import java.io.Serializable;


 class Computer implements Serializable {
	private String montrComp;
	private String sysUnit;
	private String mousComp;
	private String keybrdComp;
	boolean conditionOfComputer = false;


	public Computer(){

	}


	Computer(String monitor, String systemUnit, String mous, String keyboard ) {
		this.montrComp = monitor;
		this.sysUnit = systemUnit;
		this.mousComp = mous;
		this.keybrdComp = keyboard;
	}
	public String getMontrComp (){
		return montrComp;
	}
	public void setMontrComp(String newMontrComp) {
		montrComp = newMontrComp;
	}
	public String getSysUnit () {
		return sysUnit;
	}
	public void setSysUnit (String newSysUnit) {
		sysUnit = newSysUnit;
	}
	public String getMousComp () {
		return mousComp;
	}
	public void setMousComp (String newMousComp) {
		mousComp = newMousComp;
	}
	public String getKeybrdComp () {
		return keybrdComp;
	}
	public void setKeybrdComp (String newKeybrdComp) {
		keybrdComp = newKeybrdComp;
	}

	public String toString(){
		return  montrComp + " " + sysUnit + " " + mousComp + " " + keybrdComp;

	}
	protected void switchOn(){
		conditionOfComputer = true;
		System.out.println("I'm turned on");
	}
	protected void switchOff () {
		conditionOfComputer = false;
		System.out.println("I'm turned off");
	}
 }
	 class OperationSystem  {
		boolean installOperationSystem = false;
		boolean conditionOperationSystem  = false;

		protected void installOs () {
			installOperationSystem = true;
			System.out.println("Operating system has been installed");
		}
		protected void runOperationSystem () {
			conditionOperationSystem = true;
			System.out.println("The operating system was launched");
	}
	}



public class TestComputer {
public static void main (String [] args){
	Computer mycomp = new Computer("lgFlatron", "asus", "asusMouse", "keyboard");
	OperationSystem operSystem = new OperationSystem();
	Calculator calculator = new Calculator();
	FileManager filemanager = new FileManager();
	System.out.print("List of unnecessary things: ");
	System.out.println(mycomp.toString());
	mycomp.switchOn();
	operSystem.installOs();
	operSystem.runOperationSystem();
	calculator.installCalculator();
	filemanager.installFileManager();
	/*В классе Calculator добавил boolean переменную и метод installCalculator()
	void installCalculator() {
		conditionCalculator = true;
		System.out.println("Calculator has installed");
	}
	аналогично с классом FileManager
	*/

	}
}