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Java > バイナリデータをファイルへ書き込む
write-bin.java
import java.io.*; class Test { public static void main(String args[]) { try { FileOutputStream fo = new FileOutputStream("hoge.bin"); fo.write(1); fo.write(2); fo.write(3); fo.close(); } catch (Exception e) { System.out.println("例外" + e + "発生!!"); } System.out.println(); } }
$ javac read_bin.java
$ java Test hoge.bin
$ od -tx1 hoge.bin
0000000 01 02 03
0000003
$
$ java Test hoge.bin
$ od -tx1 hoge.bin
0000000 01 02 03
0000003
$