调用层次结构和查找引用 eclipse 之间有什么区别？
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What is the difference between call hierarchy and find references eclipse?
提问by kannanrbk
I got confused when using this two commands in eclipseCtrl+Shift+Gand Ctrl+Alt+Hboth are returning same results .
在使用此两个命令时，我糊涂了eclipseCtrl+ Shift+G和Ctrl+ Alt+H两者都返回相同的结果。
Scenario:
场景：
Want to find where the method "findUsage" has been called.
想找到方法“ findUsage”被调用的地方。
Sample Class
样本类
Call Hierarchy Output (Ctrl+Alt+H).
调用层次输出（Ctrl+ Alt+ H）。
Find References (Ctrl+Shift+G) output
查找引用（Ctrl+ Shift+ G）输出
Both are showing same results. Can anyone know what is the difference between these two commands?
两者都显示相同的结果。谁能知道这两个命令有什么区别？
回答by Bananeweizen
"Find references" shows you all direct callersof the selected method. "Call hierarchy" in contrast shows also the callers of those direct callers, and the callers of those, ... and so on.
“查找引用”向您显示所选方法的所有直接调用者。相比之下，“呼叫层次结构”还显示了那些直接呼叫者的呼叫者，以及那些的呼叫者……等等。
So the output is only identical, if direct callers of your selected method do not have any callers themselfes. Just try both commands on some larger code base and you will immmediately see the difference, like in this screenshot:
因此，如果您选择的方法的直接调用者本身没有任何调用者，则输出是相同的。只需在一些更大的代码库上尝试这两个命令，您就会立即看到不同之处，如下图所示：
If you wonder why there are two such features, if "Find references" is basically just a subset of the "Call hierarchy": Find references works really fast, so you can use it all the time without any waiting for results. The call hierarchy on the other hand takes more computation time and therefore may interrupt your coding workflow.
如果您想知道为什么有两个这样的功能，如果“查找引用”基本上只是“调用层次结构”的一个子集：查找引用的工作速度非常快，因此您可以一直使用它而无需等待结果。另一方面，调用层次结构需要更多的计算时间，因此可能会中断您的编码工作流程。
回答by Premraj
- Ctrl+ Shift+ G: Reference in workspace. It shows only referencesof selected class or method or variable in source code.
- Ctrl+ Alt+ H: Call Hierarchy. It shows all hierarchyup to root class.
- Ctrl+ Shift+G：工作区中的参考。它仅显示源代码中所选类或方法或变量的引用。
- Ctrl+ Alt+H：呼叫^ hierarchy。它显示了直到根类的所有层次结构。
