Answer Posted / pushpa

"Java" generally refers to a combination of three things:
the Java programming language (a high-level, object-oriented
programming language); the Java Virtual Machine (a
high-performance virtual machine that executes bytecodes on
a specific computing platform, typically abbreviated JVM);
and the Java platform, a JVM running compiled Java
bytecodes, usually calling on a set of standard libraries
such as those provided by Java Standard Edition (SE) or
Enterprise Edition (EE). Though coupled by design, the
language does not imply the JVM, and vice versa.

What does next mean in java?

924

---

Can we write class inside a class in java?

920

---

Can we sort array in java?

888

---

How do you reverse a string in java without using string buffer?

1039

---

What is the argument in java?

868

---

how to handle exceptions in ejb?

2259

---

How objects of a class are created if no constructor is defined in the class?

1017

---

design an lru cache in java?

937

---

What are java annotations?

1067

---

What are the steps involved to create a bean?

1095

---

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)

2229

---

Is class is a data type?

1019

---

What is initial size of arraylist in java?

992

---

Implement a stack with push (), pop() and min() in O(1) time.

1032

---

What are the supported platforms by java programming language?

1002

---