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Variables. We can see the values of variables during the execution under the Variables view. In order to see the static variables, we can select the drop-down option Java -> Show Static Variables. Using the variables view, it's possible to change any value to the desired value during the execution.
Static methods cannot access or change the values of instance variables or the this reference (since there is no calling object for them), and static methods cannot call non-static methods. However, non-static methods have access to all variables (instance or static) and methods (static or non-static) in the class.
In the Debug Variables view their is a arrow button in the right of the view. the tooltip of this button is Menu.
When you click this button a drop down menu is shown where you can select
Java -> Show static variables
Note: You do not have to restart Eclipse.
Simply put your mouse cursor over the static variable in the code and you will see the assigned value.
You can view static variable and also edit during runtime. Click on small arrow pointing downword. see below image
Window -> Show View -> Other -> Debug -> Expressions -> Right Click on Window -> Add Watch Expression... -> Enter the name of the variable you want to see
You might also try writing the expression e.g. self::$value in the watch window
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