回答編集履歴
2
ソース修正
test
CHANGED
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@@ -34,15 +34,11 @@
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private String title; // タイトル
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private String title; // タイトル
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private Date publishDate; // 発行日
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private int price; // 価格
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private int price; // 価格
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private static DateFormat _df = new SimpleDateFormat("yyyy/MM/dd");
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@@ -60,7 +56,9 @@
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public String toString() {
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DateFormat df = new SimpleDateFormat("yyyy/MM/dd");
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String str = String.format("「%s」(%s) ￥%d", title,
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String str = String.format("「%s」(%s) ￥%d", title, df.format(publishDate), price);
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return(str);
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@@ -76,23 +74,25 @@
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public static void main(String[] args) throws Exception {
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DateFormat df = new SimpleDateFormat("yyyy/MM/dd");
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// Book の配列を作成
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Book[] myBooks = new Book[]{
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new Book("EFFECTIVE JAVA 第2版",
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new Book("EFFECTIVE JAVA 第2版", df.parse("2014/3/11"), 3888),
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new Book("Pythonではじめる機械学習",
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new Book("Pythonではじめる機械学習", df.parse("2017/5/25"), 3672),
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new Book("JavaScript Ninjaの極意",
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new Book("JavaScript Ninjaの極意", df.parse("2013/5/25"), 3672),
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new Book("Rubyによるクローラー開発技法",
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new Book("Rubyによるクローラー開発技法", df.parse("2014/8/23"), 3218)
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};
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1
テキスト修正
test
CHANGED
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@@ -30,7 +30,7 @@
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*/
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public class Book implements Comparable {
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public class Book implements Comparable<Book> {
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@@ -68,11 +68,7 @@
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public int compareTo(
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public int compareTo(Book other) {
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Book other = (Book) obj; // ClassCastException対応は割愛
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return(this.publishDate.compareTo(other.publishDate));
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@@ -90,13 +86,13 @@
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Book[] myBooks = new Book[]{
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new Book("EFFECTIVE JAVA 第2版", _df.parse("2014/3/11"), 3888),
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new Book("EFFECTIVE JAVA 第2版", _df.parse("2014/3/11"), 3888),
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new Book("Pythonではじめる機械学習", _df.parse("2017/5/25"), 3672),
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new Book("Pythonではじめる機械学習", _df.parse("2017/5/25"), 3672),
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new Book("JavaScript Ninjaの極意", _df.parse("2013/5/25"), 3672),
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new Book("JavaScript Ninjaの極意", _df.parse("2013/5/25"), 3672),
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new Book("Rubyによるクローラー開発技法", _df.parse("2014/8/23"), 3218)
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new Book("Rubyによるクローラー開発技法", _df.parse("2014/8/23"), 3218)
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};
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@@ -148,11 +144,7 @@
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```java
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public int compareTo(
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public int compareTo(Book other) {
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Book other = (Book) obj; // ClassCastException対応は割愛
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return(this.publishDate.compareTo(other.publishDate));
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@@ -186,9 +178,7 @@
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```java
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public int compareTo(
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public int compareTo(Book other) {
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Book other = (Book) obj; // ClassCastException対応は割愛
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