Tagged Questions

Java is an object-oriented language and runtime environment (JRE). Java programs are platform independent, because they are compiled to bytecode and their execution is handled by a Virtual Machine called the Java VM or JVM.

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Mirror function for Binary tree in Java

QUESTION : Design a mirror method that computes the mirror image of a binary tree. What is wrong with my code?? This makes sense to me, however the only example that passes is my Leaf only example: ...
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Getting error while injecting the spring dependency

I am getting error while injecting the spring dependency , please advise how to overcome from this and please also advise the cause for this exception to come Error setting property values; nested ...
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netty fireWriteComplete actually nothing written to remote

netty 3.x, nio model: the netty IO writing thread will invoke WritableByteChannel.write(ByteBuffer) finally,netty will consider it written successfuly,but actually the bytes are written to a socket ...
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Add content of separeted Lists to JTable

How do i populate a JTable with content from 2 different lists? i have 2 lists with Objects i get from 2 different tables in a database, Then i want to put all of them into a single row in a JTable So ...
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What content-type does dropbox (file put) api uses? and How to mimic it?

I was reading the files_put documentation for the Dropbox API. The URL Path they use is: https://api-content.dropbox.com/1/files_put/<root>/<path>?param=val and request body holds the ...
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How do I create form controls (radio, checkbox, buttons, etc.) in Excel using Apache POI (Java)?

Is it possible for me to produce form controls for Excel with Apache POI library using Java? If this is not possible, what are the alternative? I really need this to accomplish my works. Thank in ...
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Merging several ByteArrayOutputStreams into one FileOutputStream

I am splitting up a computation among eight threads and writing the results to a file, as follows: 1a. Each of seven threads processes its input and writes its output to its own ...
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2answers
32 views

String.split won't let me split with periods

I am trying to do a String.split on a website address using the "." so that I can find the domain name of the website. However, when I do this: String href = "www.google.com"; String split[] = ...
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How to identify variable names in an instruction?

I am looking for a solution which will provide me the names of every variable through which the value of password variable passes away. That is, {pass, temp, temp1, var1} class Student{ public ...
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XML + CSS to PDF (flying-saucer library currently, open to other ideas)

Okay, so I'm trying to convert an XML file into a PDF using CSS for formatting/layout. XML file: <?xml version="1.0"?><?xml-stylesheet href='file:C:/feedback-export/pdf/pdfstyle.css' ...
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Design and development of a meeting scheduler in java

Hey I guys I a complete newbie in JAVA. I was ask to design a meeting scheduler with 10people and the choice of time is 9am to 4pm. Each person can choose two time to have the meeting for an hour. I ...
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28 views

How to stop matcher on the first occurrence of a char?

I would like to using Matcher in this string: #Function()(a) To select just: #Function() I'm using this regular expression: Pattern pat = Pattern.compile("\\#.*\\)"); Matcher match = ...
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How to use a variable from a method(inside Try-Catch) in another class? Java GUIs

So I'm trying to create a basic RPG userID selection menu using JFrames; I opted to display the ID options using radio buttons. Once the user selects and ID I burp it back using a JOptionPane. All ...
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2answers
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Serialization and objects stored as instance variables

I'm a little confused about serialization. I have a class, lets call it Container. Variables of the Container class contain ArrayLists of other classes - A,B,C,etc... If I were to serialize and ...
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4answers
35 views

Parameter passing and method calling

I have a question about parameter passing. In this example methodTwo wants to call methodOne but only use the x, and y values and not the Color color. When I try to do this i get a error in Eclipse ...

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