Code after lecture 9

src/main/java/lecture8_encapsulation/PersonRecord.java

 package lecture8_encapsulation;
 
-public record PersonRecord(int age, String name) {
-
-}
+public record PersonRecord(int age, String name) {}
 
 

src/main/java/lecture8_encapsulation/TrafficLightVisualizer.java

@@ -87,7 +87,6 @@ public class TrafficLightVisualizer extends JPanel{
 			try {
 				Thread.sleep(1000);
 			} catch (InterruptedException e) {
-				// TODO Auto-generated catch block
 				e.printStackTrace();
 			}
 		}

src/main/java/lecture8_encapsulation/UsePerson.java

@@ -4,7 +4,13 @@ public class UsePerson {
 
 	public static void main(String[] args) {
 
-
+		PersonRecord pr = new PersonRecord(12, "Per");
+		System.out.println(pr);
+		Person p = new Person(17,"Lise");
+		System.out.println(p);
+		
+		System.out.println(pr.name());
+		System.out.println(p.getName());
 	}
 	
 }

src/main/java/lecture8_encapsulation/useTrafficLight.java

@@ -11,7 +11,7 @@ public class useTrafficLight {
 		//light.green=true; //not allowed when variable is private
 		
 		viewer.view(light);
-		//viewer.run();
+		viewer.run();
 		
 //		System.out.println(light.isValid(true, false, true));
 //		System.out.println(light.isValid(true, true, true));

src/main/java/lecture9/MyPanel.java

+package lecture9;
+
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel{
+
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		for(int i=0; i<100; i+=10) {
+			g.setColor(Color.GREEN);
+			g.fillOval(2*i,100 ,80,i);
+			g.setColor(Color.BLACK);
+			g.drawOval(2*i,100 ,80,i);
+		}
+		g.fillOval(200,100 ,70 ,40);
+		
+		Graphics2D g2 = (Graphics2D)g;
+		
+		
+	}
+	
+}

src/main/java/lecture9/Range.java

+package lecture9;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+
+public class Range implements Iterable<Integer>{
+
+	int max;
+	
+	Range(int max){
+		this.max = max;
+	}
+	
+	ArrayList<Integer> getList(){
+		ArrayList<Integer> indices = new ArrayList<Integer>();
+		for(int i=0; i<max; i++) {
+			indices.add(i);
+		}
+		return indices;
+	}
+
+	@Override
+	public Iterator<Integer> iterator() {
+		return getList().iterator();
+	}
+	
+	static Range range(int max) {
+		return new Range(max);
+	}
+}

src/main/java/lecture9/UseGraphics.java

+package lecture9;
+
+import javax.swing.JFrame;
+
+public class UseGraphics {
+
+	public static void main(String[] args) {
+		JFrame myFrame = new JFrame("My program");
+		myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		myFrame.setSize(300, 300);
+		
+		MyPanel myPanel = new MyPanel();
+		myFrame.add(myPanel);
+		
+		myFrame.setVisible(true);
+	}
+
+}

src/main/java/lecture9/UseRange.java

+package lecture9;
+
+import static lecture9.Range.range;
+
+public class UseRange {
+
+	public static void main(String[] args) {
+		//Range range = new Range(10);
+		
+//		for(int i:range.getList()) {
+//		for(int i:new Range(10)) {
+//		for(int i:Range.range(10)) {
+		for(int i:range(10)) {
+			System.out.println(i);
+		}
+
+	}
+
+}