如何写入Netbeans Debugger Console（在Java中）？ [英] How do I write to the Netbeans Debugger Console (in Java)?

问题描述

Netbeans在Output部分中有一个标签窗口，名为Debugger Console。是否可以使用Java编写一个消息到这个窗口？如果是，那么如何？

解决方案

您在调试器控制台中看到的消息是

$ ol

调试器本身提供的信息（例如添加断点）

与断点相关联的自定义消息

当您将断点添加到一行代码时，断点的默认行为是挂起执行代码行的线程，并打印文本线程{threadName}在类{className}中的{lineNumber}行的断点。。

配置断点以打印自定义文本。当文本到达断点时，该文本将在调试器控制台中输出。为此，右键单击断点，打开propoerties窗口，并在字段打印文本中输入您的文本。

一个有用的技巧是配置断点，使其不会阻塞（ suspend：no thread ），并输入文本。效果与在代码中添加 println 行相同，但好处是您不必重新编译代码，并且更容易激活/停用这些调试器日志（它显然不会停留在生产代码上）。

请注意，在断点的文本中，可以使用特殊值 {lineNumber} ， {methodName} ， {className} 或 {threadName} ，您还可以使用语法 {= xxx} 来评估一些代码。只需用变量名称或方法调用替换xxx，或任何。

Netbeans has a tabbed window in the Output section called "Debugger Console". Is it possible to write a message to this window using Java? If so, how?

解决方案

The messages you see in the debugger console are either

1. informations given by the debugger itself (breakpoint added, for example)
2. custom messages associated with a breakpoint

When you add a breakpoint to a line of code, the default behavior of the breakpoint is to suspend the thread that executed the line of code, and to print the text "Breakpoint hit at line {lineNumber} in class {className} by thread {threadName}.".

You can configure a breakpoint to print a custom text. This text will be output in the debugger console when it reaches the breakpoint. To do so, right click on a breakpoint, open the propoerties window, and enter your text in the field Print text.

A useful trick is to configure a breakpoint so that it does not block (suspend : no thread), and to enter a text. The effect is the same than adding println lines in your code, but the benefit is that you don't have to recompile the code, and it's easier to activate/deactivate these debugger logs (and it obviously does not stay on production code).

Note that, in the text of the breakpoint, you can use one of the special values {lineNumber}, {methodName}, {className} or {threadName}, and you can also evaluate some code with the syntax {=xxx}. Just replace xxx with a variable name, or a method call, or whatever.

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