创建 Java 小程序以在浏览器中启动
[英]Creating a Java Applet to Launch in Browser
问题描述
I am working on a homework assignment that is requiring me to create a basic applet that runs in a browser.
我正在完成一项家庭作业，该作业要求我创建一个在浏览器中运行的基本小程序。 I already know that the applets have been deprecated, so I know that this probably will not work with current browsers.我已经知道小程序已被弃用，所以我知道这可能不适用于当前的浏览器。
This is my Java code:这是我的Java代码：
import java.applet.Applet;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JApplet;
import javax.swing.JLabel;
public class SimpleJavaApplet extends JApplet{
public void paint(Graphics g) {
g.drawString("Hello World!", 80, 80);
g.drawString("Blah!", 100, 100);
}
}
This is my HTML code:这是我的 HTML 代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>A Short Test</title>
</head>
<body>
<title>Test Applet</title>
<applet code="SimpleJavaApplet.class" width = "200" height = "50">
</applet>
<h1>Test Test Test</h1>
</body>
</html>
What I was hoping would happen is that a browser would launch and it would show up with the HTML, but the only think I have been able to get to run is the AppletViewer.我希望会发生的是浏览器会启动并显示 HTML，但我唯一能够运行的想法是 AppletViewer。 I am wondering if this is even possible anymore and if I should just let my professor know that.我想知道这是否还有可能，我是否应该让我的教授知道这一点。
Any ideas will be greatly appreciated.任何想法将不胜感激。
Edit: Just to make things clearer, I am trying to run this code so it runs through a browser and not just the AppletViewer.编辑：为了让事情更清楚，我正在尝试运行此代码，以便它通过浏览器运行，而不仅仅是 AppletViewer。
2 个解决方案
解决方案1
2 已采纳 2019-11-24 21:44:40
Neither Chrome nor Firefox are no longer supported NPAPI. Chrome 和 Firefox 都不再支持 NPAPI。
Java and Firefox Browser Java 和 Firefox 浏览器
Firefox no longer provides NPAPI support (technology required for Java applets) As of September, 2018, Firefox no longer offers a version which supports NPAPI, the technology required to run Java applets.
Java and Google Chrome Browser Java 和 Google Chrome 浏览器
Chrome no longer supports NPAPI (technology required for Java applets) The Java Plugin for web browsers relies on the cross-platform plugin architecture NPAPI, which had been supported by all major web browsers for over a decade.
Finally Java Applets and Java Web start were completely removed from Oracle Java 11 SE.最后，Java Applets 和 Java Web start 从 Oracle Java 11 SE 中完全删除。
Java 11 SE Release Notes Java 11 SE 发行说明
The deployment stack, required for Applets and Web Start Applications, was deprecated in JDK 9 and has been removed in JDK 11.
and和
The appletviewer tool was deprecated in JDK 9 (see JDK-8074165) and removed in this release.
So if you're using Java 9 or below the appletviewer is available or if you able to download and install an ancient Chrome (less than 45) you can run that applet but Java 11 or above there is no alternative solution just the migration.因此，如果您使用的是 Java 9 或更低版本，appletviewer 可用，或者如果您能够下载并安装一个古老的 Chrome（小于 45），您可以运行该小程序，但 Java 11 或更高版本没有替代解决方案，只有迁移。
解决方案2
1 2019-11-24 21:31:40
I'm not sure what you are trying to do, but here some hints.我不确定你要做什么，但这里有一些提示。 If you want to test some applets install an old jdk 1.6.x or Java 8 (avoid jdk 7).如果您想测试一些小程序，请安装旧的 jdk 1.6.x 或 Java 8（避免使用 jdk 7）。 Use Firefox esr 52.9使用 Firefox esr 52.9
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