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Java 数値 ⇔ 文字列変換

Posted at

#はじめに
学習用のメモになります。

#数値 ⇒ 文字列

String s = String.valueOf(i);

#文字列 ⇒ 数値

int i = Integer.parseInt(s);

Javaコーディング規約などでも推奨されています。

でもこんな方法でも変換はできます。

#数値 ⇒ 文字列

String s = "" + i; 
String s = new Integer(i).toString();
String s = Integer.toString(i);

#文字列 ⇒ 数値

int i = new Integer(s).intValue();
int i = Integer.valueOf(s).intValue();
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