Find methods calls in Eclipse project

Go to the method in X.java, and select Open Call Hierarchy from the context menu.

Select mymethod() and press ctrl+alt+h.

To see some detailed Information about any method you can use this by selecting that particular Object or method and right click. you can see the "OpenCallHierarchy" (Ctrl+Alt+H). Like that many tools are there to make your work Easier like "Quick Outline" (Ctrl+O) to view the Datatypes and methods declared in a particular .java file.

To know more about this, refer this eclipse Reference

You can also search for specific methods. For e.g. If you want to search for isEmpty() method of the string class you have to got to - Search -> Java -> type java.lang.String.isEmpty() and in the 'Search For' option use Method.

You can then select the scope that you require.

Move the cursor to the method name. Right click and select References > Project or References > Workspace from the pop-up menu.