Answer Posted / abcd

API: Application Progammable Interface.

An interface used to work with the application objects.

API 's are platfiorm specific. Sun MicroSystems has its own
API package specified for the jdk x.x

Microsoft wil have its own API....If you are using the
java ..then java based API..will support all the OOPS by
default.

Is java call by reference?

1015

---

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)

2326

---

What is treeset and treemap in java?

1137

---

What is a method in programming?

1224

---

What happens to the Exception object after handling an exception?

2423

---

what is method reference in java 8?

1084

---

How do you convert an int to a string in java?

1199

---

Why java is call by value?

1078

---

Why is serialization required?

1014

---

I want my class to be developed in such a way that no other class (even derived class) can create its objects. Define how can I do so?

1220

---

Does treeset allow null in java?

1003

---

What is balanced tree in java?

1013

---

Is vector thread safe in java?

1094

---

Can bool be null?

1028

---

What is a stringbuilder?

975

---