CMP Conversion Amanuensis  CMP Conversion Amanuensis

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This Applet will help you write Java code. Instead of memorising the 361 conversion functions between the 19 basic types, just use this amanuensis to generate the code, the paste it into your source. The Converter Amanuensis is also available with Java source to download.
Sorry, you need Java 1.5+ to run this Applet.
If the Applet does not work for you, try the 19 × 19 matrix crib sheet:
conversion table for Java 1.4-
conversion table for Java 1.5+
conversion: which includes notes on converting byte and char arrays
other downloads
precis of the current version.
download source and executable to run this Applet on your own machine as a stand-alone application.

If, converter, the above Converter Java Applet (that can also be run as an application) does not work…

  1. This Java Applet (that can also be run as an application) needs Java 1.5 or later, best version 1.5.0_19 or later, version 1.6.0_14 recommended and a recent browser.
  2. You should see the Applet hybrid above looking much like the screenshot. If you don’t, the following should help you get it working:
  3. If you are using Microsoft Internet Explorer, try another browser. Seriously. Microsoft has taken great pains, over and over, to screw up Java and every other multi-platform standardisation.
  4. If you are using Internet Explorer 7 or 8, you must allow blocked content permission for Active X to run. This also gives permission to Java to run. Click the Information bar, and then click Allow blocked content. Unfortunately, this also allows dangerous ActiveX code to run. However, you must do this in order to get access to perfectly-safe Java Applets running in a sandbox. This is part of Microsoft’s war on Java. Don’t put up with it! Use a different browser.
  5. Especially if this Applet hybrid has worked before, try clearing the browser cache and rebooting.
  6. To ensure your Java is up to date, check with Wassup. First, download it and run it as an application independent of your browser, then run it online as an Applet to add the complication of your browser.
  7. If the above Applet hybrid does not work, check the Java console for error messages.
  8. If the above Applet hybrid does not work, you might have better luck with the downloadable version.
  9. If you are using Mac OS X and would like an improved Look and Feel, download the QuaQua look & feel from randelshofer.ch/quaqua. UnZip the contained quaqua.jar and install it in ~/Library/Java/Extensions or one of the other ext dirs.
  10. If you still can’t get the program working click HELP for more detail.
  11. If you can’t get the above Applet hybrid working after trying the advice above and from the HELP button below, have bugs to report or ideas to improve the program or its documentation, please send me an email atemail Roedy Green.
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Primitives

Primitive variables include boolean, char, byte, short, int, long, float and double. Strings, arrays and Objects are not considered primitives.
Java Primitives
Type Signed? Bits Bytes Digits Lowest Highest Mnemonic
boolean n/a 1 1 1 false true zero/one
char unsigned Unicode 16 2 4:5 '\u0000' [0] aka Character.MIN_VALUE '\uffff' [216-1] aka Character. MAX_VALUE Unicode chars are twice as big as C’s.
byte signed 8 1 2:3 -128 [-27] aka Byte. MIN_VALUE +127 [27-1]aka Byte. MAX_VALUE Bytes are signed, so half the usual 255 range.
short signed 16 2 4:5 -32,768 [-215] aka Short. MIN_VALUE +32,767 [215-1] aka Short. MAX_VALUE 32K
int signed 32 4 9:10 -2,147,483,648 [-231] aka Integer. MIN_VALUE +2,147,483,647 [231-1] aka Integer. MAX_VALUE 2 gig
long signed 64 : [-263] aka Long. MIN_VALUE [263-1] aka Long. MAX_VALUE exabytes, or billion gig
float signed exponent and mantissa : ±1.40129846432481707e-45 aka Float.MIN_VALUE ±3.40282346638528860e+38 aka Float.MAX_VALUE
or roughly ±2127
with to significant digits of accuracy.
A float can exactly represent integers
in the range -224 to +224.		 rough, compact float
double signed exponent and mantissa : ±4.94065645841246544e-324 aka Double.MIN_VALUE ±1.79769313486231570e+308 aka Double.MAX_VALUE
or roughly ±21023
with to significant digits of accuracy.
A double can exactly represent integers
in the range -253 to +253.		 high precision float

Primitives vs Immutable Wrapper Objects

Contrast that table of primitives, with this table of basic Java types:
Mutable Primitives Immutable Objects
boolean Boolean
ordinary signed byte Byte
unsigned byte Byte
short Short
char Character
int Integer
long Long
float Float
double Double
char[] String

PackageVersionReleasedLicenceLanguageNotes 
converter
Converter		 5.3 2009-03-30 free Java
summary ❘ facts ❘ screenshot ❘ browse source repository for the current version of Converter. Show you how to write Java conversion code, e.g. String to double.
download Converter Java source and compiled class files to run on your own machine as an application or Applet.

First install the most recent Java.

To install, extract the zip download with WinZip, (or similar unzip utility) into any directory you please, often J:\ — ticking off the “user folder names” option.

To check out the corresponding source from the Subversion repository, use the TortoiseSVN repo-browser to
access converter source in repository with [Tortoise] Subversion client on wush.net/svn/mindprod/com/mindprod/converter/.

After you have installed the jar, you can run it as an application. Type:

java -jar J:\com\mindprod\converter\converter.jar

adjusting as necessary to account for where the jar file is.

download ASP PAD XML program description for the current version of Converter.

Converter is free. Full source included. You may even include the source code, modified or unmodified in commercial programs that you write and distribute. Non-military use only.
    
 
Comparable/Comparator Cutter Amanuensis
conversion table for Java 1.4-
conversion table for Java 1.5+
conversion: which includes byte and char arrays
DecimalFormat
File I/O Amanuensis
hex
other downloads
Quoter Amanuensis
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