Mark the following statements as true or false.
a. Every window has a width and height.
b. In Java, JFrame is a class.
c. To display the window, you need not invoke a method such as setVisible.
d. In Java, the reserved word extends allows you to create a new class from an existing one.
e. The window you see displayed on your screen is a class.
f. Labels are used to display the output of a program.
g. Every GUI component you need has to be created and added to a container.
h. In Java, implements is a keyword.
i. Clicking a button is an example of an action event.
j. In a problem statement, every verb is a possible class.
k. In a problem statement, every noun is a possible method.
l. To use an object, you must know how it is implemented.
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