Answer / anjani kumar jha

Before understand the concept of Catch u have to understand
the concept of try,that is why try?

Try-------it is used when we know that some piece of code is
going to throw some exception example when u are dividing
somthing/0 means it may throw exception so we use the try
block and put that code inside the try block

Catch:--------Every try there must be catch or finally
block. Catch is used to catch to exception.As for example
the division example may throw airthmatic exception so will
declare this exception in catch like

Catch(AirthmaticException ae)
{
System.out.println("hi cannt divide by zero");
System.out.println(ae);
}

Answer / sreenu karampudi

The Catch block is used to catch the exception which is
from the try block. The exception type should be same in
order to catch it otherwise it won't

for example;

try {
// piece of code which gets ArthimeticException
}

Catch(ArthimeticException e) [
}

Answer / kabita

bcoz Exception is d base class of all exceptions arise in d
programme.if u write this no need to consider what type of
exception is arised in try block of d programme.,it will
handle all d exception.

How to create a thread in java?

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Write a method to check if input string is palindrome?

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justify c is portable

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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)

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How does synchronized modifier work?

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What is the basic functionality of DataOutput interface in java?

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What will happen if there is a default method conflict as mentioned above and we have specified the same signature method in the base class instead of overriding in the existing class ?

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Is zero a positive integer?

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What is difference between identifier and variable?

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How do listeners work?

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Which is better stringbuffer or stringbuilder?

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