java.io

Class PrintStream

java.lang.Object

java.io.OutputStream

java.io.PrintStream

All Implemented Interfaces:

AutoCloseable

public class PrintStream
extends OutputStream

A PrintStream adds functionality to another output stream, namely the ability to print representations of various data values conveniently. Two other features are provided as well. Unlike other output streams, a PrintStream never throws an IOException; instead, exceptional situations merely set an internal flag that can be tested via the checkError method. All characters printed by a PrintStream are converted into bytes using the platform's default character encoding. Since: JDK1.0, CLDC 1.0

Constructor Summary

Constructors

Constructor and Description
PrintStream(OutputStream out) Create a new print stream.

Method Summary

Modifier and Type	Method and Description
boolean	checkError() Flush the stream and check its error state.
void	close() Close the stream.
void	flush() Flush the stream.
void	print(boolean b) Print a boolean value.
void	print(char c) Print an array of characters.
void	print(double d) Print a double-precision floating point number.
void	print(float f) Print a floating point number.
void	print(int i) Print an integer.
void	print(long l) Print a long integer.
void	print(Object obj) Print an object.
void	print(String s) Print a string.
void	println() Terminate the current line by writing the line separator string.
void	println(boolean x) Print a boolean and then terminate the line.
void	println(char x) Print an array of characters and then terminate the line.
void	println(double x) Print a double and then terminate the line.
void	println(float x) Print a float and then terminate the line.
void	println(int x) Print an integer and then terminate the line.
void	println(long x) Print a long and then terminate the line.
void	println(Object x) Print an Object and then terminate the line.
void	println(String x) Print a String and then terminate the line.
protected void	setError() Set the error state of the stream to true.
void	write(byte[] buf, int off, int len) Write len bytes from the specified byte array starting at offset off to this stream.
void	write(int b) Write the specified byte to this stream.

Methods inherited from class java.io.OutputStream

write

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PrintStream

public PrintStream(OutputStream out)

Create a new print stream. This stream will not flush automatically. out - The output stream to which values and objects will be printed

Method Detail

checkError

public boolean checkError()

Flush the stream and check its error state. The internal error state is set to true when the underlying output stream throws an IOException, and when the setError method is invoked.

close

public void close()

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

Specified by:

close in interface AutoCloseable

Overrides:

close in class OutputStream

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 OutputStream

print

public void print(boolean b)

Print a boolean value. The string produced by is translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the method.

print

public void print(char c)

Print an array of characters. The characters are converted into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the method.

print

public void print(double d)

Print a double-precision floating point number. The string produced by is translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the method.

print

public void print(float f)

Print a floating point number. The string produced by is translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the method.

print

public void print(int i)

Print an integer. The string produced by is translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the method.

print

public void print(long l)

Print a long integer. The string produced by is translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the method.

print

public void print(Object obj)

Print an object. The string produced by the method is translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the method.

print

public void print(String s)

Print a string. If the argument is null then the string "null" is printed. Otherwise, the string's characters are converted into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the method.

println

public void println()

Terminate the current line by writing the line separator string. 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 terminate the line. This method behaves as though it invokes and then .

println

public void println(char x)

Print an array of characters and then terminate the line. This method behaves as though it invokes and then .

println

public void println(double x)

Print a double and then terminate the line. This method behaves as though it invokes and then .

println

public void println(float x)

Print a float and then terminate the line. This method behaves as though it invokes and then .

println

public void println(int x)

Print an integer and then terminate the line. This method behaves as though it invokes and then .

println

public void println(long x)

Print a long and then terminate the line. This method behaves as though it invokes and then .

println

public void println(Object x)

Print an Object and then terminate the line. This method behaves as though it invokes and then .

println

public void println(String x)

Print a String and then terminate the line. This method behaves as though it invokes and then .

setError

protected void setError()

Set the error state of the stream to true.

write

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

Write len bytes from the specified byte array starting at offset off to this stream. Note that the bytes will be written as given; to write characters that will be translated according to the platform's default character encoding, use the print(char) or println(char) methods.

Overrides:

write in class OutputStream

write

public void write(int b)

Write the specified byte to this stream. 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.

Specified by:

write in class OutputStream