Tried several ways how can not solve the

CodePudding user response:

You define the graphic no assignment so prompt warning
And named best don't use Chinese class function, form a good habit to use English

CodePudding user response:

What is your problem?

CodePudding user response:

Graphics graphic=new Graphics ();

CodePudding user response:

This is just a warning and is not an error

CodePudding user response:

Graphics graphic=new Graphics ();

CodePudding user response:

Don't put it commented out

CodePudding user response:

This line of code, adding a "//"
coming to an end,Or reference 3 l method