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<h3>Java PrintWriter</h3>
<p><strong>In this tutorial, we will learn about the Java PrintWriter, its constructors and its methods with the help of an example.</strong></p>
<p>The Java PrintWriter class prints formatted representations of objects to a text-output stream.</p>
<h4>Constructors of PrintWriter</h4>
<ul><li><strong>PrintWriter(File file) :</strong>This creates a new PrintWriter, without automatic line flushing, with the specified file.</li>
<li><strong>PrintWriter(File file, String csn) :</strong>This creates a new PrintWriter, without automatic line flushing, with the specified file and charset.</li>
<li><strong>PrintWriter(OutputStream out) :</strong>This creates a new PrintWriter, without automatic line flushing, from an existing OutputStream.</li>
<li><strong>PrintWriter(OutputStream out, boolean autoFlush) :</strong>This creates a new PrintWriter from an existing OutputStream.</li>
<li><strong>PrintWriter(String fileName) :</strong>This creates a new PrintWriter, without automatic line flushing, with the specified file name.</li>
<li><strong>PrintWriter(String fileName, String csn) :</strong>This creates a new PrintWriter, without automatic line flushing, with the specified file name and charset.</li>
<li><strong>PrintWriter(Writer out) :</strong>This creates a new PrintWriter, without automatic line flushing.</li>
<li><strong>PrintWriter(Writer out, boolean autoFlush) :</strong>This creates a new PrintWriter.</li></ul>
<h4>Methods</h4>
<table border=2><tr><th>Methods</th><th>Description</th></tr>
<tr><td>PrintWriter append(char c)</td><td>Appends the specified character to this writer.</td></tr>
<tr><td>PrintWriter append(CharSequence csq)</td><td>Appends the specified character sequence to this writer.</td></tr>
<tr><td>PrintWriter append(CharSequence csq, int start, int end)</td><td>Appends a subsequence of the specified character sequence to this writer.</td></tr>
<tr><td>boolean checkError()</td><td>Flushes the stream if it's not closed and checks its error state.</td></tr>
<tr><td>protected void clearError()</td><td>Clears the error state of this stream.</td></tr>
<tr><td>void close()</td><td>Closes the stream and releases any system resources associated with it.</td></tr>
<tr><td>void flush()</td><td>Flushes the stream.</td></tr>
<tr><td>PrintWriter format(Locale l, String format, Object... args)</td><td>Writes a formatted string to this writer using the specified format string and arguments.</td></tr>
<tr><td>PrintWriter format(String format, Object... args)</td><td>Writes a formatted string to this writer using the specified format string and arguments.</td></tr>
<tr><td>void print(boolean b)</td><td>Prints a boolean value.</td></tr>
<tr><td>void print(char c)</td><td>Prints a character.</td></tr>
<tr><td>void print(char[] s)</td><td>Prints an array of characters.</td></tr>
<tr><td>void print(double d)</td><td>Prints a double-precision floating-point number.</td></tr>
<tr><td>void print(float f)</td><td>Prints a floating-point number.</td></tr>
<tr><td>void print(int i)</td><td>Prints an integer.</td></tr>
<tr><td>void print(long l)</td><td>Prints a long integer.</td></tr>
<tr><td>void print(Object obj)</td><td>Prints an object.</td></tr>
<tr><td>void print(String s)</td><td>Prints a string.</td></tr>
<tr><td>PrintWriter printf(Locale l, String format, Object... args)</td><td>A convenience method to write a formatted string to this writer using the specified format string and arguments.</td></tr>
<tr><td>PrintWriter printf(String format, Object... args)</td><td>A convenience method to write a formatted string to this writer using the specified format string and arguments.</td></tr>
<tr><td>void println()</td><td>Terminates the current line by writing the line separator string.</td></tr>
<tr><td>void println(boolean x)</td><td>Prints a boolean value and then terminates the line.</td></tr>
<tr><td>void println(char x)</td><td>Prints a character and then terminates the line.</td></tr>
<tr><td>void println(char[] x)</td><td>Prints an array of characters and then terminates the line.</td></tr>
<tr><td>void println(double x)</td><td>Prints a double-precision floating-point number and then terminates the line.</td></tr>
<tr><td>void println(float x)</td><td>Prints a floating-point number and then terminates the line.</td></tr>
<tr><td>void println(int x)</td><td>Prints an integer and then terminates the line.</td></tr>
<tr><td>void println(long x)</td><td>Prints a long integer and then terminates the line.</td></tr>
<tr><td>void println(Object x)</td><td>Prints an Object and then terminates the line.</td></tr>
<tr><td>void println(String x)</td><td>Prints a String and then terminates the line.</td></tr>
<tr><td>protected void setError()</td><td>Indicates that an error has occurred.</td></tr>
<tr><td>void write(char[] buf)</td><td>Writes an array of characters.</td></tr>
<tr><td>void write(char[] buf, int off, int len)</td><td>Writes A Portion of an array of characters.</td></tr>
<tr><td>void write(int c)</td><td>Writes a single character.</td></tr>
<tr><td>void write(String s)</td><td>Writes a string.</td></tr>
<tr><td>void write(String s, int off, int len)</td><td>Writes a portion of a string.</td></tr></table>
<h4>Examples :</h4>
<pre><code>
import java.io.PrintWriter;
class Codemistic
{
public static void main(String[] args)
{
try
{
PrintWriter output = new PrintWriter("output.txt");
int age = 25;
output.printf("I am %d years old.", age);
output.close();
}
catch(Exception e)
{
e.getStackTrace();
}
}
}
<strong>Output :</strong>
A file named <var>output.txt<var> is created with the below content:
I am 25 years old.
</code></pre>
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