Yahoo Web Search

Search results

1. Top results related to how is java different from other programming languages in python

   • How is a union different from a struct? Do other languages have similar constructs?

     Top Answer

     Answered Nov 16, 2009 · 10 votes

     So in your example, when I allocate time:

     int main(){ time t;}-

     The compiler can interpret the memory at &t as if it is either a long:

     t.simpleDate;-

     or as if its a double:

     t.perciseDate;-

     So if the raw hex of the memory at t looks like

     0x12345678;-

     That value can be "parsed" as either a double or long, depending on how its accessed. So for it to be useful you have to know how a long and a double are going to be packed & formatted exactly in memory. For example, a long is going to be a 2-s complement signed integer, which you can read about here. you can learn how a double is formatted in binary here.

     A struct, however, just groups separate variables, with distinct address spacing into one block of memory.

     (Note your example might be dangerous as sizeof(long) could be 32 bits whereas sizeof(double) is always 64 bits)

     Unions are commonly used when you want a "raw" representation (like a char array) and a "message" representation. For example a message that is to be sent over a socket:

     struct Msg{ int msgType; double Val1; double Val2;}; // assuming packing on 32-bit boundaryunion{ Msg msg; unsigned char msgAsBinary[20];};

     Hope that helps.

     Other Answers

     Answered Nov 16, 2009 · 14 votes

     A union behaves as if all its members are in the same location in memory, overlapping.

     This is useful when you want to represent some kind of "generic" value, or a value that can be of any of a set of types. Because the fields overlap, you can only legally access a field if you know it's been previously initialized. Still, since C doesn't check this, and many compilers emit code that allow it, it is a common trick to do ... interesting type conversions, such as:

     union { int integer; float real;} convert;-convert.real = 3.14;printf("The float %f interpreted as an integer is %08x", convert.real, convert.integer);

     For the more well-formed usage, where you keep track of what was last stored in the union, it could look for instance like this:

     typedef enum { INTEGER = 0, REAL, BOOLEAN, STRING } ValueType;-typedef struct { ValueType type; union { int integer; float real; char boolean; char *string; } x;} Value;

     Here, note that the union is actually a field in the surrounding structure, Value. Access could look like this:

     void value_set_integer(Value *value, int x){ value->type = INTEGER; value->x.integer = x;}

     This records that the current contents of the union is an integer, and stores the given value. A function to e.g. print a Value can inspect the type member, and do the right thing:

     void value_print(const Value *value){ switch(value->type) { case INTEGER: printf("%d\n", value->x.integer); break; case REAL: printf("%g\n", value->x.real); break; /* ... and so on ... */ }}

     There is no equivalent in Java. C++, being sort of almost a super-set of C, has the same functionality. It even "one-ups" C's implementation, and allows anonymous unions. In C++, the above could have written without naming the inner union (x), which would make the code quite a lot shorter.

     Other Answers

     Answered Nov 16, 2009 · 2 votes

     A union lets you interpret one memory location (raw, binary value) in several different ways.

     An example I've actually used, is accessing the individual bytes of a uint32.

     union { uint32 int; char bytes[4];} uint_bytes;-

     What a union offers, is multiple ways of accessing (parts of) the same memory.

     The size of a union type is equal to the size of the largest type in the union.

     Check all answers on Stack Overflow

     1/5

   • How are python lists different from Java arrays

     Top Answer

     Answered Jun 28, 2021 · 2 votes

     Although people compare Python lists to arrays in Java, actually lists are more like ArrayLists in Java (Or Vectors in C++). Lists in Python store pointers to objects rather than objects themselves, which is why they can store heterogenous types ([1,2,3,'x',"hello"]). So, technically the list still stores elements of specific size and type (pointers), but those pointers can point to objects of any type, size and value.

     These variable length lists in Python keep a pointer to themselves and the their length in a list head structure, which work with exponential over-allocation, so that the code can have linear time complexity for append/remove operations.

     Over-allocating the memory is used to avoid having to resize the list too many times (Say, after every append operation). The growth pattern of the list is something like: 0, 4, 8, 16, 25, 35, 46, 58, 72, 88, …

     Similarly for remove/pop operations, if the new size is less than half the allocated size then the list is shrunk. Although additional cost of Slicing the list is added in case of removing the element from non-terminal positions.

     Check all answers on Stack Overflow

     2/5

   • Python web frameworks vs Java web frameworks (how is web development in Python done?)

     Top Answer

     Answered Feb 05, 2011 · 2 votes

     Python web frameworks run the full gamut of capabilities/facilities, all the way from shims around WSGI such as Bottle and Flask, all the way to full frameworks such as Django and TurboGears, and even "megaframeworks" such as Zope. Each does things slightly differently, but there will be some familiarity from one to the next.

     Check all answers on Stack Overflow

     3/5

   • Is there a way to enable inlay hints in VSCode for other languages like Java?

     Top Answer

     Answered Oct 22, 2021 · 0 votes

     This feature is in the plan, see support inlay hints.

     You may upvote it and waiting for the feature released.

     Check all answers on Stack Overflow

     4/5

   • How to check the current platform and if java is installed in python?

     Top Answer

     Answered May 23, 2017 · 1 votes

     • is a duplicate of How to determine whether java is installed on a system through python? for which I agree with the second answer, in particular, that you shouldn't check most likely. You should document your dependency on it, and have your package manager on whatever systems have one install it, and on Windows have your user install it themselves.
     • The platform module.

     Check all answers on Stack Overflow

     5/5

   Show moreShow less

2. Videos

   • 

     7:45

     youtube.com

     Java vs Python Comparision | Which is Better For Future Java or Python | Java & Python | Simplilearn

     Sep 11, 2020

     60.6K Views

   • 

     blog.udemy.com

     Java vs. Python: Which Is the Best Programming Language for You? - Udemy Blog

     Feb 11, 2015

     99.7K Views

   • 

     7:30

     youtube.com

     Java vs Python Comparison | Which One You Should Learn? | Edureka

     Sep 14, 2018

     1.3M Views

   View all

3. www.getwidget.dev › blog › python-vs-javaPython vs Java: An In-Depth Language Comparison [ 2024 Updated]

   www.getwidget.dev › blog › python-vs-java

   • Cached

   Mar 27, 2024 · Python and Java are both popular programming languages used in a wide range of applications. Understanding the differences between these two languages is important for developers, businesses, and anyone looking to enter the field of programming.

4. www.coursera.org › articles › python-vs-javaPython vs. Java: Which Should I Learn? | Coursera

   www.coursera.org › articles › python-vs-java

   • Cached

   • Java: The Faster Path
   • Python: The Simple Path
   • How to Start Learning
   • Start Learning Python Or Java Today with Coursera

   When it comes to sheer speed, Java is a clear winner. According to Stack Overflow, this general-use, compiled language is the sixth most commonly used programming language . It's also the most popular programming language among developers, according to HackerRank . Several factors are driving Java's continued popularity, primarily its platform inde...

   See full list on coursera.org

   Although Java is faster, Python is more versatile, easier to read, and has a simpler syntax. According to Statista, this general use, interpreted language is the third most popular coding language among developers worldwide . Python's popularity has experienced explosive growth in the past few years, likely due to its ease-of-use for IoT devices, d...

   See full list on coursera.org

   Learn just one, or learn them both. Many programmers eventually learn multiple programming languages. To get started, you’ll be better off if you choose one—but which is better as a start? That depends upon what you find most interesting and which language feels like a good match for your goals. If you're just beginning to learn how to code, you mi...

   See full list on coursera.org

   Another option is to take online courses to become more familiar with Java or Python before committing to a more rigorous form of training. You can learn Python fundamentals from an industry leader in technology with Google's Crash Course on Python. This beginner-friendly course can be completed in just 26 hours and covers essential Python concepts...

   See full list on coursera.org

5. www.geeksforgeeks.org › difference-between-pythonDifference between Python and Java - GeeksforGeeks

   www.geeksforgeeks.org › difference-between-python

   • Cached

   Mar 11, 2023 · A major difference between Java and Python is that Java is compiled and statically typed, while Python is interpreted and dynamically typed. As a result, learning Java is more challenging than learning Python. Python is a high-level, interpreted programming language. It was invented back in 1991, by Guido Van Rossum.

6. www.developer.com › java › python-vs-javaPython vs Java: Compare Programming Languages (2022)

   www.developer.com › java › python-vs-java

   • Cached

   Aug 13, 2021 · Below you can find a brief list of the difference between the Java and Python programming languages. Java and Python Syntax Differences. Java is a strictly typed language, following strict rules when it comes to how a developer codes. More accurately, Java is statically typed, meaning programmers have to explicitly declare variable types.

7. realpython.com › java-vs-pythonJava vs Python: Basic Python for Java Developers

   realpython.com › java-vs-python

   • Cached

   How Is Python Different From Java? Indentation for Code Block Grouping. A Read-Eval-Print Loop From the Beginning. Dynamically Typed and Strongly Typed. CPython vs the JIT Compiler. Built-in Function and Operator Overloading. Nice Syntax for Functional Processing of Collections. Everything Is an Object. What Aspects of Java and Python Are Similar?

8. www.imaginarycloud.com › blog › python-vs-javaPython vs Java: key differences and code examples

   www.imaginarycloud.com › blog › python-vs-java

   • Cached

   Sep 14, 2023 · Last Updated: September 14, 2023 11 min read. Python vs Java: both are excellent and very popular programming languages. Despite their differences, they both stand out for their powerful cross-platform support as well as for their extensive libraries. However, they do excel in different applications.

9. www.codecademy.com › resources › blogPython vs. Java: Which One Is Right For You? - Codecademy

   www.codecademy.com › resources › blog

   • Cached

   Jun 9, 2021 · But, Java’s syntax is similar to that of many other programming languages — like C++, PHP, and JavaScript — so learning it will give you a headstart when you venture into other languages. Python’s syntax is unique, and while many of its programming concepts will translate to other languages, its syntax will not. Python vs. Java: Use cases.