Solutions to selected exercises - An Introduction to Graphical User Interfaces with Java Swing - page 279

Solutions to
selected exercises

A

A.1

■

Chapter 2

A.1.1 2.1

Both windows close. The reason is that clicking the close button of a SimpleFrame
results in the command System.exit(0) . This terminates the application , i.e. the
program that contains the main -method. In our case this is SimpleFrameDriver .
As both frames are constructed there, both are terminated.

A.1.2 2.2

The present border components extend to fill the whole area.

A.2

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Chapter 4

A.2.1 4.2

The following listings of the package its.Light contain a traffic light simulation
in a model-view implementation.

File: its/Light/Constants.java

1.

package its.Light;

2.
3.
4.

public class Constants {

5.

public static final int LIGHT_RED = 1;

6.

public static final int LIGHT_RED_ORANGE = 2;

7.

public static final int LIGHT_GREEN = 3;

8.

public static final int LIGHT_ORANGE = 4;

9.

}