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Eclipse's "Call Hierarchy" allows you to view a Java method or call tree of class member variables (both caller and callee), which is very convenient.

In IDEA, similar functions are divided into three commands.

In IntelliJ IDEA, you can select Navigate | Call Hierarchy command from the main menu to view a Java method call tree (in both caller and callee directions), but unlike Eclipse, you can view the call tree of class member variables.

As shown in the following figure, the two buttons in the upper left corner show the relationship between the called and the called.

In IntelliJ IDEA, you can select Analyze | Dataflow from/to Here from the main menu to view the passing relationship tree of expressions, variables, and method parameters.

Analyze | Data Flow to Here

Analyze | Data Flow from Here

IntelliJ IDEA's "Find Usage" allows you to see the direct use of a Java class, method, or variable.

Reference:

Http://blog.sina.com.cn/s/blog_72ef7bea0102vbai.html class diagram

Right-click Diagram on the package or class or use the shortcut key Ctrl+Alt+U.

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