feat (class/relationship): relationship exercise

notebooks/pt/c02oo-java/s03relacionamento/s04tabuleiro/primeiro-tabuleiro.ipynb

@@ -0,0 +1,149 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "adjusted-astrology",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "com.twosigma.beaker.javash.bkr2da291e3.Peca"
+      ]
+     },
+     "execution_count": 1,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "public class Peca {\n",
+    "    Peca esquerda = null,\n",
+    "         direita = null;\n",
+    "\n",
+    "    public void pecaEsquerda(Peca pc) {\n",
+    "        esquerda = pc;\n",
+    "    }\n",
+    "    \n",
+    "    public void pecaDireita(Peca pc) {\n",
+    "        direita = pc;\n",
+    "    }\n",
+    "    \n",
+    "    String mostra() {\n",
+    "      return \"\" + (((esquerda != null) ? 1 : 0) + ((direita != null) ? 1 : 0));\n",
+    "    }\n",
+    "}"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "stunning-bailey",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "com.twosigma.beaker.javash.bkr2da291e3.Tabuleiro"
+      ]
+     },
+     "execution_count": 2,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "public class Tabuleiro {\n",
+    "    Peca tab[];\n",
+    "\n",
+    "    public Tabuleiro() {\n",
+    "        tab = new Peca[10];\n",
+    "    }\n",
+    "    \n",
+    "    public void inserePeca(Peca pc, int posicao) {\n",
+    "        if (posicao < tab.length) {\n",
+    "            tab[posicao] = pc;\n",
+    "            if (posicao > 0) {\n",
+    "                pc.pecaEsquerda(tab[posicao-1]);\n",
+    "                if (tab[posicao-1] != null)\n",
+    "                    tab[posicao-1].pecaDireita(pc);\n",
+    "            } else\n",
+    "                pc.pecaEsquerda(null);\n",
+    "            if (posicao < tab.length - 1) {\n",
+    "                pc.pecaDireita(tab[posicao+1]);\n",
+    "                if (tab[posicao+1] != null)\n",
+    "                    tab[posicao+1].pecaEsquerda(pc);\n",
+    "            } else\n",
+    "                pc.pecaDireita(null);\n",
+    "        }\n",
+    "    }\n",
+    "    \n",
+    "    public String mostra() {\n",
+    "        String result = \"\";\n",
+    "        for (int t = 0; t < tab.length; t++)\n",
+    "            result += (tab[t] == null) ? \".\" : tab[t].mostra();\n",
+    "        return result;\n",
+    "    }\n",
+    "}"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "billion-catalog",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      ".0.11..121\n"
+     ]
+    },
+    {
+     "data": {
+      "text/plain": [
+       "null"
+      ]
+     },
+     "execution_count": 3,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "Tabuleiro tabl = new Tabuleiro();\n",
+    "int posicoes[] = {1, 3, 4, 7,8, 9};\n",
+    "for (int p = 0; p < posicoes.length; p++)\n",
+    "    tabl.inserePeca(new Peca(), posicoes[p]);\n",
+    "System.out.println(tabl.mostra());"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "hybrid-vertex",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Java",
+   "language": "java",
+   "name": "java"
+  },
+  "language_info": {
+   "codemirror_mode": "text/x-java",
+   "file_extension": ".java",
+   "mimetype": "",
+   "name": "Java",
+   "nbconverter_exporter": "",
+   "version": "1.8.0_121"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}