I appreciate any help with these Java related questons! (1) What is the default

Question

I appreciate any help with these Java related questons!

(1) What is the default value of an integer variable when it is first declared?

(2) Which method call converts the value in variable stringVariable to a double?

(3) Variables should be declared as local variables of a method if ?

(4) One way to display a set of three JButtons horizontally arranged on the top of the display is to add the buttons to a JPanel with?           

(5) What event listener interface must be implemented by an object to enable it to handle events from a JButton?

(6) Which of the following is true for a JLabel?

(a) Can be used to display uneditable text.

(b) Can be used to display editable text.

(c) Enables users to enter a single line of data from the keyboard.

(d)Enables users to enter multiple lines of data from the keyboard.

(7) A JTextArea provides what?

(8) To draw a single line from (0, 15) to (20, 25), call the method ____?_____ of the Graphics class in the paintComponent method or in the paint method

(9) .If you are just interested in handling events when a key is typed, the easiest implementation is to?

Explanation / Answer

1) the default value for the integer is 0 when it is created

2)double.parseDouble();

3)if we want to use the variables only inside the methods and it should be visible outside

4)Jpanel j= new Jpanel();

        JButton jb1=new JButton();

         j.add(jb1);

5)ActionListener is the interface

6)uneditable text

7)JTextArea provides a space write something in it .we can define the size of the area that is to be provided

8)

9)there will keyboard listeners we can use them to handle the events

                  keyTyped(){}

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