;

    protected static class AdaDeltaAggregator extends BaseUpdater.UpdaterAggregatorImpl {
        public Updater getUpdater() {
            return setUpdaterState(new AdaDeltaUpdater());

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