¡@
java Programming Glossary: pointStringBuilder vs String concatenation in toString() in Java http://stackoverflow.com/questions/1532461/stringbuilder-vs-string-concatenation-in-tostring-in-java 3 properties it might not make a difference but at what point do you switch from concat to builder java performance string.. 3 properties it might not make a difference but at what point do you switch from concat to builder At the point where you're.. at what point do you switch from concat to builder At the point where you're concatenating in a loop that's usually when the..
Why JSF calls getters multiple times http://stackoverflow.com/questions/2090033/why-jsf-calls-getters-multiple-times should be used. They are executed only once at some point of request based JSF lifecycle and that's exactly what you want...
What is a Null Pointer Exception? http://stackoverflow.com/questions/218384/what-is-a-null-pointer-exception is a Null Pointer Exception What are null pointer exceptions and what causes them in general java nullpointerexception.. exceptions and what causes them in general java nullpointerexception share improve this question When you declare a.. variable i.e. an object you are really creating a pointer to an object. Consider the following code where you declare..
How to discover memory usage of my application in Android http://stackoverflow.com/questions/2298208/how-to-discover-memory-usage-of-my-application-in-android avoid one app from being able to stress the system to this point. Going lower level you can use the Debug API to get raw kernel.. be the more accurate one... but really this just leave the point take any memory info you get with a grain of salt often a very..
Avoiding “!= null” statements in Java? http://stackoverflow.com/questions/271526/avoiding-null-statements-in-java your answers I got a bunch of new insight. java null nullpointerexception code snippets code readability share improve this.. junior to intermediate developers tend to face at some point they either don't know or don't trust the contracts they are..
What is a raw type and why shouldn't we use it? http://stackoverflow.com/questions/2770321/what-is-a-raw-type-and-why-shouldnt-we-use-it and generates a compilation warning by the first bullet point in the above definition inn also has a raw type by the second.. definition inn also has a raw type by the second bullet point. MyType.Nested is not a parameterized type even though it's.. a parameterized type like List Object . To illustrate the point consider the following method which takes a List Object and..
JSTL in JSF2 Facelets… makes sense? http://stackoverflow.com/questions/3342984/jstl-in-jsf2-facelets-makes-sense because the complete view tree isn't available yet at the point JSTL runs . If you're expecting or storing some state in the..
Switch Statement with Strings in Java http://stackoverflow.com/questions/338206/switch-statement-with-strings-in-java going to be put into a later Java version Can someone point me to an article or themselves explain why I can't do this as.. subtracting the lowest value into a table of instruction pointers&mdash the tableswitch instruction. If the constants are sparse..
Design Patterns web based applications http://stackoverflow.com/questions/3541077/design-patterns-web-based-applications Please you guide us in choosing the best design.Also any pointer to a good design pattern material will be welcome. java design.. only a single servlet which provides a centralized entry point of all requests. It should create the Model based on information..
Why not use Double or Float to represent currency? http://stackoverflow.com/questions/3730019/why-not-use-double-or-float-to-represent-currency reason I simply do not know what it is. P java floating point currency share improve this question Because floats and doubles.. base 10 rational numbers. This is how an IEEE 754 floating point number works it dedicates a bit for the sign a few bits to store.. example you simply cannot store 0.1 inside a floating point variable. You'll get the nearest representable value which is..
How do I write a correct micro-benchmark in Java? http://stackoverflow.com/questions/504103/how-do-i-write-a-correct-micro-benchmark-in-java with an at sign to denote the non initial entry point for example Trouble 1 run @ 2 41 bytes . Prefer server to client..
How to reference components in JSF ajax? Cannot find component with identifier “foo” in view http://stackoverflow.com/questions/8634156/how-to-reference-components-in-jsf-ajax-cannot-find-component-with-identifier a NamingContainer by the rules in the previous bullet point. Then the findComponent method of this NamingContainer will..
http://stackoverflow.com/questions/13022754/java-bouncing-ball height y height size.height ball.setLocation new Point x y while getParent .isVisible Repaint the balls pen... SwingUtilities.invokeLater.. getParent return parent public void move Ball ball Point p ball.getLocation Point speed ball.getSpeed Dimension size.. public void move Ball ball Point p ball.getLocation Point speed ball.getSpeed Dimension size ball.getSize int vx speed.x..
Swing animation running extremely slow http://stackoverflow.com/questions/14886232/swing-animation-running-extremely-slow class. The Car class has the following relevant attributes Point currentPos The current position initialized in another method.. if cars.isEmpty cars.get i .setLocation new Point getModel.getCars .get i .move if i cars.size 1 i 0 else .. import java.awt.GridLayout import java.awt.Point import java.awt.RenderingHints import java.awt.event.ActionEvent..
Floating point arithmetic not producing exact results in Java http://stackoverflow.com/questions/1661273/floating-point-arithmetic-not-producing-exact-results-in-java What Every Computer Scientist Should Know About Floating Point Arithmetic for the background of why you're getting those results...
GUI not working after rewriting to MVC http://stackoverflow.com/questions/3066590/gui-not-working-after-rewriting-to-mvc model.check public void mousePressed MouseEvent e Point mouse new Point mouse e.getPoint if model.isPlaying if mouse.x.. public void mousePressed MouseEvent e Point mouse new Point mouse e.getPoint if model.isPlaying if mouse.x 350 int button.. mousePressed MouseEvent e Point mouse new Point mouse e.getPoint if model.isPlaying if mouse.x 350 int button 1 int mouse.y..
JTable design to synchronize with back-end data-structure http://stackoverflow.com/questions/3590897/jtable-design-to-synchronize-with-back-end-data-structure currentText popup.setLocationRelativeTo editorComponent Point p editorComponent.getLocationOnScreen popup.setLocation p.x..
Draw a line in a JPanel with button click in Java http://stackoverflow.com/questions/5797862/draw-a-line-in-a-jpanel-with-button-click-in-java import java.awt.Graphics2D import java.awt.Point import java.awt.RenderingHints import java.awt.event.ActionEvent.. private MouseHandler mouseHandler new MouseHandler private Point p1 new Point 100 100 private Point p2 new Point 540 380 private.. mouseHandler new MouseHandler private Point p1 new Point 100 100 private Point p2 new Point 540 380 private boolean drawing..
Remove Top-Level Container on Runtime http://stackoverflow.com/questions/6309407/remove-top-level-container-on-runtime Dialog On Runtime setLocation 150 150 pack setVisible true Point loc this.getLocation top loc.x left loc.y AddNewDialog private..
http://stackoverflow.com/questions/8614972/passing-current-date for int i 0 i 35 i Star star new Star new Point random.nextInt 490 random.nextInt 490 star.setColor new Color.. private static final long serialVersionUID 1L private Point location null private Color color Color.YELLOW private int xIncr.. int xIncr yIncr static final int WIDTH 500 HEIGHT 500 Star Point location int x location.x int y location.y this.location location..
|