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Class java.io.PrintWriter

Object
   |
   +----Writer
           |
           +----java.io.PrintWriter

public class PrintWriter

extends Writer

Unlike the PrintStream class, if automatic flushing is enabled it will be done only when one of the println() methods is invoked, rather than whenever a newline character happens to be output. The println() methods use the platform's own notion of line separator rather than the newline character.

Methods in this class never throw I/O exceptions. The client may inquire as to whether any errors have occurred by invoking checkError().

Version:

1.11, 97/01/27

Author:

Frank Yellin, Mark Reinhold

Since:

JDK1.1

java.io.PrintWriter(Writer)

Create a new PrintWriter, without automatic line flushing.

java.io.PrintWriter(Writer, boolean)

Create a new PrintWriter.

java.io.PrintWriter(OutputStream)

Create a new PrintWriter, without automatic line flushing, from an existing OutputStream.

java.io.PrintWriter(OutputStream, boolean)

Create a new PrintWriter from an existing OutputStream.

checkError()

Flush the stream and check its error state.

close()

Close the stream.

flush()

Flush the stream.

print(boolean)

Print a boolean.

print(char)

Print a character.

print(int)

Print an integer.

print(long)

Print a long.

print(float)

Print a float.

print(double)

Print a double.

print(char[])

Print an array of chracters.

print(String)

Print a String.

print(Object)

Print an object.

println()

Finish the line.

println(boolean)

Print a boolean, and then finish the line.

println(char)

Print a character, 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(float)

Print a float, and then finish the line.

println(double)

Print a double, and then finish the line.

println(char[])

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

println(String)

Print a String, and then finish the line.

println(Object)

Print an Object, and then finish the line.

setError()

Indicate that an error has occurred.

write(int)

Write a single character.

write(char[], int, int)

Write a portion of an array of characters.

write(char[])

Write an array of characters.

write(String, int, int)

Write a portion of a string.

write(String)

Write a string.

public PrintWriter(Writer out)

Create a new PrintWriter, without automatic line flushing.

Parameters:

out - A character-output stream

public PrintWriter(Writer out,
                   boolean autoFlush)

Create a new PrintWriter.

Parameters:

out - A character-output stream

autoFlush - A boolean; if true, the println() methods will flush the output buffer

public PrintWriter(OutputStream out)

Create a new PrintWriter, without automatic line flushing, from an existing OutputStream. This convenience constructor creates the necessary intermediate OutputStreamWriter, which will convert characters into bytes using the default character encoding.

Parameters:

out - An output stream

See Also:

OutputStreamWriter(java.io.OutputStream)

public PrintWriter(OutputStream out,
                   boolean autoFlush)

Create a new PrintWriter from an existing OutputStream. This convenience constructor creates the necessary intermediate OutputStreamWriter, which will convert characters into bytes using the default character encoding.

Parameters:

out - An output stream

autoFlush - A boolean; if true, the println() methods will flush the output buffer

See Also:

OutputStreamWriter(java.io.OutputStream)

public boolean checkError()

Flush the stream and check its error state. Errors are cumulative; once the stream encounters an error, this routine will 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.

public void close()

Close the stream.

Overrides:

close in class Writer

public void flush()

Flush the stream.

Overrides:

flush in class Writer

public void print(boolean b)

Print a boolean.

public void print(char c)

Print a character.

public void print(int i)

Print an integer.

public void print(long l)

Print a long.

public void print(float f)

Print a float.

public void print(double d)

Print a double.

public void print(char s)

Print an array of chracters.

public void print(String s)

Print a String.

public void print(Object obj)

Print an object.

public void println()

Finish the line.

public void println(boolean x)

Print a boolean, and then finish the line.

public void println(char x)

Print a character, and then finish the line.

public void println(int x)

Print an integer, and then finish the line.

public void println(long x)

Print a long, and then finish the line.

public void println(float x)

Print a float, and then finish the line.

public void println(double x)

Print a double, and then finish the line.

public void println(char x)

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

public void println(String x)

Print a String, and then finish the line.

public void println(Object x)

Print an Object, and then finish the line.

protected void setError()

Indicate that an error has occurred.

public void write(int c)

Write a single character.

Overrides:

write in class Writer

public void write(char buf,
                  int off,
                  int len)

Write a portion of an array of characters.

Overrides:

write in class Writer

public void write(char buf)

Write an array of characters. This method cannot be inherited from the Writer class because it must suppress I/O exceptions.

Overrides:

write in class Writer

public void write(String s,
                  int off,
                  int len)

Write a portion of a string.

Overrides:

write in class Writer

public void write(String s)

Write a string. This method cannot be inherited from the Writer class because it must suppress I/O exceptions.

Overrides:

write in class Writer

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