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java.lang.Objectjava.io.OutputStream
java.io.DataOutputStream
public class DataOutputStream
| Field Summary | |
|---|---|
protected OutputStream |
out
|
protected int |
written
|
| Constructor Summary | |
|---|---|
DataOutputStream(OutputStream out)
|
|
| Method Summary | |
|---|---|
void |
flush()
Flushes this data output stream. |
int |
size()
Returns the current value of the counter written,
the number of bytes written to this data output stream so far. |
void |
write(byte[] b,
int off,
int len)
Writes len bytes from the specified byte array
starting at offset off to the underlying output stream. |
void |
write(int b)
Writes the specified byte (the low eight bits of the argument b) to the underlying output stream. |
void |
writeBoolean(boolean v)
Writes a boolean to the underlying output stream as
a 1-byte value. |
void |
writeByte(int v)
Writes out a byte to the underlying output stream as
a 1-byte value. |
void |
writeChar(int v)
Writes a char to the underlying output stream as a
2-byte value, high byte first. |
void |
writeFloat(float v)
Converts the float argument to an int using the
floatToIntBits method in class Float,
and then writes that int value to the underlying
output stream as a 4-byte quantity, high byte first. |
void |
writeInt(int v)
Writes an int to the underlying output stream as four
bytes, high byte first. |
void |
writeShort(int v)
Writes a short to the underlying output stream as two
bytes, high byte first. |
| Methods inherited from class java.io.OutputStream |
|---|
close, write |
| Methods inherited from class java.lang.Object |
|---|
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait |
| Field Detail |
|---|
protected int written
protected OutputStream out
| Constructor Detail |
|---|
public DataOutputStream(OutputStream out)
| Method Detail |
|---|
public void write(int b)
throws IOException
b) to the underlying output stream. If no exception
is thrown, the counter written is incremented by
1.
Implements the write method of OutputStream.
write in class OutputStreamb - the byte to be written.
IOException - if an I/O error occurs.FilterOutputStream.out
public void write(byte[] b,
int off,
int len)
throws IOException
len bytes from the specified byte array
starting at offset off to the underlying output stream.
If no exception is thrown, the counter written is
incremented by len.
write in class OutputStreamb - the data.off - the start offset in the data.len - the number of bytes to write.
IOException - if an I/O error occurs.FilterOutputStream.out
public void flush()
throws IOException
The flush method of DataOuputStream
calls the flush method of its underlying output stream.
flush in class OutputStreamIOException - if an I/O error occurs.FilterOutputStream.out,
OutputStream.flush()
public final void writeBoolean(boolean v)
throws IOException
boolean to the underlying output stream as
a 1-byte value. The value true is written out as the
value (byte)1; the value false is
written out as the value (byte)0. If no exception is
thrown, the counter written is incremented by
1.
v - a boolean value to be written.
IOException - if an I/O error occurs.FilterOutputStream.out
public final void writeByte(int v)
throws IOException
byte to the underlying output stream as
a 1-byte value. If no exception is thrown, the counter
written is incremented by 1.
v - a byte value to be written.
IOException - if an I/O error occurs.FilterOutputStream.out
public final void writeShort(int v)
throws IOException
short to the underlying output stream as two
bytes, high byte first. If no exception is thrown, the counter
written is incremented by 2.
v - a short to be written.
IOException - if an I/O error occurs.FilterOutputStream.out
public final void writeChar(int v)
throws IOException
char to the underlying output stream as a
2-byte value, high byte first. If no exception is thrown, the
counter written is incremented by 2.
v - a char value to be written.
IOException - if an I/O error occurs.FilterOutputStream.out
public final void writeInt(int v)
throws IOException
int to the underlying output stream as four
bytes, high byte first. If no exception is thrown, the counter
written is incremented by 4.
v - an int to be written.
IOException - if an I/O error occurs.FilterOutputStream.out
public final void writeFloat(float v)
throws IOException
int using the
floatToIntBits method in class Float,
and then writes that int value to the underlying
output stream as a 4-byte quantity, high byte first. If no
exception is thrown, the counter written is
incremented by 4.
v - a float value to be written.
IOException - if an I/O error occurs.FilterOutputStream.out,
Float.floatToIntBits(float)public final int size()
written,
the number of bytes written to this data output stream so far.
If the counter overflows, it will be wrapped to Integer.MAX_VALUE.
written field.written
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