【Java机器学习】入门必看，轻松掌握十大热门库实战技巧

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引言

Java作为一种强范例的面向东西编程言语，因其牢固性跟跨平台特点在软件开辟范畴广受欢送。跟着大年夜数据跟人工智能的崛起，Java在呆板进修范畴的利用也日益广泛。本文将为你介绍Java呆板进修的入门知识，并具体介绍十大年夜热点库的实战技能，帮助你轻松控制Java呆板进修。

Java呆板进修基本

1. Java情况搭建

在停止Java呆板进修之前，你须要搭建Java开辟情况。以下是搭建Java开辟情况的步调：

下载并安装Java Development Kit（JDK）
设置情况变量
抉择合适的集成开辟情况（IDE），如Eclipse、IntelliJ IDEA等

2. Java编程基本

进修Java呆板进修须要控制以下Java编程基本：

数据范例跟变量
把持流程（if-else、for、while等）
类跟东西
面向东西编程（OOP）原则
异常处理

十大年夜热点Java呆板进修库实战技能

1. Deeplearning4j

Deeplearning4j是一个开源的分布式深度进修库，支撑多种深度进修架构。

实战技能：利用Deeplearning4j实现卷积神经收集（CNN）停止图像分类。

// 示例代码
NeuralNetConfiguration conf = new NeuralNetConfiguration.Builder()
    .seed(12345)
    .updater(new Adam(0.001))
    .list()
    .layer(0, new ConvolutionLayer.Builder(5, 5)
        .nIn(3)
        .nOut(20)
        .stride(1, 1)
        .activation(Activation.RELU)
        .build())
    .layer(1, new SubsamplingLayer.Builder(PoolingType.MAX)
        .kernelSize(2, 2)
        .stride(2, 2)
        .build())
    .layer(2, new DenseLayer.Builder().nOut(50)
        .activation(Activation.RELU)
        .build())
    .layer(3, new OutputLayer.Builder(LossFunctions.LossFunction.NEGATIVELOGLIKELIHOOD)
        .nOut(outputNum)
        .activation(Activation.SOFTMAX)
        .build())
    .setInputType(InputType.convolutionalFlat(28, 28, 3))
    .build();

MultiLayerNetwork model = new MultiLayerNetwork(conf);
model.init();

2. Weka

Weka是一个用于数据发掘任务的呆板进修算法凑集。

实战技能：利用Weka停止数据预处理、分类、回归、聚类等任务。

// 示例代码
String[] options = new String[]{"-U"};
Classifier cls = (Classifier) weka.core.SerializationHelper.read("model.model");
Evaluation eval = new Evaluation(iris.data);
eval.evaluateModel(cls, iris.data);
System.out.println(eval.toSummaryString("\nResults\n======\n", false));

3. Neuroph

Neuroph是一个用于神经收集开辟的开源Java框架。

实战技能：利用Neuroph创建跟练习神经收集。

”`java // 示例代码 Network neuralNetwork = new FeedforwardNetwork(); neuralNetwork.addLayer(new Layer(2)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); neuralNetwork.addLayer(new Layer(1)); ne