/************************************************************************* *  Compilation:  javac StdOut.java *  Execution:    java StdOut * *  Writes data of various types to standard output. * *************************************************************************/import java.io.OutputStreamWriter;import java.io.PrintWriter;import java.io.UnsupportedEncodingException;import java.util.Locale;/** *  <i>Standard output</i>. This class provides methods for writing strings *  and numbers to standard output. *  <p> *  For additional documentation, see <a href="http://www.mamicode.com/http://introcs.cs.princeton.edu/15inout">Section 1.5</a> of *  <i>Introduction to Programming in Java: An Interdisciplinary Approach</i> by Robert Sedgewick and Kevin Wayne. * *  @author Robert Sedgewick *  @author Kevin Wayne */public final class StdOut {    // force Unicode UTF-8 encoding; otherwise it‘s system dependent    private static final String CHARSET_NAME = "UTF-8";    // assume language = English, country = US for consistency with StdIn    private static final Locale LOCALE = Locale.US;    // send output here    private static PrintWriter out;    // this is called before invoking any methods    static {        try {            out = new PrintWriter(new OutputStreamWriter(System.out, CHARSET_NAME), true);        }        catch (UnsupportedEncodingException e) { System.out.println(e); }    }    // don‘t instantiate    private StdOut() { }    // close the output stream (not required)   /**     * Close standard output.     */    public static void close() {        out.close();    }   /**     * Terminate the current line by printing the line separator string.     */    public static void println() {        out.println();    }   /**     * Print an object to standard output and then terminate the line.     */    public static void println(Object x) {        out.println(x);    }   /**     * Print a boolean to standard output and then terminate the line.     */    public static void println(boolean x) {        out.println(x);    }   /**     * Print a char to standard output and then terminate the line.     */    public static void println(char x) {        out.println(x);    }   /**     * Print a double to standard output and then terminate the line.     */    public static void println(double x) {        out.println(x);    }   /**     * Print a float to standard output and then terminate the line.     */    public static void println(float x) {        out.println(x);    }   /**     * Print an int to standard output and then terminate the line.     */    public static void println(int x) {        out.println(x);    }   /**     * Print a long to standard output and then terminate the line.     */    public static void println(long x) {        out.println(x);    }   /**     * Print a short to standard output and then terminate the line.     */    public static void println(short x) {        out.println(x);    }   /**     * Print a byte to standard output and then terminate the line.     */    public static void println(byte x) {        out.println(x);    }   /**     * Flush standard output.     */    public static void print() {        out.flush();    }   /**     * Print an Object to standard output and flush standard output.     */    public static void print(Object x) {        out.print(x);        out.flush();    }   /**     * Print a boolean to standard output and flush standard output.     */    public static void print(boolean x) {        out.print(x);        out.flush();    }   /**     * Print a char to standard output and flush standard output.     */    public static void print(char x) {        out.print(x);        out.flush();    }   /**     * Print a double to standard output and flush standard output.     */    public static void print(double x) {        out.print(x);        out.flush();    }   /**     * Print a float to standard output and flush standard output.     */    public static void print(float x) {        out.print(x);        out.flush();    }   /**     * Print an int to standard output and flush standard output.     */    public static void print(int x) {        out.print(x);        out.flush();    }   /**     * Print a long to standard output and flush standard output.     */    public static void print(long x) {        out.print(x);        out.flush();    }   /**     * Print a short to standard output and flush standard output.     */    public static void print(short x) {        out.print(x);        out.flush();    }   /**     * Print a byte to standard output and flush standard output.     */    public static void print(byte x) {        out.print(x);        out.flush();    }   /**     * Print a formatted string to standard output using the specified     * format string and arguments, and flush standard output.     */    public static void printf(String format, Object... args) {        out.printf(LOCALE, format, args);        out.flush();    }   /**     * Print a formatted string to standard output using the specified     * locale, format string, and arguments, and flush standard output.     */    public static void printf(Locale locale, String format, Object... args) {        out.printf(locale, format, args);        out.flush();    }    // This method is just here to test the class    public static void main(String[] args) {        // write to stdout        StdOut.println("Test");        StdOut.println(17);        StdOut.println(true);        StdOut.printf("%.6f\n", 1.0/7.0);    }}