Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / p.nandakishore
the most time consuming process when we work with a
database is to create a connection object. when application
goes out of scope the object becomes a candidate for
grabage collector. every time we create and every it will
be destroyed. this as effect on a distributed application,
where n no clients are waiting for the response. Connection
pooling is a concept of object reusability.This is a
service provided by application servers.
| Is This Answer Correct ? | 4 Yes | 0 No |
Post New Answer View All Answers
What is linked hashset and its features?
How static variable work in java?
What is a vararg?
What is t in generics in java?
Question 5 [15] Consider the following classes, illustrating the Strategy design pattern: import java.awt.*; abstract class Text { protected TextApplet tA; protected Text(TextApplet tApplet) { tA = tApplet; } abstract public void draw(Graphics g); } class PlainText extends Text { protected PlainText(TextApplet tApplet) { super(tApplet); } public void draw(Graphics g) { g.setColor(tA.getColor()); g.setFont(new Font("Sans-serif", Font.PLAIN, 12)); g.drawString(tA.getText(), 20, 20); } } class CodeText extends Text { protected CodeText(TextApplet tApplet) { super(tApplet); } public void draw(Graphics g) { g.setColor(tA.getColor()); g.setFont(new Font("Monospaced", Font.PLAIN, 12)); g.drawString(tA.getText(), 20, 20); } } public class TextApplet extends java.applet.Applet { protected Text text; protected String textVal; protected Color color; public String getText() { return textVal; } public Color getColor() { return color; } public void init() { textVal = getParameter("text"); String textStyle = getParameter("style"); String textColor = getParameter("color"); if (textStyle == "code") text = new CodeText(this); else text = new PlainText(this); if (textColor == "red") color = Color.RED; else if (textColor == "blue") color = Color.BLUE; else color = Color.BLACK; } public void paint(Graphics g) { text.draw(g); 10 } } The Text class is more complicated than it should be (there is too much coupling between the Text and TextApplet classes). By getting rid of the reference to a TextApplet object in the Text class and setting the colour in the paint() method, one could turn the Text class into an interface and simplify the strategy classes considerably. 5.1 Rewrite the Text and PlainText classes to do what is described above. (6) 5.2 Explain the consequent changes that are necessary to the TextApplet class. (4) 5.3 Write an additional strategy class called FancyText (to go with your simplified strategy classes) to allow fancy text to be displayed for the value "fancy" provided for the style parameter. It should use the font Font ("Serif", Font.ITALIC, 12). (3) 5.4 Explain what changes are necessary to the TextApplet class for this. (2)
What is the use of arrays tostring () in java?
What are the access modifiers in java?
State two differences between C and Java.
Can we convert stringbuilder to string in java?
Can singleton class be serialized?
Why main function is static?
How would you format a date in java? I.e. In the ddmmyyy format?
What are the benefits of operations in java?
What is a wrapper method?
What is mvc in java?
