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【Java】初期化、追加、取得

配列

データ型 [] 配列名 = データ型 [要素数];

Array.java
String[] aaa = new String[100];
aaa[0] = "文章";
String bbb = aaa[0];

リスト

List<データ型> オブジェクト名 = new ArrayList<>();

List.java
List<String> aaa = new ArrayList<>();
aaa.add("AA");
aaa.get(0);

マップ

Map<キーの型, 値の型> オブジェクト名 = new HashMap<>();

Map.java
Map<Integer, String> aaa = new HashMap<>();
aaa.put(1, "文章");
aaa.get(1);

後記

解説はいらない、
初期化の方法をど忘れしたので、テキトーでいいからとりあえず動かしたいんだ……。
というときのために、迷わないように簡単なものだけ挙げています。

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