/* Quasi-file being read: --------------------------------------------------- I 110010 STACK STRETCHER 10 2 I 101001 CIRCULAR QUEUE 15 10 I 666666 PSEUDOCODE GENERATOR 38 3 I 123456 LIST LINKER 11 5 I 567890 DOUBLE LISTER 12 4 D 101001 R 123456 4 R 123456 2 A 110010 10 I 100001 TREE BARKER 8 38 P D 666666 R 123456 8 P D 123456 P Q --------------------------------------------------- */ ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// public class Node{ private T item; private Node next; private Node prev; public Node(){} public Node(T item){ this.item = item; prev = null; next = null; } public Node(T item, Node prev){ this.item = item; this.prev = prev; next = null; } public Node(T item, Node prev, Node next){ this.item = item; this.prev = prev; this.next = next; } public void setItem(T item){ this.item = item; } public void setNext(Node next){ this.next = next; } public void setPrev(Node prev){ this.prev = prev; } public T getItem(){ return item; } public Node getNext(){ return next; } public Node getPrev(){ return prev; } } ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// public class InventoryList{ private Node tail; private Node ptr; private Node head = new Node(); private int size = 0; public InventoryList(){ head.setPrev(head); tail = head; } public InventoryList(int elements){ head.setPrev(head); tail = head; for(int i = 0; i nIte = new Node(item, tail); tail.setNext(nIte); tail = nIte; size++; } public void remove(){ if(size == 0) return; tail = tail.getPrev(); tail.setNext(null); size--; } public int indexOf(T item){ for(int i = 0; i < size; i++) if(get(i) == item) return i; return -1; } public void remove(int ion){ if(ion == size-1){ remove(); return; } else if(ion == 0){ head.setNext(head.getNext().getNext()); head.getNext().setPrev(head); size--; } else{ ptr = node(ion); ptr.getPrev().setNext(ptr.getNext()); ptr.getNext().setPrev(ptr.getPrev()); ptr = null; size--; } } public void insert(int ion, T item){ if(ion == size){ add(item); return; } ptr = node(ion); Node nIte = new Node(item, ptr.getPrev(), ptr); ptr.getPrev().setNext(nIte); ptr.setPrev(nIte); size++; } public void changeItem(int ion, T item){ node(ion).setItem(item); } public int size(){ return size; } public T get(int i){ if(i >= size || i < 0){ System.out.println("Error: index out of bounds."); System.exit(0); return null; } if(i == 0) return head.getNext().getItem(); if(i == size-1) return tail.getItem(); if(i > size/2){ ptr = tail; for(int j = size-1; j!=i; j--) ptr = ptr.getPrev(); return ptr.getItem(); } ptr = head; for(int j = 0; j<=i; j++) ptr = ptr.getNext(); return ptr.getItem(); } private Node node(int ion){ if(ion >= size || ion < 0){ System.out.println("Error: index out of bounds."); System.exit(0); return null; } if(ion == 0) return head.getNext(); if(ion == size-1) return tail; if(ion > size/2){ ptr = tail; for(int j = size-1; j!=ion; j--) ptr = ptr.getPrev(); return ptr; } ptr = head; for(int j = 0; j<=ion; j++) ptr = ptr.getNext(); return ptr; } @Override public String toString(){ if(size == 0) return "[]"; String str = "["; ptr = head.getNext(); for(int i = 0; i inv; InventoryList> list = new InventoryList>(); String str = ""; int a,b; System.out.println(); for(int z = 0;z<4;z++){ switch(z){ case 0: input = new Scanner(r); break; case 1: input = new Scanner(s); break; case 2: input = new Scanner(t); break; case 3: input = new Scanner(u); break; } while(input.hasNext()){ str = input.next(); switch(str.charAt(0)){ case 'I': inv = new InventoryList(5); for(int i = 0, j = 0; i < 4; i++){ str = input.next(); try{ Integer.parseInt(str); inv.changeItem(i, str); } catch(Exception e){ if(j == 1){ i--; inv.changeItem(i,inv.get(i) + " " + str); } else inv.changeItem(i, str); j++; } } if(list.size() == 0) list.add(inv); else for(int i = 0; i <= list.size(); i++){ if(i == list.size()){ list.add(inv); break; } if(Integer.parseInt(inv.get(0)) < Integer.parseInt(list.get(i).get(0))){ list.insert(i, inv); break; } } a = Integer.parseInt(inv.get(2)); if(a <= Integer.parseInt(inv.get(3))) inv.changeItem(4, "*REORDER*"); else inv.changeItem(4, null); System.out.printf("Component %s added.\n\n",inv.get(0)); if(a <= Integer.parseInt(inv.get(3))){ inv.changeItem(4, "*REORDER*"); System.out.printf("Component %s needs to reorder units.\n\n",inv.get(0)); } break; case 'D': str = input.next(); for(int i = 0; i < list.size();i++) if(str.equals(list.get(i).get(0))){ list.remove(i); System.out.printf("Component %s removed.\n\n", str); break; } break; case 'P': print(list); break; case 'R': str = input.next(); String comp = str; for(int i = 0; i < list.size();i++) if(str.equals(list.get(i).get(0))){ str = input.next(); b = Integer.parseInt(str); a = Integer.parseInt(list.get(i).get(2)); a -= b; if(a < 0){ System.out.printf("Component %s has been reduced below existing units.\n",comp); System.out.printf("Component %s has been reduced to 0 units.\n", comp); System.out.printf("Component %s needs to reorder units.\n\n",comp); list.get(i).changeItem(2, "0"); break; } else if(a <= Integer.parseInt(list.get(i).get(3))){ list.get(i).changeItem(4, "*REORDER*"); System.out.printf("Component %s needs to reorder units.\n\n",comp); } list.get(i).changeItem(2, String.valueOf(a)); break; } break; case 'A': str = input.next(); for(int i = 0; i < list.size();i++) if(str.equals(list.get(i).get(0))){ str = input.next(); b = Integer.parseInt(str); a = Integer.parseInt(list.get(i).get(2)); a += b; if(a > Integer.parseInt(list.get(i).get(3))) list.get(i).changeItem(4, null); System.out.printf("Component %s added %d units.\n\n",list.get(i).get(0),b); list.get(i).changeItem(2, String.valueOf(a)); break; } break; case 'Q': print(list); System.out.println(">>End of commands."); System.exit(0); break; } } } } private static void print(InventoryList> list){ //System.out.printf("%-27s%-21s%s\n","COMP.","CURRENT #","REORDER"); System.out.println("COMP. DESC. # IN STOCK. REORDER LEVEL"); //System.out.printf("%-10s%-17s%-21s%s\n","NUMBER","DESCRIPTION","IN STOCK","LEVEL"); System.out.println("-----------------------------------------------"); String line; for(int i = 0; i < list.size(); i++){ line = ""; line += String.format("%-8s", list.get(i).get(0)); if(list.get(i).get(1).length() > 12) line += String.format("%-12.12s%-5s", list.get(i).get(1),"."); else line += String.format("%-17s",list.get(i).get(1)); line += String.format("%-9s", list.get(i).get(2)); line += String.format("%-4s", list.get(i).get(3)) ; if(list.get(i).get(4) != null) line += String.format("%s", list.get(i).get(4)); System.out.println(line); System.out.println("_______________________________________________"); } System.out.println(); System.out.println(); } }

p3