Update GUI.md

Grade 10/Computer Science/ICS4U1/GUI.md

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+# Graphical User Interfaces (GUI)
+
+## What is a GUI
+- Graphical user interface
+- User friendly way to interact with a program
+- Allows the use of buttons and images ratherthan text
+
+## Creating
+
+- The class of a GUI in java must be deinfed ina a fdifferent way than regular
+
+## Codinga GUI
+Java foundation calssesw must be imported
+- javax.swing.*;
+- java.awt*.;
+- Class instance variable 
+-