since: 1.2 -

 public PrintWriter(Writer out) 
{
        this(out, false);
}

Creates a new PrintWriter, without automatic line flushing.

Parameters:

out - A character-output stream

 public PrintWriter(OutputStream out) 
{
        this(out, false);
}

Creates 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

Also see:

java.io.OutputStreamWriter#OutputStreamWriter(java.io.OutputStream)

 public PrintWriter(String fileName) throws FileNotFoundException 
{
        this(new BufferedWriter(new OutputStreamWriter(new FileOutputStream(fileName))),
             false);
}

Creates a new PrintWriter, without automatic line flushing, with the specified file name. This convenience constructor creates the necessary intermediate OutputStreamWriter , which will encode characters using the {@linkplain java.nio.charset.Charset#defaultCharset() default charset} for this instance of the Java virtual machine.

Parameters:

fileName - The name of the file to use as the destination of this writer. If the file exists then it will be truncated to zero size; otherwise, a new file will be created. The output will be written to the file and is buffered.

Throws:

FileNotFoundException - If the given string does not denote an existing, writable regular file and a new regular file of that name cannot be created, or if some other error occurs while opening or creating the file

SecurityException - If a security manager is present and checkWrite(fileName) denies write access to the file

since: 1.5 -

 public PrintWriter(File file) throws FileNotFoundException 
{
        this(new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file))),
             false);
}

Creates a new PrintWriter, without automatic line flushing, with the specified file. This convenience constructor creates the necessary intermediate OutputStreamWriter , which will encode characters using the {@linkplain java.nio.charset.Charset#defaultCharset() default charset} for this instance of the Java virtual machine.

Parameters:

file - The file to use as the destination of this writer. If the file exists then it will be truncated to zero size; otherwise, a new file will be created. The output will be written to the file and is buffered.

Throws:

FileNotFoundException - If the given file object does not denote an existing, writable regular file and a new regular file of that name cannot be created, or if some other error occurs while opening or creating the file

SecurityException - If a security manager is present and checkWrite(file.getPath()) denies write access to the file

since: 1.5 -

 public PrintWriter(Writer out,
    boolean autoFlush) 
{
        super(out);
        this.out = out;
        this.autoFlush = autoFlush;
        lineSeparator = java.security.AccessController.doPrivileged(
            new sun.security.action.GetPropertyAction("line.separator"));
}

Creates a new PrintWriter.

Parameters:

out - A character-output stream

autoFlush - A boolean; if true, the println, printf, or format methods will flush the output buffer

 public PrintWriter(OutputStream out,
    boolean autoFlush) 
{
        this(new BufferedWriter(new OutputStreamWriter(out)), autoFlush);
        // save print stream for error propagation
        if (out instanceof java.io.PrintStream) {
            psOut = (PrintStream) out;
        }
}

Creates 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, printf, or format methods will flush the output buffer

Also see:

java.io.OutputStreamWriter#OutputStreamWriter(java.io.OutputStream)

 public PrintWriter(String fileName,
    String csn) throws FileNotFoundException, UnsupportedEncodingException 
{
        this(toCharset(csn), new File(fileName));
}

Creates a new PrintWriter, without automatic line flushing, with the specified file name and charset. This convenience constructor creates the necessary intermediate OutputStreamWriter , which will encode characters using the provided charset.

Parameters:

fileName - The name of the file to use as the destination of this writer. If the file exists then it will be truncated to zero size; otherwise, a new file will be created. The output will be written to the file and is buffered.

csn - The name of a supported {@linkplain java.nio.charset.Charset charset}

Throws:

FileNotFoundException - If the given string does not denote an existing, writable regular file and a new regular file of that name cannot be created, or if some other error occurs while opening or creating the file

SecurityException - If a security manager is present and checkWrite(fileName) denies write access to the file

UnsupportedEncodingException - If the named charset is not supported

since: 1.5 -

 public PrintWriter(File file,
    String csn) throws FileNotFoundException, UnsupportedEncodingException 
{
        this(toCharset(csn), file);
}

Creates a new PrintWriter, without automatic line flushing, with the specified file and charset. This convenience constructor creates the necessary intermediate OutputStreamWriter , which will encode characters using the provided charset.

Parameters:

file - The file to use as the destination of this writer. If the file exists then it will be truncated to zero size; otherwise, a new file will be created. The output will be written to the file and is buffered.

csn - The name of a supported {@linkplain java.nio.charset.Charset charset}

Throws:

FileNotFoundException - If the given file object does not denote an existing, writable regular file and a new regular file of that name cannot be created, or if some other error occurs while opening or creating the file

SecurityException - If a security manager is present and checkWrite(file.getPath()) denies write access to the file

UnsupportedEncodingException - If the named charset is not supported

since: 1.5 -

 public PrintWriter append(CharSequence csq) 
{
        if (csq == null)
            write("null");
        else
            write(csq.toString());
        return this;
}

Appends the specified character sequence to this writer.

An invocation of this method of the form out.append(csq) behaves in exactly the same way as the invocation

    out.write(csq.toString()) 

Depending on the specification of toString for the character sequence csq, the entire sequence may not be appended. For instance, invoking the toString method of a character buffer will return a subsequence whose content depends upon the buffer's position and limit.

 public PrintWriter append(char c) 
{
        write(c);
        return this;
}

Appends the specified character to this writer.

An invocation of this method of the form out.append(c) behaves in exactly the same way as the invocation

    out.write(c) 

 public PrintWriter append(CharSequence csq,
    int start,
    int end) 
{
        CharSequence cs = (csq == null ? "null" : csq);
        write(cs.subSequence(start, end).toString());
        return this;
}

Appends a subsequence of the specified character sequence to this writer.

An invocation of this method of the form out.append(csq, start, end) when csq is not null, behaves in exactly the same way as the invocation

    out.write(csq.subSequence(start, end).toString()) 

 public boolean checkError() 
{
        if (out != null) {
            flush();
        }
        if (out instanceof java.io.PrintWriter) {
            PrintWriter pw = (PrintWriter) out;
            return pw.checkError();
        } else if (psOut != null) {
            return psOut.checkError();
        }
        return trouble;
}

Flushes the stream if it's not closed and checks its error state.

 protected  void clearError() 
{
        trouble = false;
}

Clears the error state of this stream.

This method will cause subsequent invocations of #checkError() to return false until another write operation fails and invokes #setError() .

 public  void close() 
{
        try {
            synchronized (lock) {
                if (out == null)
                    return;
                out.close();
                out = null;
            }
        }
        catch (IOException x) {
            trouble = true;
        }
}

Closes the stream and releases any system resources associated with it. Closing a previously closed stream has no effect.

 public  void flush() 
{
        try {
            synchronized (lock) {
                ensureOpen();
                out.flush();
            }
        }
        catch (IOException x) {
            trouble = true;
        }
}

Flushes the stream.

 public PrintWriter format(String format,
    Object args) 
{
        try {
            synchronized (lock) {
                ensureOpen();
                if ((formatter == null)
                    || (formatter.locale() != Locale.getDefault()))
                    formatter = new Formatter(this);
                formatter.format(Locale.getDefault(), format, args);
                if (autoFlush)
                    out.flush();
            }
        } catch (InterruptedIOException x) {
            Thread.currentThread().interrupt();
        } catch (IOException x) {
            trouble = true;
        }
        return this;
}

Writes a formatted string to this writer using the specified format string and arguments. If automatic flushing is enabled, calls to this method will flush the output buffer.

The locale always used is the one returned by Locale.getDefault() , regardless of any previous invocations of other formatting methods on this object.

 public PrintWriter format(Locale l,
    String format,
    Object args) 
{
        try {
            synchronized (lock) {
                ensureOpen();
                if ((formatter == null) || (formatter.locale() != l))
                    formatter = new Formatter(this, l);
                formatter.format(l, format, args);
                if (autoFlush)
                    out.flush();
            }
        } catch (InterruptedIOException x) {
            Thread.currentThread().interrupt();
        } catch (IOException x) {
            trouble = true;
        }
        return this;
}

Writes a formatted string to this writer using the specified format string and arguments. If automatic flushing is enabled, calls to this method will flush the output buffer.

 public  void print(boolean b) 
{
        write(b ? "true" : "false");
}

Prints a boolean value. The string produced by java.lang.String#valueOf(boolean) is translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the #write(int) method.

 public  void print(char c) 
{
        write(c);
}

Prints a character. The character is translated into one or more bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the #write(int) method.

 public  void print(int i) 
{
        write(String.valueOf(i));
}

Prints an integer. The string produced by java.lang.String#valueOf(int) is translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the #write(int) method.

 public  void print(long l) 
{
        write(String.valueOf(l));
}

Prints a long integer. The string produced by java.lang.String#valueOf(long) is translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the #write(int) method.

 public  void print(float f) 
{
        write(String.valueOf(f));
}

Prints a floating-point number. The string produced by java.lang.String#valueOf(float) is translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the #write(int) method.

 public  void print(double d) 
{
        write(String.valueOf(d));
}

Prints a double-precision floating-point number. The string produced by java.lang.String#valueOf(double) is translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the #write(int) method.

 public  void print(char[] s) 
{
        write(s);
}

Prints 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 #write(int) method.

 public  void print(String s) 
{
        if (s == null) {
            s = "null";
        }
        write(s);
}

Prints 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 #write(int) method.

 public  void print(Object obj) 
{
        write(String.valueOf(obj));
}

Prints an object. The string produced by the java.lang.String#valueOf(Object) method is translated into bytes according to the platform's default character encoding, and these bytes are written in exactly the manner of the #write(int) method.

 public PrintWriter printf(String format,
    Object args) 
{
        return format(format, args);
}

A convenience method to write a formatted string to this writer using the specified format string and arguments. If automatic flushing is enabled, calls to this method will flush the output buffer.

An invocation of this method of the form out.printf(format, args) behaves in exactly the same way as the invocation

    out.format(format, args) 

 public PrintWriter printf(Locale l,
    String format,
    Object args) 
{
        return format(l, format, args);
}

A convenience method to write a formatted string to this writer using the specified format string and arguments. If automatic flushing is enabled, calls to this method will flush the output buffer.

An invocation of this method of the form out.printf(l, format, args) behaves in exactly the same way as the invocation

    out.format(l, format, args) 

 public  void println() 
{
        newLine();
}

Terminates 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').

 public  void println(boolean x) 
{
        synchronized (lock) {
            print(x);
            println();
        }
}

Prints a boolean value and then terminates the line. This method behaves as though it invokes #print(boolean) and then #println() .

 public  void println(char x) 
{
        synchronized (lock) {
            print(x);
            println();
        }
}

Prints a character and then terminates the line. This method behaves as though it invokes #print(char) and then #println() .

 public  void println(int x) 
{
        synchronized (lock) {
            print(x);
            println();
        }
}

Prints an integer and then terminates the line. This method behaves as though it invokes #print(int) and then #println() .

 public  void println(long x) 
{
        synchronized (lock) {
            print(x);
            println();
        }
}

Prints a long integer and then terminates the line. This method behaves as though it invokes #print(long) and then #println() .

 public  void println(float x) 
{
        synchronized (lock) {
            print(x);
            println();
        }
}

Prints a floating-point number and then terminates the line. This method behaves as though it invokes #print(float) and then #println() .

 public  void println(double x) 
{
        synchronized (lock) {
            print(x);
            println();
        }
}

Prints a double-precision floating-point number and then terminates the line. This method behaves as though it invokes #print(double) and then #println() .

 public  void println(char[] x) 
{
        synchronized (lock) {
            print(x);
            println();
        }
}

Prints an array of characters and then terminates the line. This method behaves as though it invokes #print(char[]) and then #println() .

 public  void println(String x) 
{
        synchronized (lock) {
            print(x);
            println();
        }
}

Prints a String and then terminates the line. This method behaves as though it invokes #print(String) and then #println() .

 public  void println(Object x) 
{
        String s = String.valueOf(x);
        synchronized (lock) {
            print(s);
            println();
        }
}

Prints an Object and then terminates the line. This method calls at first String.valueOf(x) to get the printed object's string value, then behaves as though it invokes #print(String) and then #println() .

 protected  void setError() 
{
        trouble = true;
}

Indicates that an error has occurred.

This method will cause subsequent invocations of #checkError() to return true until #clearError() is invoked.

 public  void write(int c) 
{
        try {
            synchronized (lock) {
                ensureOpen();
                out.write(c);
            }
        }
        catch (InterruptedIOException x) {
            Thread.currentThread().interrupt();
        }
        catch (IOException x) {
            trouble = true;
        }
}

Writes a single character.

 public  void write(char[] buf) 
{
        write(buf, 0, buf.length);
}

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

 public  void write(String s) 
{
        write(s, 0, s.length());
}

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

 public  void write(char[] buf,
    int off,
    int len) 
{
        try {
            synchronized (lock) {
                ensureOpen();
                out.write(buf, off, len);
            }
        }
        catch (InterruptedIOException x) {
            Thread.currentThread().interrupt();
        }
        catch (IOException x) {
            trouble = true;
        }
}

Writes A Portion of an array of characters.

 public  void write(String s,
    int off,
    int len) 
{
        try {
            synchronized (lock) {
                ensureOpen();
                out.write(s, off, len);
            }
        }
        catch (InterruptedIOException x) {
            Thread.currentThread().interrupt();
        }
        catch (IOException x) {
            trouble = true;
        }
}

Writes a portion of a string.