Class java.io.PrintStream





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Class java.io.PrintStream


java.lang.Object
|
+----java.io.OutputStream
|
+----java.io.FilterOutputStream
|
+----java.io.PrintStream



public class PrintStream
extends FilterOutputStream

Print values and objects to an output stream, using the platform's default
character encoding to convert characters into bytes.
If automatic flushing is enabled at creation time, then the stream will
be flushed each time a line is terminated or a newline character is written.
Methods in this class never throw I/O exceptions. Client code may
inquire as to whether any errors have occurred by invoking the
checkError method.
Note: This class is provided primarily for use in debugging,
and for compatibility with existing code; new code should use the
PrintWriter class.


See Also:
PrintWriter








PrintStream(OutputStream)
Create a new print stream.
Deprecated.

PrintStream(OutputStream, boolean)
Create a new PrintStream.
Deprecated.






checkError()
Flush the stream and check its error state.

close()
Close the stream.

flush()
Flush the stream.

print(boolean)
Print a boolean value.

print(char)
Print a character.

print(char[])
Print an array of characters.

print(double)
Print a double-precision floating-point number.

print(float)
Print a floating-point number.

print(int)
Print an integer.

print(long)
Print a long integer.

print(Object)
Print an object.

print(String)
Print a string.

println()
Finish the current line by writing a line separator.

println(boolean)
Print a boolean, and then finish the line.

println(char)
Print a character, and then finish the line.

println(char[])
Print an array of characters, and then finish the line.

println(double)
Print a double, and then finish the line.

println(float)
Print a float, and then finish the line.

println(int)
Print an integer, and then finish the line.

println(long)
Print a long, and then finish the line.

println(Object)
Print an Object, and then finish the line.

println(String)
Print a String, and then finish the line.

setError()
Indicate that an error has occurred.

write(byte[], int, int)
Write a portion of a byte array, blocking if necessary.

write(int)
Write a byte, blocking if necessary.







PrintStream

public PrintStream(OutputStream out)


Note: PrintStream() is deprecated.
As of JDK 1.1, the preferred way to print text is
via the PrintWriter class. Consider replacing code of the
form   PrintStream p = new PrintStream(out);
with   PrintWriter p = new PrintWriter(out);

Create a new print stream.


Parameters:
out - The output stream to which values and objects will be
printed
See Also:
PrintWriter



PrintStream

public PrintStream(OutputStream out,
boolean autoFlush)


Note: PrintStream() is deprecated.
As of JDK 1.1, the preferred way to print text is
via the PrintWriter class. Consider replacing code of the
form   PrintStream p = new PrintStream(out, autoFlush);
with   PrintWriter p = new PrintWriter(out, autoFlush);

Create a new PrintStream.


Parameters:
out - The output stream to which values and objects will be
printed
autoFlush - A boolean; if true, the output buffer will be flushed
whenever a line is terminated or a newline character
('\n') is written
See Also:
PrintWriter







flush

public void flush()


Flush the stream. This is done by writing any buffered output bytes to
the underlying output stream and then flushing that stream.


Overrides:
flush in class FilterOutputStream
See Also:
flush



close

public void close()


Close the stream. This is done by flushing the stream and then closing
the underlying output stream.


Overrides:
close in class FilterOutputStream
See Also:
close



checkError

public boolean checkError()


Flush the stream and check its error state. Errors are cumulative;
once the stream encounters an error, this routine will continue to
return true on all successive calls.


Returns:
True if the print stream has encountered an error, either on the
underlying output stream or during a format conversion, otherwise false.



setError

protected void setError()


Indicate that an error has occurred.



write

public void write(int b)


Write a byte, blocking if necessary. If the character is a newline and
automatic flushing is enabled, the stream's flush method
will be called.
Note that the byte is written as given; to write a character that
will be translated according to the platform's default character
encoding, use the print(char) or println(char)
methods.


Parameters:
b - The byte to be written
Overrides:
write in class FilterOutputStream
See Also:
print, println



write

public void write(byte buf[],
int off,
int len)


Write a portion of a byte array, blocking if necessary.


Parameters:
buf - A byte array
off - Offset from which to start taking bytes
len - Number of bytes to write
Overrides:
write in class FilterOutputStream



print

public void print(boolean b)


Print a boolean value. If the given value is true, then the string
"true" is written to the underlying output stream;
otherwise, the string "false" is written.


Parameters:
b - The boolean to be printed



print

public void print(char c)


Print a character. The character is translated into one or more bytes
according to the platform's default character encoding.


Parameters:
c - The char to be printed



print

public void print(int i)


Print an integer. The string printed is the same as that returned by
the toString method of the Integer class when
invoked on the given int value.


Parameters:
i - The int to be printed
See Also:
toString



print

public void print(long l)


Print a long integer. The string printed is the same as that returned
by the toString method of the Long class when
invoked on the given long value.


Parameters:
l - The long to be printed
See Also:
toString



print

public void print(float f)


Print a floating-point number. The string printed is the same as that
returned by the toString method of the Float
class when invoked on the given float value.


Parameters:
f - The float to be printed
See Also:
toString



print

public void print(double d)


Print a double-precision floating-point number. The string printed is
the same as that returned by the toString method of the
Double class when invoked on the given double
value.


Parameters:
d - The double to be printed
See Also:
toString



print

public void print(char s[])


Print an array of characters. The characters are converted into bytes
according to the platform's default character encoding.


Parameters:
s - The array of chars to be printed



print

public void print(String s)


Print a string. If the argument is null, the string
"null" is written to the underlying output stream.
Otherwise, the string's characters are converted into bytes according to
the platform's default character encoding.


Parameters:
s - The String to be printed



print

public void print(Object obj)


Print an object. The string printed is the same as that returned by the
given object's toString method.


Parameters:
obj - The Object to be printed
See Also:
toString



println

public void println()


Finish the current line by writing a line separator. The line
separator string is defined by the system property
line.separator, and is not necessarily a single newline
character ('\n').



println

public void println(boolean x)


Print a boolean, and then finish the line.


See Also:
print



println

public void println(char x)


Print a character, and then finish the line.


See Also:
print



println

public void println(int x)


Print an integer, and then finish the line.


See Also:
print



println

public void println(long x)


Print a long, and then finish the line.


See Also:
print



println

public void println(float x)


Print a float, and then finish the line.


See Also:
print



println

public void println(double x)


Print a double, and then finish the line.


See Also:
print



println

public void println(char x[])


Print an array of characters, and then finish the line.


See Also:
print



println

public void println(String x)


Print a String, and then finish the line.


See Also:
print



println

public void println(Object x)


Print an Object, and then finish the line.


See Also:
print




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