Initial data commit

Task/Simple-windowed-application/Java/simple-windowed-application.java

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+import java.awt.BorderLayout;
+import java.awt.Dimension;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.SwingUtilities;
+public class Clicks extends JFrame{
+	private long clicks = 0;
+
+	public Clicks(){
+		super("Clicks");//set window title
+		JLabel label = new JLabel("There have been no clicks yet");
+		JButton clicker = new JButton("click me");
+		clicker.addActionListener(//listen to the button
+			new ActionListener(){
+				@Override
+				public void actionPerformed(ActionEvent e) {
+					label.setText("There have been " + (++clicks) + " clicks");//change the text
+				}
+			}
+		);
+		setLayout(new BorderLayout());//handles placement of components
+		add(label,BorderLayout.CENTER);//add the label to the biggest section
+		add(clicker,BorderLayout.SOUTH);//put the button underneath it
+		label.setPreferredSize(new Dimension(300,100));//nice big label
+		label.setHorizontalAlignment(JLabel.CENTER);//text not up against the side
+		pack();//fix layout
+		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//stop the program on "X"
+		setVisible(true);//show it
+	}
+	public static void main(String[] args){
+		SwingUtilities.invokeLater( //Swing UI updates should not happen on the main thread
+			() -> new Clicks() //call the constructor where all the magic happens
+		);
+	}
+}