--- title: "Class DataOutputStream" --- `package java.io` ```text java.lang.Object | +--java.io.OutputStream | +--java.io.DataOutputStream ``` ## 설명 **All Implemented Interfaces:** - `DataOutput` **implements DataOutput:** 자바에서 지원하는 타입 객체를 바이트 스트림으로 변환해 출력할 수 있도록 만든 출력 스트림 클래스. ## 필드 요약 - `protected OutputStream out` — 실제 출력할 출력스트림. - `protected  int written` — out로 출력한 바이트 갯수. ## 생성자 요약 - DataOutputStream ( OutputStream out) 새로운 객체를 만든다. ## 메서드 요약 - `void close ()` — 출력 스트림을 닫는다. - `void flush ()` — 중간 버퍼에 남아있는 정보들을 실제 출력하도록 한다. - `void write (byte[] buf, int offset, int len)` — 바이트 배열의 일부분을 출력한다. - `void write (int b)` — 매개변수로 받은 변수 값 중 상위 24비트는 버리고 나머지 8비트만 출력한다. - `void writeBoolean (boolean b)` — 매개변수 값이 true이면 1 false이면 0을 출력한다. - `void writeByte (int b)` — 매개변수로 받은 변수 값 중 상위 24비트는 버리고 나머지 8비트만 출력한다. - `void writeChar (int c)` — 매개변수로 받은 변수 값 중 상위 16비트는 버리고 8~15비트까지 출력하고 이어 하위 8비트를 출력한다. - `void writeChars ( String s)` — 문자열을 구성하는 문자들을 인덱스 0 부터 차례대로 출력한다. - `void writeDouble (double v)` - `void writeFloat (float v)` - `void writeInt (int i)` — 매개변수로 받은 변수 값 중 상위 8비트부터 차례대로 8비트 단위로 출력한다. - `void writeLong (long l)` — 매개변수로 받은 변수 값 중 상위 8비트부터 차례대로 8비트 단위로 출력한다. - `void writeShort (int s)` — 매개변수로 받은 변수 값 중 상위 16비트는 버리고 8~15비트까지 출력하고 이어 하위 8비트를 출력한다. - `void writeUTF ( String s)` — 문자열을 UTF형식으로 바꿔 출력한다. ## 필드 상세 ### written ```java protected int written ``` - out로 출력한 바이트 갯수. ### out ```java protected OutputStream out ``` - 실제 출력할 출력스트림. ### DataOutputStream ```java public DataOutputStream(OutputStream out) ``` **Parameters:** - `out` - 실제 바이트 정보가 출력될 출력 스트림. ### write ```java public void write(int b) throws IOException ``` **Specified by:** - `write` in interface `DataOutput` **Overrides:** - `write` in class `OutputStream` **Parameters:** - `b` - 출력할 정보. **Throws:** - `IOException` - ### write ```java public void write(byte[] buf, int offset, int len) throws IOException ``` **Specified by:** - `write` in interface `DataOutput` **Overrides:** - `write` in class `OutputStream` **Parameters:** - `len` - 출력할 갯수. **Throws:** - `IOException` - ### flush ```java public void flush() throws IOException ``` **Overrides:** - `flush` in class `OutputStream` - Following copied from class: `java.io.OutputStream` **Throws:** - `IOException` - ### close ```java public void close() throws IOException ``` **Overrides:** - `close` in class `OutputStream` **Throws:** - `IOException` - ### writeBoolean ```java public final void writeBoolean(boolean b) throws IOException ``` **Specified by:** - `writeBoolean` in interface `DataOutput` **Parameters:** - `b` - 출력할 boolean변수. **Throws:** - `IOException` - ### writeByte ```java public final void writeByte(int b) throws IOException ``` **Specified by:** - `writeByte` in interface `DataOutput` **Parameters:** - `b` - 출력할 정보. **Throws:** - `IOException` - ### writeShort ```java public final void writeShort(int s) throws IOException ``` **Specified by:** - `writeShort` in interface `DataOutput` **Parameters:** - `s` - 출력할 정보. **Throws:** - `IOException` - ### writeChar ```java public final void writeChar(int c) throws IOException ``` **Specified by:** - `writeChar` in interface `DataOutput` **Parameters:** - `c` - 출력할 정보. **Throws:** - `IOException` - ### writeInt ```java public final void writeInt(int i) throws IOException ``` **Specified by:** - `writeInt` in interface `DataOutput` **Parameters:** - `i` - 출력할 정보. **Throws:** - `IOException` - ### writeLong ```java public final void writeLong(long l) throws IOException ``` **Specified by:** - `writeLong` in interface `DataOutput` **Parameters:** - `l` - 출력할 정보. **Throws:** - `IOException` - ### writeFloat ```java public final void writeFloat(float v) throws IOException ``` **Specified by:** - `writeFloat` in interface `DataOutput` ### writeDouble ```java public final void writeDouble(double v) throws IOException ``` **Specified by:** - `writeDouble` in interface `DataOutput` ### writeChars ```java public final void writeChars(String s) throws IOException ``` **Specified by:** - `writeChars` in interface `DataOutput` **Parameters:** - `s` - 출력할 문자열. **Throws:** - `IOException` - ### writeUTF ```java public final void writeUTF(String s) throws IOException ``` **Specified by:** - `writeUTF` in interface `DataOutput` **Parameters:** - `str` - 출력할 문자열. **Throws:** - `IOException` -## 생성자 상세 ### DataOutputStream ```java public DataOutputStream(OutputStream out) ``` **Parameters:** - `out` - 실제 바이트 정보가 출력될 출력 스트림. ### write ```java public void write(int b) throws IOException ``` **Specified by:** - `write` in interface `DataOutput` **Overrides:** - `write` in class `OutputStream` **Parameters:** - `b` - 출력할 정보. **Throws:** - `IOException` - ### write ```java public void write(byte[] buf, int offset, int len) throws IOException ``` **Specified by:** - `write` in interface `DataOutput` **Overrides:** - `write` in class `OutputStream` **Parameters:** - `len` - 출력할 갯수. **Throws:** - `IOException` - ### flush ```java public void flush() throws IOException ``` **Overrides:** - `flush` in class `OutputStream` - Following copied from class: `java.io.OutputStream` **Throws:** - `IOException` - ### close ```java public void close() throws IOException ``` **Overrides:** - `close` in class `OutputStream` **Throws:** - `IOException` - ### writeBoolean ```java public final void writeBoolean(boolean b) throws IOException ``` **Specified by:** - `writeBoolean` in interface `DataOutput` **Parameters:** - `b` - 출력할 boolean변수. **Throws:** - `IOException` - ### writeByte ```java public final void writeByte(int b) throws IOException ``` **Specified by:** - `writeByte` in interface `DataOutput` **Parameters:** - `b` - 출력할 정보. **Throws:** - `IOException` - ### writeShort ```java public final void writeShort(int s) throws IOException ``` **Specified by:** - `writeShort` in interface `DataOutput` **Parameters:** - `s` - 출력할 정보. **Throws:** - `IOException` - ### writeChar ```java public final void writeChar(int c) throws IOException ``` **Specified by:** - `writeChar` in interface `DataOutput` **Parameters:** - `c` - 출력할 정보. **Throws:** - `IOException` - ### writeInt ```java public final void writeInt(int i) throws IOException ``` **Specified by:** - `writeInt` in interface `DataOutput` **Parameters:** - `i` - 출력할 정보. **Throws:** - `IOException` - ### writeLong ```java public final void writeLong(long l) throws IOException ``` **Specified by:** - `writeLong` in interface `DataOutput` **Parameters:** - `l` - 출력할 정보. **Throws:** - `IOException` - ### writeFloat ```java public final void writeFloat(float v) throws IOException ``` **Specified by:** - `writeFloat` in interface `DataOutput` ### writeDouble ```java public final void writeDouble(double v) throws IOException ``` **Specified by:** - `writeDouble` in interface `DataOutput` ### writeChars ```java public final void writeChars(String s) throws IOException ``` **Specified by:** - `writeChars` in interface `DataOutput` **Parameters:** - `s` - 출력할 문자열. **Throws:** - `IOException` - ### writeUTF ```java public final void writeUTF(String s) throws IOException ``` **Specified by:** - `writeUTF` in interface `DataOutput` **Parameters:** - `str` - 출력할 문자열. **Throws:** - `IOException` -## 메서드 상세 ### write ```java public void write(int b) throws IOException ``` **Specified by:** - `write` in interface `DataOutput` **Overrides:** - `write` in class `OutputStream` **Parameters:** - `b` - 출력할 정보. **Throws:** - `IOException` - ### write ```java public void write(byte[] buf, int offset, int len) throws IOException ``` **Specified by:** - `write` in interface `DataOutput` **Overrides:** - `write` in class `OutputStream` **Parameters:** - `len` - 출력할 갯수. **Throws:** - `IOException` - ### flush ```java public void flush() throws IOException ``` **Overrides:** - `flush` in class `OutputStream` - Following copied from class: `java.io.OutputStream` **Throws:** - `IOException` - ### close ```java public void close() throws IOException ``` **Overrides:** - `close` in class `OutputStream` **Throws:** - `IOException` - ### writeBoolean ```java public final void writeBoolean(boolean b) throws IOException ``` **Specified by:** - `writeBoolean` in interface `DataOutput` **Parameters:** - `b` - 출력할 boolean변수. **Throws:** - `IOException` - ### writeByte ```java public final void writeByte(int b) throws IOException ``` **Specified by:** - `writeByte` in interface `DataOutput` **Parameters:** - `b` - 출력할 정보. **Throws:** - `IOException` - ### writeShort ```java public final void writeShort(int s) throws IOException ``` **Specified by:** - `writeShort` in interface `DataOutput` **Parameters:** - `s` - 출력할 정보. **Throws:** - `IOException` - ### writeChar ```java public final void writeChar(int c) throws IOException ``` **Specified by:** - `writeChar` in interface `DataOutput` **Parameters:** - `c` - 출력할 정보. **Throws:** - `IOException` - ### writeInt ```java public final void writeInt(int i) throws IOException ``` **Specified by:** - `writeInt` in interface `DataOutput` **Parameters:** - `i` - 출력할 정보. **Throws:** - `IOException` - ### writeLong ```java public final void writeLong(long l) throws IOException ``` **Specified by:** - `writeLong` in interface `DataOutput` **Parameters:** - `l` - 출력할 정보. **Throws:** - `IOException` - ### writeFloat ```java public final void writeFloat(float v) throws IOException ``` **Specified by:** - `writeFloat` in interface `DataOutput` ### writeDouble ```java public final void writeDouble(double v) throws IOException ``` **Specified by:** - `writeDouble` in interface `DataOutput` ### writeChars ```java public final void writeChars(String s) throws IOException ``` **Specified by:** - `writeChars` in interface `DataOutput` **Parameters:** - `s` - 출력할 문자열. **Throws:** - `IOException` - ### writeUTF ```java public final void writeUTF(String s) throws IOException ``` **Specified by:** - `writeUTF` in interface `DataOutput` **Parameters:** - `str` - 출력할 문자열. **Throws:** - `IOException` - ***AromaSoft Corp. 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