Applet的麻烦 - 的NoClassDefFoundError [英] Applet trouble - NoClassDefFoundError
问题描述
我知道有这些职位的一百万，但他们都没有帮我所以这里有云：我想部署一个非常，非常简单的小程序将无法正常加载。
我的HTML：
＆LT; HTML和GT;
＆LT; HEAD＆GT;
＆LT; META HTTP-EQUIV =Content-Type的内容的text / html;字符集= UTF-8＆GT;
＆LT; /头＆GT;
＆LT;身体GT;
＆LT;小程序code =SimpleApplet.class
宽度=320HEIGHT =100＆GT;＆下; /小程序＆GT;
＆LT; /身体GT;
＆LT; / HTML＆GT;
我的Java：
封装测试;进口的javax.swing *。公共类SimpleApplet扩展JApplet的{
公共无效的init（）{
尝试{
SwingUtilities.invokeAndWait（新的Runnable（）{
公共无效的run（）{
JLabel的LBL =新的JLabel（的Hello World）;
加（LBL）;
}
}）;
}
赶上（例外五）{
的System.out.println（E）;
}
}
}
这两个文件都位于同一目录
/家庭/ ME /工作区/ myProject的/斌/测试
如果我通过Eclipse运行其自己的小程序，它工作正常。当我打开网页出现错误
java.lang.NoClassDefFoundError的：SimpleApplet（错误的名称：测试/ SimpleApplet）
该错误将表明我没有正确放置或命名的东西。然而，试图在
＆LT;小程序code =测试/ SimpleApplet.class
宽度=320HEIGHT =100＆GT;＆下; /小程序＆GT;＆LT;小程序code =SimpleApplet.class
codeBase类=/测试
宽度=320HEIGHT =100＆GT;＆下; /小程序＆GT;
连同其他尝试，包括删除，试图绝对和所有的部分路径名，以及使用的.java，它仍然不工作，我最终得到一个ClassNotFoundException。<一个href=\"http://stackoverflow.com/questions/11396646/load-class-myapplet-not-found-java-lang-classnotfoundexception-why-am-i-gett\">Other <一href=\"http://stackoverflow.com/questions/34413/why-am-i-getting-a-noclassdeffounderror-in-java\">answers指出，类路径和codeBase的（通常与归档）问题是发生这种情况，但我没有使用一个jar文件的主要原因和两个文件都在同一目录下。任何人都知道这是为什么发生？
- /家庭/ ME /工作区/ myProject的/ bin中
- applet.html
- /家庭/ ME /工作区/ myProject的/斌/测试
- SimpleApplet.class
如果该类 SimpleApplet 是包测试放在父目录的HTML（详见上文）并使用这个HTML。
＆LT; HTML和GT;
＆LT; HEAD＆GT;
＆LT; META HTTP-EQUIV =Content-Type的内容的text / html;字符集= UTF-8＆GT;
＆LT; /头＆GT;
＆LT;身体GT;
＆LT;小程序code =test.SimpleApplet
宽度=320HEIGHT =100＆GT;＆下; /小程序＆GT;
＆LT; /身体GT;
＆LT; / HTML＆GT;
侧面提示：
- 在当前张贴code，后期进口和封装声明为好，或者换句话说，这一切。由于这是我们需要做的事情的猜测;但与全code，我们就不会去。
- 在这个阶段不要尝试小程序。你应该理清在命令行上包工作，和小应用程序比使用GUI应用程序更加困难。
I realize there's a million of these posts but none of them have helped me so here goes: I'm trying to deploy a very, very simple applet that will not load properly. My HTML:
<html>
<head>
<meta http-equiv="Content-Type" content"text/html; charset=utf-8">
</head>
<body>
<applet code = "SimpleApplet.class"
width = "320" height = "100"></applet>
</body>
</html>
My Java:
package test;
import javax.swing.*;
public class SimpleApplet extends JApplet{
public void init(){
try{
SwingUtilities.invokeAndWait(new Runnable(){
public void run(){
JLabel lbl = new JLabel("Hello World");
add(lbl);
}
});
}
catch(Exception e){
System.out.println(e);
}
}
}
Both files are located in the same directory
/home/me/workspace/myProject/bin/test
If I run the applet on its own via Eclipse, it works fine. When I open the page I get the error
java.lang.NoClassDefFoundError: SimpleApplet (wrong name: test/SimpleApplet)
The error would suggest that I have incorrectly placed or named something. However, after trying
<applet code = "test/SimpleApplet.class"
width = "320" height = "100"></applet>
<applet code = "SimpleApplet.class"
codebase = "/test"
width = "320" height = "100"></applet>
along with other attempts, including removing the ", trying absolute and all partial path names, and using .java, it still does not work and I end up getting a ClassNotFoundException. Other answers point out that classpath and codebase (often relating to archive) issues are a primary reason for this occurring. However, I am not using a jar file and both files are in the same directory. Anyone know why this is occurring?
- /home/me/workspace/myProject/bin
- applet.html
- /home/me/workspace/myProject/bin/test
- SimpleApplet.class
If the class SimpleApplet is in package test put the HTML in the parent directory (as detailed above), and use this HTML.
<html>
<head>
<meta http-equiv="Content-Type" content"text/html; charset=utf-8">
</head>
<body>
<applet code = "test.SimpleApplet"
width = "320" height = "100"></applet>
</body>
</html>
Side tips:
- When posting code, post the imports and package statement as well, or in other words, all of it. As it is we need to make guesses about things; but with the full code, we would not have to.
- Don't attempt applets at this stage. You should sort out working with packages on the command line, and applets are more difficult than applications with a GUI.
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