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Javaで「ファイルに追加で書き込む」の動作を確認してみた

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概要

Javaで「ファイルに追加で書き込む」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。

StreamTest5.java
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

class StreamTest5{
  public static void main(String args[]){
    try{
      File file = new File("test.txt");

      if (checkBeforeWritefile(file)){
        FileWriter filewriter = new FileWriter(file, true);

        filewriter.write("はい。元気です\r\n");
        filewriter.write("ではまた\r\n");

        filewriter.close();
      }else{
        System.out.println("ファイルに書き込めません");
      }
    }catch(IOException e){
      System.out.println(e);
    }
  }

  private static boolean checkBeforeWritefile(File file){
    if (file.exists()){
      if (file.isFile() && file.canWrite()){
        return true;
      }
    }

    return false;
  }
}

以下のコマンドを実行しました。

$ javac StreamTest5.java 
$ java StreamTest5 
$ java StreamTest5 

まとめ

何かの役に立てばと。

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