Initial help New to Java - need help to get your first Java program running? See the Oracle Java Tutorials section on Getting Started. Background Java is a high-level, platform-independent, object-oriented programming language originally developed by Sun Microsystems and released in 1995. ...
-1
votes
0answers
33 views
Java breaking down [closed]
I need to break down this code into main meanings and basically just how it works. I do not do any Java programming. So I need alot of help. I do python mainly.
This is the code for explorer.class
...
1
vote
0answers
40 views
Android Asynctask… is this the correct way to do it?
I created a small android project with an AsyncTask. It simulates a time consuming task.
Please review my code and tell me what you would do on a different way and why.
Comments not specific to ...
4
votes
3answers
185 views
Is it better practice to have void method throw an exception or to have the method return a boolean?
This falls straight into the same category with the recent "Is it better practice to return if false or execute an if statement if true?" question.
Often, while writing code, I find myself presented ...
1
vote
2answers
63 views
Find two equal substrings in a string
I have various strings that contain codes, e.g. like this:
"file = new JarFile(new File()" + "\nSystem.out.println(file"
but also
"args"
Now I want to find the substring that is in the beginning ...
0
votes
1answer
19 views
Efficient implemetation of AlertDialog callback in Android
One day I realised that my Android project utilizes AlertDialogs here and there in very ineffective way. The heavily duplicated portion of code looked like this (actually, copied and pasted from some ...
0
votes
1answer
39 views
How is this for compressing (zipping) files?
I'm writing a Java Helper Library. I want to include a method to zip files together. This is what I've come up with. I'm using the java.util.zip.* library (ZipOutputStream and ZipEntry specifically). ...
0
votes
0answers
33 views
Converting infix expressions to postfix expressions
I thought that this code should solve the problem with inputs with parentheses like
1 * 2 + 3 * ( 5 + 2 ) - 3
and output the postfix expression without parentheses, but the output is
1.0 2.0 * 3.0 ...
4
votes
0answers
69 views
Is it wrong to use a boolean parameter to determine behavior? [migrated]
I have seen a practice from time to time that "feels" wrong, but I can't quite articulate what is wrong about it. Or maybe it's just my prejudice. Here goes:
A developer defines a method with a ...
3
votes
1answer
88 views
Java Code for permutations of a list of numbers
I asked this question on stackoverflow but someone directed me to this website. Please help.
I have written a program to find all the possible permutations of a given list of items. This precisely ...
2
votes
2answers
73 views
Is Factory Pattern implemented good in this way?
Suppose I have this code:
public interface BaseType {
public void doSomething();
}
public class ExtendedTypeA implements BaseType {
//No Instance Variables
@Override
public ...
1
vote
1answer
28 views
Optimal buffer size for HTTP PUT
I'm uploading videos to Vimeo using the VimeoAPI. I want to show a progress bar to the user. The only way to do this with the VimeoAPI is to call a method to the server which verifies the chunk you've ...
1
vote
0answers
25 views
ReentrantLock with priorities for waiting threads
I am trying to have a ReentrantLock with another way to determinate which thread will have the lock in the waiting queue. ReentrantLock implementation manages a Fair/Unfair policy, that's not what I ...
1
vote
1answer
98 views
Please review my Code Review crawler!
I am writing a program which automatically crawls codes from Code Review site!
I'm quite new to java. Would you please review my code?
The required .jars: jsoup, org.apache.commons.io.
Main.java
...
0
votes
1answer
33 views
Optimal method for writing bytes to file
I'm making a method to save a byte[] to a file. It's for a Java Helper I'm writing, so it needs to be able to handle any kind of system. I saw on this example the method of FileOutputStream called ...
0
votes
1answer
27 views
Optimal buffer size for output stream
I'm writing a method to save an input stream to an output stream. What's the optimal size for the buffer? Here's my method:
/**
* Saves the given InputStream to a file at the destination. Does not ...
