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Javaで「格納されている文字列の長さを変更する」の動作を確認してみた

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概要

Javaで「格納されている文字列の長さを変更する」の動作を確認してみました。以下のページを参考にしました。

実装

以下のファイルを作成しました。

JSample9_1.java
class JSample9_1{
  public static void main(String[] args){
    StringBuilder sb = new StringBuilder();

    sb.append("ABCDEF");
    System.out.println("[" + sb.toString() + "]");
    System.out.println(sb.length());

    sb.setLength(3);
    System.out.println("[" + sb.toString() + "]");
    System.out.println(sb.length());

    sb.setLength(6);
    System.out.println("[" + sb.toString() + "]");
    System.out.println(sb.length());
  }
}

以下のコマンドを実行しました。

$ javac JSample9_1.java 
$ java JSample9_1 
[ABCDEF]
6
[ABC]
3
[ABC]
6

まとめ

何かの役に立てばと。

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