I am making a text editor using Java swing. I am using JTextArea for the same. I want to know how I can use Undo and Redo functionality in JTextArea as I am not able to use it.
I have a set of data in one JSON structure:
[[task1, 10, 99],
[task2, 10, 99],
[task3, 10, 99],
[task1, 11, 99],
[task2, 11, 99],
[task3, 11, 99]]
and need to convert it to another JSON structure:
[{
label: "task1",
data: [[10, 99], [11, 99]]
},
{
label: "task2",
data: [[10, 99], [11, 99]]
},
{
label: "task3",
data: [[10, 99], [11, 99]]
}]
What's the best way to do this with javascript/java?
I am new to java. I was wondering if there is a tool to copy fields and method easily.
E.g if I have
private String foo; // with getter/setters
I should be able to select foo and type bar car in a textbox and the tool should generate fields bar and car with their getter/setters.
I just got this Chumby thing for Christmas. I was thinking of writing a StackOverflow widget for it. Does anyone know any caveats to programming this, or especially good things for chumby virgins to know? I have not yet begun to do my research. I guess it's just a Linux device which runs java widgets.
Hi,
This is simple question only...
i did a program in java that accepts input via command line arguments.
I get input of two numbers and operator in command line.
multiplying two numbers, i have to give input as 5 3 *.
But if i give like this, i cant get answer.
Y its not accept * in cmd....
waiting for reply guys...
An Android Java project placed in a git repository and built in an Android tree in /packages/apps needs to have the project files located at the root of the git repository.
This is problematic for creating a complementary Test project, which should ideally be included in the same git repository so commits are atomic for both code and tests. Eclipse gets very unhappy if you include the Test project as a subdirectory.
Is there an appropriate approach for dealing with this other than creating a second repository?
Hi all,
I have been using JBoss Seam now for over a year and still haven't seen much acceptance here in the US. My metrics are, the number of jobs that indicate JBoss Seam and number of people talking about JBoss Seam (Java groups / JBoss Seam groups, etc.).
Is JBoss Seam more popular outside the US?
Walter
Recently I started to use Eclipse's java compiler, because it is significantly faster than standard javac. I was told that it's faster because it performs incremental compiling. But I'm still a bit unsure about this since I can't find any authoritative documentation about both - eclispse's and sun's - compilers "incremental feature". Is it true that Sun's compiler always compiles every source file and Eclipse's compiler compile only changed files and those that are affected by such a change?
I am looking for code that will add favorites / MRU type behavior to a JComboBox.
I could code this myself, but it sure seems like someone else has probably already done it.
I found the following (which looks exactly like what I want, but the source code is nowhere near complete): http://java.sys-con.com/node/36658
Any suggestions? I need to keep this relatively light, so I'd prefer to not use a component that's part of a monolithic widget library, and open source is preferred.
I have a class Client.java in two different jars jar1 & jar2
Now at run time i want to decide which Client.class loaded like
if (country==india){
// load Client class of jar1
) else{
load client class from jar2
}
can i do that...
I have written a program that creates nodes that in this class are parts of polynomials and then the two polynomials get added together to become one polynomial (list of nodes). All my code compiles so the only problem I am having is that the nodes are not inserting into the polynomial via the insert method I have in polynomial.java and when running the program it does create nodes and displays them in the 2x^2 format but when it comes to add the polynomials together it displays o as the polynomials, so if anyone can figure out whats wrong and what I can do to fix it it would be much appreciated.
Here is the code:
import java.util.Scanner;
class Polynomial{
public termNode head;
public Polynomial()
{
head = null;
}
public boolean isEmpty()
{
return (head == null);
}
public void display()
{
if (head == null)
System.out.print("0");
else
for(termNode cur = head; cur != null; cur = cur.getNext())
{
System.out.println(cur);
}
}
public void insert(termNode newNode)
{
termNode prev = null;
termNode cur = head;
while (cur!=null && (newNode.compareTo(cur)<0))
{
prev = null;
cur = cur.getNext();
}
if (prev == null)
{
newNode.setNext(head);
head = newNode;
}
else
{
newNode.setNext(cur);
prev.setNext(newNode);
}
}
public void readPolynomial(Scanner kb)
{
boolean done = false;
double coefficient;
int exponent;
termNode term;
head = null; //UNLINK ANY PREVIOUS POLYNOMIAL
System.out.println("Enter 0 and 0 to end.");
System.out.print("coefficient: ");
coefficient = kb.nextDouble();
System.out.println(coefficient);
System.out.print("exponent: ");
exponent = kb.nextInt();
System.out.println(exponent);
done = (coefficient == 0 && exponent == 0);
while(!done)
{
Polynomial poly = new Polynomial();
term = new termNode(coefficient,exponent);
System.out.println(term);
poly.insert(term);
System.out.println("Enter 0 and 0 to end.");
System.out.print("coefficient: ");
coefficient = kb.nextDouble();
System.out.println(coefficient);
System.out.print("exponent: ");
exponent = kb.nextInt();
System.out.println(exponent);
done = (coefficient==0 && exponent==0);
}
}
public static Polynomial add(Polynomial p, Polynomial q)
{
Polynomial r = new Polynomial();
double coefficient;
int exponent;
termNode first = p.head;
termNode second = q.head;
termNode sum = r.head;
termNode term;
while (first != null && second != null)
{
if (first.getExp() == second.getExp())
{
if (first.getCoeff() != 0 && second.getCoeff() != 0);
{
double addCoeff = first.getCoeff() + second.getCoeff();
term = new termNode(addCoeff,first.getExp());
sum.setNext(term);
first.getNext();
second.getNext();
}
}
else if (first.getExp() < second.getExp())
{
sum.setNext(second);
term = new termNode(second.getCoeff(),second.getExp());
sum.setNext(term);
second.getNext();
}
else
{
sum.setNext(first);
term = new termNode(first.getNext());
sum.setNext(term);
first.getNext();
}
}
while (first != null)
{
sum.setNext(first);
}
while (second != null)
{
sum.setNext(second);
}
return r;
}
}
Here is my Node class:
class termNode implements Comparable
{
private int exp;
private double coeff;
private termNode next;
public termNode(double coefficient, int exponent)
{
coeff = coefficient;
exp = exponent;
next = null;
}
public termNode(termNode inTermNode)
{
coeff = inTermNode.coeff;
exp = inTermNode.exp;
}
public void setData(double coefficient, int exponent)
{
coefficient = coeff;
exponent = exp;
}
public double getCoeff()
{
return coeff;
}
public int getExp()
{
return exp;
}
public void setNext(termNode link)
{
next = link;
}
public termNode getNext()
{
return next;
}
public String toString()
{
if (exp == 0)
{
return(coeff + " ");
}
else if (exp == 1)
{
return(coeff + "x");
}
else
{
return(coeff + "x^" + exp);
}
}
public int compareTo(Object other)
{
if(exp ==((termNode) other).exp)
return 0;
else if(exp < ((termNode) other).exp)
return -1;
else
return 1;
}
}
And here is my Test class to run the program.
import java.util.Scanner;
class PolyTest{
public static void main(String [] args)
{
Scanner kb = new Scanner(System.in);
Polynomial r;
Polynomial p = new Polynomial();
System.out.println("Enter first polynomial.");
p.readPolynomial(kb);
Polynomial q = new Polynomial();
System.out.println();
System.out.println("Enter second polynomial.");
q.readPolynomial(kb);
r = Polynomial.add(p,q);
System.out.println();
System.out.print("The sum of ");
p.display();
System.out.print(" and ");
q.display();
System.out.print(" is ");
r.display();
}
}
Situation: jax-ws web service on Weblogic appserver; wsdl first development, jaxb customizations in external binding file.
I would like to get a handle to the actual jaxb context that will process the incoming soap xml message, before it has been unmarshalled into java objects.
Then I would like to get the unmarshaller of this jaxb context - the one that actually will be used during the unmarshalling. And then setup some properties of this unmarshaller (e.g. listener and idresolver).
I am currently using Selenium 2.0a2 in Java to access the Internet using an HtmlUnitDriver instance. The problem I am facing is that, when I attempt to access slow websites, the request times out. How can I increase the time that WebDriver waits before throwing a timeout exception?
Anyone used Hibernate to access a DB in a pure java app (not a web application)? What was your experience like, did it take long to set up and get going?
Hi,
I have some non well-formed xml (HTML) data in JAVA, I used JAXP Dom, but It complains.
The Question is :Is there any way to
use JAXP to parse such documents ??
I have a file containing data such as :
<employee>
<name value="ahmed" > <!-- note, this element is not closed, So it is not well-formed xml-->
</employee>
I am working on a java Ant+Ivy based project that has the following directory structure:
projectRoot/src
projectRoot/classes
projectRoot/conf
projectRoot/webservices
this works perfectly well in Ant but I am looking to migrate to Gradle.
Is there a way to define a non-maven directory structure in gradle or should I be looking to mavenize?
I want to implement a Custom logger which logs all log entries to a Database.
Currently my app logs this way (slf4j and log4j binding):
private static final Logger logger = LoggerFactory.getLogger( MyClass.class );
I'm not sure how to proceed.
My Idea is to implement a Custom Logging binding
through implementing the org.slf4j.Logger Interface
What would be the next steps?
My target is to not change the current code
Links I considered:
http://stackoverflow.com/questions/1770442/java-custom-logger-logging-standards-or-and-best-practices
http://www.slf4j.org/manual.html
How could I write a simple program using OpenType tables in order to dynamically render text?
please answer in :
assembly , C , C++ , C# , java or Python (and a little WPF:-)
or introduce libraries of them.
comments and answers about text rendering system of common Operating Systems, or designing text engines compatible with unicode 5.02 protocol are welcomed.
Hi,
Is it possible to calculate the bounds of a htmlized String in Java Swing?
I tried using the BasicHtml.createHTMLView, but kept getting the same prefSpan; irrespective of the component font.
Regards,
Pavan
I want to have the text say one thing, but have the value say another
Text Key
But it only takes a string for adding items.
How do Java programmers typically store text/id pairs in comboboxes
Hello
Does anyone know if there's a method in Joda Time or Java itself which takes either an int or a String as an argument, e.g. 4 or "4" and gives the name of the month back in short format, i.e. JAN for January?
I suppose long month names can be truncated and converted to upper case.
Thanks
Mr Morgan.
I have a java.io.Reader as the return type of my method. But i have Object type of an instance which i get from Database. So how can I convert this to Reader type and return?
need help
thanks.
This is my problem, I have to use a big SP, and there is no time to rewrite in java.
So I'm using Hibernate criteria and I don't know if i can call it. Thanks to all.
Hi,
As part of a homework assignment, I have to program a simple chess game in Java. I was thinking of taking the opportunity to experiment with recursion, and I was wondering if there's an obvious candidate in chess for recursive code?
Thank you,
JDelage