letest.java

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/**
 * LETest.java
 * copyright (c) 1998-2008 Roedy Green, Canadian Mind Products
 * http://mindprod.com
 * Version History
 * 1.0 1998-01-6
 * 1.1 1998-01-07- officially implements DataInput
 * 1.2 1998-01-09- add LERandomAccessFile
 * 1.3 1998-08-27
 * 1.4 1998-11-10 - add new address and phone.
 * 1.5 1999-10-08- use com.mindprod.ledatastream package name.
 * 1.8 2007-05-24 - add pad, icon, pass Intellij inspector.
 *
 *
 * Tests Little Endian LEDataInputStream and LEDataOutputStream and demonstrates
 * the use of its methods. Output should look like this: 44 -1 a -249
 * -123456789012 -649 -749 true 3.14 4.14 echidna kangaroo u dingo Then
 * repeated.
 */
package com.mindprod.ledatastream;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

/**
 * Read and Write little-endian binary data.
 *
 * @author Roedy Green, Canadian Mind Products
 * @version 1.8 2007-05-24
 */
public final class LETest
    {
    // --------------------------- main() method ---------------------------

    /**
     * Debug harness.
     *
     * @param args not used
     */
    public static void main( String[] args )
        {
        // Write little-endian binary data into a sequential file

        // O P E N
        FileOutputStream fos;
        try
            {
            fos = new FileOutputStream( "C:/temp/temp.dat", false
                    /* append */ );
            }
        catch ( IOException e )
            {
            System.out
                    .println(
                            "Unexpected IOException opening LEDataOutputStream" );
            return;
            }

        LEDataOutputStream ledos = new LEDataOutputStream( fos );

        // W R I T E
        try
            {
            ledos.writeByte( ( byte ) 44 );
            ledos.writeByte( ( byte ) 0xff );
            ledos.writeChar( 'a' );
            ledos.writeInt( -249 );
            ledos.writeLong( -123456789012L );
            ledos.writeShort( ( short ) -649 );
            ledos.writeShort( ( short ) -749 );
            ledos.writeBoolean( true );
            ledos.writeDouble( 3.14D );
            ledos.writeFloat( 4.14F );
            ledos.writeUTF( "echidna" );
            ledos.writeBytes( "kangaroo"/* string -> LSB 8-bit */ );
            ledos.writeChars( "dingo"/* string 16-bit Unicode */ );
            }
        catch ( IOException e )
            {
            System.out
                    .println(
                            "Unexpected IOException writing LEDataOutputStream" );
            return;
            }

        // C L O S E
        try
            {
            ledos.close();
            }
        catch ( IOException e )
            {
            System.out
                    .println(
                            "Unexpected IOException closing LEDataOutputStream" );
            return;
            }

        // Read little-endian binary data from a sequential file
        // import java.io.*;

        // O P E N
        FileInputStream fis;
        try
            {
            fis = new FileInputStream( "C:/temp/temp.dat" );
            }
        catch ( FileNotFoundException e )
            {
            System.out
                    .println( "Unexpected IOException opening LEDataInputStream" );
            return;
            }
        LEDataInputStream ledis = new LEDataInputStream( fis );

        // R E A D
        try
            {
            byte b = ledis.readByte();
            System.out.println( b );
            byte ub = ( byte ) ledis.readUnsignedByte();
            System.out.println( ub );
            char c = ledis.readChar();
            System.out.println( c );
            int j = ledis.readInt();
            System.out.println( j );
            long l = ledis.readLong();
            System.out.println( l );
            short ii = ledis.readShort();
            System.out.println( ii );
            short us = ( short ) ledis.readUnsignedShort();
            System.out.println( us );
            boolean q = ledis.readBoolean();
            System.out.println( q );
            double d = ledis.readDouble();
            System.out.println( d );
            float f = ledis.readFloat();
            System.out.println( f );
            String u = ledis.readUTF();
            System.out.println( u );
            byte[] ba = new byte[8];
            ledis.readFully( ba, 0/* offset in ba */, ba.length/*
                                                                     * bytes to
                                                                     * read
                                                                     */ );
            System.out.println( new String( ba ) );
            /* there is no readChars method */
            c = ledis.readChar();
            System.out.print( c );
            c = ledis.readChar();
            System.out.print( c );
            c = ledis.readChar();
            System.out.print( c );
            c = ledis.readChar();
            System.out.print( c );
            c = ledis.readChar();
            System.out.println( c );
            }
        catch ( IOException e )
            {
            System.out
                    .println( "Unexpected IOException reading LEDataInputStream" );
            return;
            }

        // C L O S E
        try
            {
            ledis.close();
            }
        catch ( IOException e )
            {
            System.out
                    .println( "Unexpected IOException closing LEDataInputStream" );
            return;
            }
        // Write little endian data to a random access files

        // O P E N
        LERandomAccessFile leraf;
        try
            {
            leraf = new LERandomAccessFile( "C:/temp/rand.dat", "rw"
                    /* read/write */ );
            }
        catch ( IOException e )
            {
            System.out
                    .println(
                            "Unexpected IOException creating LERandomAccessFile" );

            return;
            }

        try
            {
            // W R I T E
            leraf.seek( 0/* byte offset in file */ );
            leraf.writeByte( ( byte ) 44 );
            leraf.writeByte( ( byte ) 0xff );
            leraf.writeChar( 'a' );
            leraf.writeInt( -249 );
            leraf.writeLong( -123456789012L );
            leraf.writeShort( ( short ) -649 );
            leraf.writeShort( ( short ) -749 );
            leraf.writeBoolean( true );
            leraf.writeDouble( 3.14D );
            leraf.writeFloat( 4.14F );
            leraf.writeUTF( "echidna" );
            leraf.writeBytes( "kangaroo"/* string -> LSB 8-bit */ );
            leraf.writeChars( "dingo"/* string 16-bit Unicode */ );
            leraf.seek( 0/* byte offset in file */ );
            }
        catch ( IOException e )
            {
            System.out
                    .println(
                            "Unexpected IOException writing LERandomAccessFile" );
            return;
            }

        try
            {
            // R E A D
            byte b = leraf.readByte();
            System.out.println( b );
            byte ub = ( byte ) leraf.readUnsignedByte();
            System.out.println( ub );
            char c = leraf.readChar();
            System.out.println( c );
            int j = leraf.readInt();
            System.out.println( j );
            long l = leraf.readLong();
            System.out.println( l );
            short ss = leraf.readShort();
            System.out.println( ss );
            short us = ( short ) leraf.readUnsignedShort();
            System.out.println( us );
            boolean q = leraf.readBoolean();
            System.out.println( q );
            double d = leraf.readDouble();
            System.out.println( d );
            float f = leraf.readFloat();
            System.out.println( f );
            String u = leraf.readUTF();
            System.out.println( u );
            byte[] ba = new byte[8];
            leraf.readFully( ba, 0/* offset in ba */, ba.length/*
                                                                     * bytes to
                                                                     * read
                                                                     */ );
            System.out.println( new String( ba ) );
            /* there is no readChars method */
            c = leraf.readChar();
            System.out.print( c );
            c = leraf.readChar();
            System.out.print( c );
            c = leraf.readChar();
            System.out.print( c );
            c = leraf.readChar();
            System.out.print( c );
            c = leraf.readChar();
            System.out.println( c );
            }
        catch ( IOException e )
            {
            System.out
                    .println(
                            "Unexpected IOException reading LERandomAccessFile" );
            return;
            }

        // C L O S E
        try
            {
            leraf.close();
            }
        catch ( IOException e )
            {
            System.out
                    .println(
                            "Unexpected IOException closing LERandomAccessFile" );
            }
        }// end main
    }