Closeable, DataOutput, Flushable, AutoCloseable
A DataOutputStream is not safe for use by multiple concurrent threads. If a DataOutputStream is to be used by more than one thread then access to the data output stream should be controlled by appropriate synchronization.
Fields
protected int
The number of bytes written to the data output stream so far.
Constructors
Creates a new data output stream to write data to the specified underlying output stream.
void
Flushes this data output stream.
final int
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
Writes the specified byte (the low eight bits of the argument b) to the underlying output stream.
final void
Writes a boolean to the underlying output stream as a 1-byte value.
final void
Writes out a byte to the underlying output stream as a 1-byte value.
final void
Writes out the string to the underlying output stream as a sequence of bytes.
final void
Writes a char to the underlying output stream as a 2-byte value, high byte first.
final void
Writes a string to the underlying output stream as a sequence of characters.
final void
Converts the double argument to a long using the doubleToLongBits method in class Double, and then writes that long value to the underlying output stream as an 8-byte quantity, high byte first.
final void
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.
final void
Writes an int to the underlying output stream as four bytes, high byte first.
final void
Writes a long to the underlying output stream as eight bytes, high byte first.
final void
Writes a short to the underlying output stream as two bytes, high byte first.
final void
Writes a string to the underlying output stream using
modified UTF-8encoding in a machine-independent manner.
Methods declared in class java.lang.Objectclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitprotected int written
The number of bytes written to the data output stream so far. If this counter overflows, it will be wrapped to Integer.MAX_VALUE.
Creates a new data output stream to write data to the specified underlying output stream. The counter written is set to zero.
out - the underlying output stream, to be saved for later use.
Writes the specified byte (the low eight bits of the argument
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 interface DataOutput
write in class FilterOutputStream
b - the byte to be written.
IOException - if an I/O error occurs.
throws
IOExceptionWrites 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 interface DataOutput
write in class FilterOutputStream
b - the data.
off - the start offset in the data.
len - the number of bytes to write.
IOException - if an I/O error occurs.
The flush method of DataOutputStream calls the flush method of its underlying output stream.
flush in interface Flushable
flush in class FilterOutputStream
IOException - if an I/O error occurs.
throws
IOExceptionWrites a 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.
writeBoolean in interface DataOutput
v - a boolean value to be written.
IOException - if an I/O error occurs.
Writes out a byte to the underlying output stream as a 1-byte value. If no exception is thrown, the counter written is incremented by 1.
writeByte in interface DataOutput
v - a byte value to be written.
IOException - if an I/O error occurs.
Writes a short to the underlying output stream as two bytes, high byte first. If no exception is thrown, the counter written is incremented by 2.
writeShort in interface DataOutput
v - a short to be written.
IOException - if an I/O error occurs.
Writes a 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.
writeChar in interface DataOutput
v - a char value to be written.
IOException - if an I/O error occurs.
Writes an int to the underlying output stream as four bytes, high byte first. If no exception is thrown, the counter written is incremented by 4.
writeInt in interface DataOutput
v - an int to be written.
IOException - if an I/O error occurs.
Writes a long to the underlying output stream as eight bytes, high byte first. In no exception is thrown, the counter written is incremented by 8.
writeLong in interface DataOutput
v - a long to be written.
IOException - if an I/O error occurs.
throws
IOExceptionConverts 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. If no exception is thrown, the counter written is incremented by 4.
writeFloat in interface DataOutput
v - a float value to be written.
IOException - if an I/O error occurs.
throws
IOExceptionConverts the double argument to a long using the doubleToLongBits method in class Double, and then writes that long value to the underlying output stream as an 8-byte quantity, high byte first. If no exception is thrown, the counter written is incremented by 8.
writeDouble in interface DataOutput
v - a double value to be written.
IOException - if an I/O error occurs.
Writes out the string to the underlying output stream as a sequence of bytes. Each character in the string is written out, in sequence, by discarding its high eight bits. If no exception is thrown, the counter written is incremented by the length of s.
writeBytes in interface DataOutput
s - a string of bytes to be written.
IOException - if an I/O error occurs.
Writes a string to the underlying output stream as a sequence of characters. Each character is written to the data output stream as if by the writeChar method. If no exception is thrown, the counter written is incremented by twice the length of s.
writeChars in interface DataOutput
s - a String value to be written.
IOException - if an I/O error occurs.
Writes a string to the underlying output stream using
modified UTF-8encoding in a machine-independent manner.
First, two bytes are written to the output stream as if by the writeShort method giving the number of bytes to follow. This value is the number of bytes actually written out, not the length of the string. Following the length, each character of the string is output, in sequence, using the modified UTF-8 encoding for the character. If no exception is thrown, the counter written is incremented by the total number of bytes written to the output stream. This will be at least two plus the length of str, and at most two plus thrice the length of str.
writeUTF in interface DataOutput
str - a string to be written.
UTFDataFormatException - if the modified UTF-8 encoding of str would exceed 65535 bytes in length
IOException - if some other I/O error occurs.
public final int size()
Returns the current value of the counter 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.
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