質問編集履歴
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文の修正
test
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二分探索
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二分探索 ジェネリクス
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test
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package exer3.pet;
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public class PetComparator {
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public static int nameOrder(Pet a, Pet b) {
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return a.getName().compareTo(b.getName());
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}
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}
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package exer3.pet;
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public class Pet {
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public String name;
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public Pet(){
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setName("");
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}
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public Pet(String name){
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this();
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setName(name);
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}
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public void setName(String name){
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this.name = name;
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}
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public String getName(){
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return name;
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}
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@Override
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public String toString(){
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return "name:" + getName();
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}
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public String pat(){
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String s = ":「(-.-)」";
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return getName() + s;
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}
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@Override
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public boolean equals(Object obj) {
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return obj.equals(name);
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}
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}
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package exer3.pet;
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public class Cat extends Pet {
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private boolean vac ;
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public Cat() {
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super();
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setVac(true);
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}
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public Cat(String name) {
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this();
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setName(name);
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}
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public void setVac(boolean vac){
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this.vac = vac;
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}
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public boolean isVac(){
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return vac;
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}
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public String pat(){
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String s = ":「みゃみゃみゃみゃ」";
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return getName() + s;
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}
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}
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package exer3.pet;
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public class Dog extends Pet {
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private boolean vac;
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public Dog() {
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super();
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setVac(true);
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}
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public Dog(String name) {
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this();
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setName(name);
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}
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public void setVac(boolean bool){
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vac = bool;
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}
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public boolean isVac(){
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return vac;
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}
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@Override
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public String toString() {
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return super.toString() +", vac.:" + (isVac() ? "yes" : "no");
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}
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public String pat(){
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String s = ":「わんわん」";
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return getName() + s;
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}
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}
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メインクラス
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package exer3.search.tester;
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import exer3.pet.*;
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import exer3.search.BinarySearch;
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import java.util.ArrayList;
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import java.io.*;
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public class Main {
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public static void main(String[] args) {
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ArrayList<Pet> pets = new ArrayList<>();
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pets.add(new Dog("Giga"));
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pets.add(new Pet("Hamu"));
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pets.add(new Dog("Jiro"));
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pets.add(new Pet("Kotori"));
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pets.add(new Dog("Shiro"));
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pets.add(new Cat("Tama"));
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pets.add(new Dog("Taro"));
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pets.add(new Cat("Tora"));
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BinarySearch<Pet> bs =
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new BinarySearch<>(pets,
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(p1, p2) -> PetComparator.nameOrder(p1, p2));
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BufferedReader r =
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new BufferedReader(new InputStreamReader(System.in));
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String qs;
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while (null != (qs = r.readLine())) {
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Pet q = new Pet(qs);
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int ans = bs.indexOf(q);
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if (-1 == ans)
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System.out.printf("%s は,配列にありません.\n", q.getName());
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else {
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System.out.printf("%s は,配列の [%d] にありました.\n",
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q.getName(), ans);
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System.out.printf("a[%d] = %s\n", ans, pets.get(ans));
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}
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}
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r.close();
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```
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