qa8310825 light system for you

// test class
public class QA8310825ForYou {
  public static void main(String[] args) {
    LightSystemForYou system = new LightSystemForYou();
    system.showState();
    system.turnSwich1(); system.showState();
    system.turnSwich1(); system.showState();
    system.turnSwich2(); system.showState();
    system.turnSwich3(); system.showState();
    system.turnSwich2(); system.showState();
    system.turnSwich1(); system.showState();
  }
}
class LightSystemForYou {
  private static final int floor = 3;
  private int[] swiches = new int[floor];
  private int lamp;

  public LightSystemForYou() {
    for (int i = 0; i < floor; i++) {
      this.swiches[i] = 0; // Left: 0, Right: 1
    }
    this.lamp = 0; // Off: 0, On: 1
  }

  public void showState() {
    System.out.print("Lamp: ");
    if (this.lamp == 0) {
      System.out.print("Off");
    }
    else {
      System.out.print("On");
    }
    System.out.print(", swiches: [");
    for (int i = 0; i < floor; i++) {
      if (swiches[i] == 0) {
        System.out.print("Left");
      }
      else {
        System.out.print("Right");
      }
      if (i < floor - 1) {
        System.out.print(", ");
      }
    }
    System.out.println("]");
  }

  private void turn(int i) {
    if (this.swiches[i] == 0) {
      this.swiches[i] = 1;
    }
    else {
      this.swiches[i] = 0;
    }
    if (this.lamp == 0) {
      this.lamp = 1; return;
    }
    this.lamp = 0;
  }

  public void turnSwich1() {
    this.turn(0);
  }

  public void turnSwich2() {
    this.turn(1);
  }

  public void turnSwich3() {
    this.turn(2);
  }
}