Java 7 for Absolute Beginners

CHAPTER 3 ■ DATA TYPES

} else {

return NORTH;

}

}

}

Now that we have our completed enumeration, we need a test program to see how it works. Listing

3-17 shows a program class that does the job.

Listing 3-17. A test class for our enumeration

package com.bryantcs.examples.enumExample;

public class EnumExample {

public static void main(String[] args) {

int[] compassPoints = {22, 77, 144, 288};

for (int i = 0; i < compassPoints.length; i++) {

System.out.println(compassPoints[i] + " degrees is (very roughly) "

+ Direction.findCardinalDirection(compassPoints[i]));

}

for (Direction d : Direction.values()) {

System.out.println(d + " is " + d.getDegrees() + " degrees.");

}

}

}

EnumExample produces the output in the console shown in Listing 3-18.

Listing 3-18. EnumExample output

22 degrees is (very roughly) NORTH

77 degrees is (very roughly) EAST

144 degrees is (very roughly) SOUTH

288 degrees is (very roughly) WEST

NORTH is 0 degrees.

EAST is 90 degrees.

SOUTH is 180 degrees.

WEST is 270 degrees.

Summary

In this chapter, we learned the basics about the various data types that are available in Java. We found

out:

• The size restrictions of the various numeric data types


• How the boolean data type works


• How char variables and String objects work and a bit about how they can interact