Category Archives: Java

Converting between binary and decimal representations of IEEE 754 floating-point numbers in C++, Java and Python

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This post implements a previous post that explains how to convert 32-bit floating point numbers to binary numbers in the IEEE 754 format. What we have is some C++ / Java / Python routines that will allows us to convert a floating point value into it’s equivalent binary counterpart, using the standard IEEE 754 representation consisting of the sign bit, exponent and mantissa (fractional part).
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Polymorphism in Java

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An example:

import java.util.*;

public class JavaPolymorph 
{
    public void Print()
    { System.out.println( "JavaPolymorph"); }  
    
   public static void main(String[] args)
   {
      JavaPolymorph j1 = new JavaPolymorph(); 
      JavaPolymorph j2 = new SubJavaPolymorph();
      
      j1.Print();
      j2.Print();       
   }
}

public class SubJavaPolymorph extends JavaPolymorph
{
    public void Print()
    { System.out.println( "SubJavaPolymorph"); }    
}

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Mathematical Expression Parsers in Java and C++

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Basic Expression Parsing

Click here for advanced expression parsing

When writing your own calculator it is necessary to build a converter that can transform an input mathematical expression such as ( 1 + 8 ) – ( ( 3 * 4 ) / 2 ), into a format that is more suited for evaluation by computers.
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Java Strings: The Basics

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One long section of code outlining how to achieve some basic string handling objectives in Java. Currently trying to get to grips with this language after spending far too many years concentrating on C++. Each technique is demonstrated with a code snippet. As with a lot of my other stuff, any new stuff I find useful will get added at a later date:
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