Lakshmi Narasimhan Srinivasan

Thanks for the post Tim. It bums me out that tKinter does this, but it can't be helped. But I do have a doubt. Will adding widgets to the main window destroy the other tk window for studio channels.

Ps- Thanks for the diwali wishes.

So you are saying that the issue can't be resolved but can be worked around. But I can't seem to understand why ttk does this when you've explained it with respect to Java JVM. (Sry if my reply seems condescending, I am having a hard time understanding this.)

PS- it's diwali here in India, so I forgot to view this thread early...

Could you please elaborate. Couldn't understand...

Howdy y'all,
       I'm fairly good when it comes to tkinter and ttk and I've started to accept voluntary work as a UI/UX dev. I've started learning ttkbootstrap for a project that I'm working on. I can't get into the specifics of the project, but I'm working on the UI part of it. The issue is, that when I create ttkbootstrap Window, the program outputs two windows. Also the code doesn't resize and position the main window properly. I went for an object-oriented approach so that it'll be easier to isolate the logic and the UI parts of the codebase. Here's the code I've written so far:

import ttkbootstrap as ttk class CustomNotebook:    def __init__(self, name, style):        self.style = ttk.Style(style)                self.root = ttk.Window(title=name, themename=style)        centerX = (self.root.winfo_screenwidth() - 1000)/2        centerY = (self.root.winfo_screenheight() - 650)/2        self.root.geometry("%dx%d+%d+%d" % (1000, 650, centerX, centerY))        self.root.resizable(False, False)        self.root.mainloop()         if __name__ == "__main__":    SLN = CustomNotebook("Hello", "darkly")

Id appreciate if someone can help me resolve this issue. Thanks in advance....

Update: Thanks Carey for your detailed explanation. The jar command works now. Now I can continue preparing for my ocp exam prep.

Update: I just graduated out of grade 12 with a majors in biology, so I'm kind of new to creating environment variables and couldn't understand what Carey Brown orTim Holloway said. Could you guys be more specific.

Dear Java Gurus,

I've started preparing for my ocp exams for java se 17 for the last couple of weeks. I've completed most of the practical code examples given in the ocp study guide by Selikoff and Boyarsky but faced issues in the modules chapter. I have downloaded the jdk for java 17 from the oracle website. The java and javac commands work perfectly fine but I face issues when it comes to creating jars with the jar command from the cmd prompt.

I tried running the jar command by itself and here's the error message I got:



D:\>jar 'jar' is not recognized as an internal or external command, operable program or batch file.


when I try java -jar I get this message:

D:\>java -jar Error: -jar requires jar file specification Usage: java [options] <mainclass> [args...]           (to execute a class) ...


I've tried reinstalling the entire jdk and tried updating my path variables but can't seem to resolve this issue. I've even tried the methods under this post on stack overflow   -->  https://stackoverflow.com/questions/29180639/java-jar-is-not-recognized-as-an-internal-or-external-command  but couldn't seem to fix it. Please help me resolve this issue.

I'm using a lenovo laptop with an AMD Ryzen 3 5300U with Radeon graphics (2.6GHz, x64 arch) processor with a windows 11 installation with all the latest updates.