Programming and Problem Solving with Java

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Programming Problems

1.Java systems provide a set of user-defined types that duplicate the names of

primitive types except that the first letter of the type name is capitalized (for ex-

ample,Doubleand Longinstead of doubleand long). The one exception is that the

type corresponding to intis called Integer. Each of these types contains declara-

tions of constants related to the corresponding primitive type. Two of these con-

stants are Integer.MAX_VALUEand Integer.MIN_VALUE, the largest and smallest int

values that Java allows. Write an application to display the values of

Integer.MAX_VALUEand Integer.MIN_VALUE. The output should identify which value

is Integer.MAX_VALUEand which value is Integer.MIN_VALUE. Be sure to include ap-

propriate comments in your code, and use indentation as we do in the code in

this chapter. Each of these types defines similar constants, so you may want to

extend your application to display Long.MIN_VALUE, and so on, just to learn what

the actual maximum and minimum numbers are for each of the primitive types.

2.Write an application that outputs three lines as follows:

7 / 4 using integer division equals <result>

7 / 4 using floating-point division equals <result>

7 modulo 4 equals <result>

where <result>stands for the result computed by your application. Use named

constants for 7 and 4 everywhere in your application (including the output state-

ments) to make the application easy to modify. Be sure to include appropriate

comments in your code, choose meaningful identifiers, and use indentation as

we do in the code in this chapter.

3.Write a Java application that takes an integral Celsius temperature as input and

converts it to its Fahrenheit equivalent. The formula is

Fahrenheit = Celsius + 32

After the Celsius temperature is input, it should be displayed along with the cor-

responding Fahrenheit equivalent. The application should include appropriate

messages identifying each value. Be sure to include appropriate comments in

your code, choose meaningful identifiers, and use indentation as we do in the

code in this chapter.

4.Write an application to calculate the diameter, circumference, and area of a cir-

cle with a radius input by the user. Assign the radius to a floatvariable, and then

output the radius with an appropriate message. Declare a named constant PI

with the value 3.14159. The application should output the diameter,

circumference, and area, each on a separate line, with identifying labels. Be sure

to include appropriate comments in your code, choose meaningful identifiers,

and use indentation as we do in the code in this chapter.

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