15章：入出力

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トップ-> Java入門：15章入出力-> FileInputStream

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FileInputStreamのサンプル

　　FileInputStreamクラスの基本的な例を示します。(ファイルのダンプ表示）

import java.io.*; class Test{ public static void main(String args[]){ try{ // ストリーム作成 InputStream st = new BufferedInputStream(new FileInputStream(args[0])); int data; int i = 1; // １バイト読み込み while( (data = st.read()) >= 0 ){ System.out.print( data < 16 ? "0"+Integer.toHexString(data) : Integer.toHexString(data)); System.out.print( ' ' ); // 16の倍数なら改行 if( (i && 15) == 0 ) System.out.println(); i++; } // ストリームをクローズ st.close(); }catch(FileNotFoundException e){ System.err.println("ファイルが開けません：" + args[0]); }catch(IOException e){ System.err.println("入出力エラーです"); } } }
C:\Java\>java Test Test.class ca fe ba be 00 03 00 2d 00 56 08 00 35 08 00 54 08 00 55 07 00 3e 07 00 43 07 00 44 07 00 45 07 00 46 07 00 47 07 00 48 07 00 49 07 00 4a 07 00 4b 07 00 4c 0a 00 0c 00 1e 0a 00 05 00 1f 0a 00 06 00 20 0a 00 0d 00 20 0a 00 0d 00 21 0a 00 09 00 22 09 00 0e 00 23 09 00 0e 00 24 0a 00 0a 00 25 0a 00 0a 00 26 0a 00 0a 00 27 0a 00 0a 00 28 0a 00 09 00 29 0a 00 0b 00 2a 0a 00 0d 00 2b 0c 00 36 00 2e 0c 00 36 00 31 0c 00 36 00 33 0c 00 40 00 32 0c 00 41 00 2e 0c 00 42 00 3b 0c 00 4e 00 3b 0c 00 4f 00 2f 0c 00 4f 00 33 0c 00 50 00 2e 0c 00 50 00 33 0c 00 51 00 2c 0c 00 52 00 30 0c 00 53 00 2d 01 00 03 28 29 49 01 00 14 28 29 4c 6a 61 76 61 2f 6c 61 6e 67 2f 53 74 72 69 6e 67 3b 01 00 03 28 29 56 01 00 04 28 43 29 56 01 00 15 28 49 29 4c 6a 61 76 61 2f 6c 61 6e 67 2f 53 74 72 69 6e 67 3b 01 00 18 28 4c 6a 61 76 61 2f 69 6f 2f 49 6e 70 75 74 53 74 72 65 61 6d 3b 29 56 01 00 2c 28 4c 6a 61 76 61 2f 6c 61 6e 67 2f 53 74 72 69 6e 67 3b 29 4c 6a 61 76 61 2f 6c 61 6e 67 2f 53 74 72 69 6e 67 42 75 66 66 65 72 3b 01 00 15 28 4c 6a 61 76 61 2f 6c 61 6e 67 2f 53 74 72 69 6e 67 3b 29 56 01 00 16 28 5b 4c 6a 61 76 61 2f 6c 61 6e 67 2f 53 74 72 69 6e 67 3b 29 56 01 00 01 30 01 00 06 3c 69 6e 69 74 3e 01 00 04 43 6f 64 65 01 00 0d 43 6f 6e 73 74 61 6e 74 56 61 6c 75 65 01 00 0a 45 78 63 65 70 74 69 6f 6e 73 01 00 0f 4c 69 6e 65 4e 75 6d 62 65 72 54 61 62 6c 65 01 00 15 4c 6a 61 76 61 2f 69 6f 2f 50 72 69 6e 74 53 74 72 65 61 6d 3b 01 00 0e 4c 6f 63 61 6c 56 61 72 69 61 62 6c 65 73 01 00 0a 53 6f 75 72 63 65 46 69 6c 65 01 00 04 54 65 73 74 01 00 09 54 65 73 74 2e 6a 61 76 61 01 00 06 61 70 70 65 6e 64 01 00 05 63 6c 6f 73 65 01 00 03 65 72 72 01 00 1b 6a 61 76 61 2f 69 6f 2f 42 75 66 66 65 72 65 64 49 6e 70 75 74 53 74 72 65 61 6d 01 00 17 6a 61 76 61 2f 69 6f 2f 46 69 6c 65 49 6e 70 75 74 53 74 72 65 61 6d 01 00 1d 6a 61 76 61 2f 69 6f 2f 46 69 6c 65 4e 6f 74 46 6f 75 6e 64 45 78 63 65 70 74 69 6f 6e 01 00 13 6a 61 76 61 2f 69 6f 2f 49 4f 45 78 63 65 70 74 69 6f 6e 01 00 13 6a 61 76 61 2f 69 6f 2f 49 6e 70 75 74 53 74 72 65 61 6d 01 00 13 6a 61 76 61 2f 69 6f 2f 50 72 69 6e 74 53 74 72 65 61 6d 01 00 11 6a 61 76 61 2f 6c 61 6e 67 2f 49 6e 74 65 67 65 72 01 00 10 6a 61 76 61 2f 6c 61 6e 67 2f 4f 62 6a 65 63 74 01 00 16 6a 61 76 61 2f 6c 61 6e 67 2f 53 74 72 69 6e 67 42 75 66 66 65 72 01 00 10 6a 61 76 61 2f 6c 61 6e 67 2f 53 79 73 74 65 6d 01 00 04 6d 61 69 6e 01 00 03 6f 75 74 01 00 05 70 72 69 6e 74 01 00 07 70 72 69 6e 74 6c 6e 01 00 04 72 65 61 64 01 00 0b 74 6f 48 65 78 53 74 72 69 6e 67 01 00 08 74 6f 53 74 72 69 6e 67 01 00 21 e3 83 95 e3 82 a1 e3 82 a4 e3 83 ab e3 81 8c e9 96 8b e3 81 91 e3 81 be e3 81 9b e3 82 93 ef bc 9a 01 00 18 e5 85 a5 e5 87 ba e5 8a 9b e3 82 a8 e3 83 a9 e3 83 bc e3 81 a7 e3 81 99 00 20 00 04 00 0c 00 00 00 00 00 02 00 09 00 4d 00 34 00 01 00 37 00 00 00 f3 00 06 00 04 00 00 00 87 bb 00 05 59 bb 00 06 59 2a 03 32 b7 00 11 b7 00 10 4c 04 3e a7 00 41 b2 00 16 1c 10 10 a2 00 19 bb 00 0d 59 12 01 b7 00 12 1c b8 00 1c b6 00 13 b6 00 1d a7 00 07 1c b8 00 1c b6 00 18 b2 00 16 10 20 b6 00 17 1d 10 0f 7e 9a 00 09 b2 00 16 b6 00 19 84 03 01 2b b6 00 1b 59 3d 9c ff bc 2b b6 00 14 b1 57 b2 00 15 bb 00 0d 59 12 02 b7 00 12 2a 03 32 b6 00 13 b6 00 1d b6 00 1a b1 57 b2 00 15 12 03 b6 00 1a b1 00 02 00 00 00 62 00 63 00 07 00 00 00 62 00 7d 00 08 00 01 00 3a 00 00 00 4a 00 12 00 00 00 06 00 00 00 08 00 12 00 0a 00 14 00 0d 00 17 00 0e 00 3d 00 0f 00 45 00 12 00 4c 00 13 00 52 00 15 00 55 00 0d 00 5e 00 19 00 62 00 06 00 63 00 1b 00 64 00 1c 00 7c 00 06 00 7d 00 1d 00 7e 00 1e 00 86 00 05 00 00 00 36 00 2e 00 01 00 37 00 00 00 1d 00 01 00 01 00 00 00 05 2a b7 00 0f b1 00 00 00 01 00 3a 00 00 00 06 00 01 00 00 00 04 00 01 00 3d 00 00 00 02 00 3f C:\Java\>

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