├── .DS_Store
└── Demo.java


/.DS_Store:
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https://raw.githubusercontent.com/DewmithMihisara/slider-assignment-swing/HEAD/.DS_Store


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/Demo.java:
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 1 | import javax.swing.*;
 2 | import java.awt.*;
 3 | import java.awt.event.*;
 4 | 
 5 | class Slider extends JFrame {
 6 | 	private JSlider sldr;
 7 | 	private JPanel sldrPnl;
 8 | 	static int value;
 9 | 	
10 | 	Slider(int length) {
11 | 		initComponents(length);
12 | 	}
13 | 	void initComponents(int length) {
14 | 		setSize(200, 250);
15 | 		setTitle("Slider " +length);
16 | 		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
17 | 		setLocationRelativeTo(null);
18 | 		
19 | 		sldrPnl = new JPanel();
20 | 		sldr = new JSlider(JSlider.VERTICAL, 10, 50, 25);
21 | 		sldr.setCursor(new Cursor(Cursor.HAND_CURSOR));
22 | 		sldr.setValue(value);
23 | 		
24 | 		sldr.addChangeListener((event) -> {
25 | 			if (!sldr.getValueIsAdjusting()) {
26 | 				value = sldr.getValue();
27 | 
28 | 				for (int i = 0; i < MainWindow.sliderAr.length; i++) {
29 | 					MainWindow.sliderAr[i].sldr.setValue(value);	
30 | 				}
31 | 			}
32 | 		});
33 | 
34 | 		sldrPnl.add(sldr);
35 | 		add(sldrPnl);
36 | 	}
37 | }
38 | 
39 | class MainWindow extends JFrame {
40 | 	private JButton b1;
41 | 	private JPanel btnPnl;
42 | 	static Slider[] sliderAr;
43 | 	
44 | 	MainWindow() {
45 | 		initComponents();
46 | 	}
47 | 	
48 | 	void extendsArray() {
49 | 		Slider[] temp = new Slider[sliderAr.length + 1];
50 | 		for (int i = 0; i < sliderAr.length; i++) {
51 | 			temp[i] = sliderAr[i];
52 | 		}
53 | 		sliderAr = temp;
54 | 	}
55 | 	
56 | 	void initComponents() {
57 | 		setSize(200, 100);
58 | 		setTitle("Main Window");
59 | 		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
60 | 		setLocationRelativeTo(null);
61 | 		
62 | 		sliderAr = new Slider[0];
63 | 		
64 | 		btnPnl=new JPanel();
65 | 		b1= new JButton("Create");
66 | 		b1.setCursor(new Cursor(Cursor.HAND_CURSOR));
67 | 		
68 | 		b1.addActionListener((event) -> {
69 | 			extendsArray();
70 | 			
71 | 			Slider c1 = new Slider(sliderAr.length);
72 | 			sliderAr[sliderAr.length - 1] = c1;
73 | 
74 | 			c1.setVisible(true);
75 | 		});
76 | 		
77 | 		btnPnl.add(b1);
78 | 		add(btnPnl,BorderLayout.CENTER);
79 | 	}
80 | }
81 | 
82 | class Demo {
83 | 	public static void main(String args[]) {
84 | 		new MainWindow().setVisible(true);
85 | 	}	
86 | }
87 | 


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