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java.lang.String

java.lang.Stringは、不変の文字列を示すクラスです。

ヒント

Stringオブジェクトは、過剰に使用したり、文字列の操作や連結に使用すると、過度の処理時間を発生させることがあります。

Stringオブジェクトは不変であるため、連結を実行する場合、既存のStringオブジェクトに追加すると、複数のStringオブジェクトが作成されることがあります。

代わりにjava.lang.StringBufferオブジェクトを使用することによって、パフォーマンスが向上します。長いストリングで文字の操作を行う必要がある場合、文字配列を使用したり、java.lang.String.toCharArray()メソッドを使用してStringオブジェクトを文字配列に変換したりしてください。

「java.lang.StringBuffer」も参照してください。