src/main/java/lecture8_encapsulation/PersonRecord.java

...n/java/lecture8_encapsulation/TrafficLightVisualizer.java

src/main/java/lecture8_encapsulation/UsePerson.java

src/main/java/lecture8_encapsulation/useTrafficLight.java

src/main/java/lecture9/MyPanel.java

src/main/java/lecture9/Range.java

src/main/java/lecture9/UseGraphics.java

src/main/java/lecture9/UseRange.java