June 2018 Update

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

@@ -1,35 +1,38 @@
 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;
-public class Clicks extends JFrame implements ActionListener{
+import javax.swing.SwingUtilities;
+public class Clicks extends JFrame{
 	private long clicks = 0;
-	private JLabel label;
-	private JButton clicker;
-	private String text;
 
 	public Clicks(){
-		text = "There have been no clicks yet";
-		label = new JLabel(text);
-		clicker = new JButton("click me");
-		clicker.addActionListener(this);//listen to the button
+		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
-		setSize(300,200);//stretch out the window
+		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){
-		new Clicks();//call the constructor where all the magic happens
-	}
-	public void actionPerformed(ActionEvent arg0) {
-		if(arg0.getSource() == clicker){//if they clicked the button
-			text = "There have been " + (++clicks) + " clicks";
-			label.setText(text);//change the text
-		}
-		
+		SwingUtilities.invokeLater( //Swing UI updates should not happen on the main thread
+			() -> new Clicks() //call the constructor where all the magic happens
+		);
 	}
 }