调试构造函数时找不到源 [英] Source not found when debugging constructor

问题描述

我是一位经验丰富的.NET和Visual Studio开发人员，他试图切换到Java和Eclipse。我是Eclipse的新手。

我很难调试我的Java程序。当我尝试进入构造函数时，逐步进入调试功能总是导致源未找到错误消息，带有编辑源查找路径按钮。我刚刚安装了Eclipse企业版，并没有混淆任何设置。

即使调试内部类也会导致此错误。考虑这个代码：

  public class HelloWorld {
 public static void main（String [] args）{
类JustForTesting {
 public String s; 
 public JustForTesting（）{
 s =只是一个测试; 
} 
} 
 JustForTesting n = new JustForTesting（）; 
 System.out.println（Hello World！+ n.s）; 
} 
} 
  

如果我在第9行放置一个断点，并尝试进入构造函数（第5行），它说源未找到。窗口的标题是 Launcher $ AppClassLoader（ClassLoader）.loadClass（String）line：24 非常令人难以置信的代码显然位于同一个文件中！

解决方案

这不是一个Eclipse的东西，更多的是Java的东西。当您第一次构建任何类时，Java需要加载类。如果您再次遇到这种情况，只需执行一步退回（这将完成加载该类），然后再次执行（这将进入您的构造函数）。

I am an experienced .NET and Visual Studio developer who's trying to switch to Java and Eclipse. I am a newbie to Eclipse.

I am having a hard time debugging my Java programs. The "step into" debugging function always results in a "Source not found" error message with an "Edit Source Lookup Path" button whenever I try to step into a constructor. I've just installed Eclipse Enterprise Edition and not messed around with any settings.

Even debugging inner classes results in this error. Consider this code:

public class HelloWorld {   
  public static void main(String[] args) {
        class JustForTesting {
        public String s;
        public JustForTesting() {
        s = "Just a test";
        }
    }   
    JustForTesting n = new JustForTesting();
     System.out.println("Hello World! " + n.s);
  }
}

If I put a breakpoint at line 9 and try to step into the constructor (line 5) it says "Source not found". The title of the window is Launcher$AppClassLoader(ClassLoader).loadClass(String) line: 24 Quite unbelievable as the code obviously resides in the same file!

解决方案

It's not so much an Eclipse thing and more of a Java thing. When you construct any class for the first time Java needs to load the class. If you get into that situation again just do a step-return (this will finish loading the class) and then do step-into again (this will go into your constructor).

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