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  • 算法java(Robert Sedgewick)基本API-StdOut.java

    /*************************************************************************
     *  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://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
    ", 1.0/7.0);
        }
    
    }
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  • 原文地址:https://www.cnblogs.com/pacoson/p/4003476.html
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