//enum with colorspublicenumColor{RED,YELLOW,BLUE;}//class for the standard Lego Brick. You can connect or disconnect the Brick, it has colorpublicclassLegoBrick{Color color;boolean isConnected;publicvoidconnect(){System.out.println("This brick is connected");this.isConnected =true;}publicvoiddisconnect(){System.out.println("Disconnected");
isConnected =false;}publicLegoBrick(Color color,boolean isConnected){this.color = color;this.isConnected = isConnected;}publicColorgetColor(){return color;}publicbooleanisConnected(){return isConnected;}@OverridepublicStringtoString(){return"LegoBrick{"+"color="+ color +", isConnected="+ isConnected +'}';}}
importjava.util.ArrayDeque;publicclassLegoTower{ArrayDeque<LegoBrick> myTower;int quantityOfReds;int quantityOfYellows;publicvoidaddBrickToTower(LegoBrick newLegoBrick){if(newLegoBrick.getColor()==Color.YELLOW){this.myTower.offerLast(newLegoBrick);
quantityOfYellows++;}//we can use addFirst(e)/push(e) instead of offerFirst hereif(newLegoBrick.getColor()==Color.RED){
myTower.offerFirst(newLegoBrick);
quantityOfReds++;}}publicvoid removeBrickFromTower (LegoBrick legoBrick){if(legoBrick.getColor()==Color.YELLOW){this.myTower.removeLast();
quantityOfYellows--;}if(legoBrick.getColor()==Color.RED){
myTower.removeFirst();
quantityOfReds--;}
legoBrick.isConnected =false;}publicLegoTower(int quantityOfReds,int quantityOfYellows){
myTower =newArrayDeque<>();this.quantityOfReds = quantityOfReds;this.quantityOfYellows = quantityOfYellows;for(int i =0; i < quantityOfReds; i++){LegoBrick redLegoBrick =newLegoBrick(Color.RED,false);
myTower.addFirst(redLegoBrick);
redLegoBrick.isConnected =true;}for(int i =0; i < quantityOfYellows; i++){LegoBrick yellowLegoBrick =newLegoBrick(Color.YELLOW,false);
myTower.addLast(yellowLegoBrick);
yellowLegoBrick.isConnected =true;}}publicvoidsetMyTower(ArrayDeque<legobrick> myTower){this.myTower = myTower;}publicvoidsetQuantityOfReds(int quantityOfReds){this.quantityOfReds = quantityOfReds;}publicvoidsetQuantityOfYellows(int quantityOfYellows){this.quantityOfYellows = quantityOfYellows;}@OverridepublicStringtoString(){return"LegoTower{"+"myTower="+ myTower +", quantityOfReds="+ quantityOfReds +", quantityOfYellows="+ quantityOfYellows +'}';}publicvoiddrawTower(){for(LegoBrick i : myTower){System.out.println(i.color);}}}publicclassMain{publicstaticvoidmain(String[] args){LegoBrick legoBrick1 =newLegoBrick(Color.YELLOW,false);
legoBrick1.connect();System.out.println(legoBrick1.toString());
legoBrick1.disconnect();System.out.println(legoBrick1.toString());LegoBrick legoBrick2 =newLegoBrick(Color.YELLOW,false);LegoBrick legoBrick3 =newLegoBrick(Color.RED,false);LegoBrick legoBrick4 =newLegoBrick(Color.RED,false);LegoBrick legoBrick5 =newLegoBrick(Color.YELLOW,false);LegoTower legoTower =newLegoTower(2,5);System.out.println("my Initiated Lego Tower: ");
legoTower.drawTower();
legoTower.addBrickToTower(legoBrick1);
legoTower.addBrickToTower(legoBrick2);
legoTower.addBrickToTower(legoBrick3);
legoTower.addBrickToTower(legoBrick4);
legoTower.addBrickToTower(legoBrick5);System.out.println("My LegoTower after adding some elements: ");
legoTower.drawTower();
legoTower.removeBrickFromTower(legoBrick1);
legoTower.removeBrickFromTower(legoBrick3);System.out.println("We removed one red and one yellow brick:");
legoTower.drawTower();}}
このプログラムを実行した結果:
my Initiated LegoTower:
RED
RED
YELLOW
YELLOW
YELLOW
YELLOW
YELLOW
My LegoTower after adding some elements:
RED
RED
RED
RED
YELLOW
YELLOW
YELLOW
YELLOW
YELLOW
YELLOW
YELLOW
YELLOW
We removed one red and one yellow brick:
RED
RED
RED
YELLOW
YELLOW
YELLOW
YELLOW
YELLOW
YELLOW
YELLOW
Process finished with exit code 0
publicclassMyLinkedTest{publicstaticvoidmain(String[] args){String h1 ="my";String h2 ="favorite";String h3 ="book";// LinkedList implementation in JavaLinkedList<string> linkedList =newLinkedList();
linkedList.add(h1);
linkedList.add(h2);
linkedList.add(h3);System.out.println("my list after adding 3 elements:");System.out.println(linkedList);System.out.println("element #2 of my list:");System.out.println(linkedList.get(2));
linkedList.remove(1);System.out.println("my list after removing #1:");System.out.println(linkedList);
linkedList.add(1,"first");System.out.println("my list after adding an element in the middle");System.out.println(linkedList);}
このプログラムを実行した結果:
my list after adding 3 elements:
[my, favorite, book]
element #2 of my list:
book
my list after removing #1:
[my, book]
my list after adding an element in the middle
[my, first, book]