Access modifiers

Example

Recommended Reading

The Java Platform

Java Runtime Environment

Packages & Access Modifiers

Packages

The package directive

The import directive

Encapsulation and Access to Class Members

Access modifiers

Example

Download the sample project (zipped) for the example.

Invoke eclipse

Create a new project
Import the zipped file into the project

Study the java programs

./graphicalobject/BaseGraphicElem.java
./graphicalobject/Coordinate.java
./graphicalobject/impl/Rectangle.java
./graphicalobject/impl/Circle.java
./graphicalobject/GraphicElement.java
./drawing/Drawing.java
./DrawingEditor.java

Run the program and look at the result
Try the follwoing:
1. In the Coordinate class, change the access keyword for the instance variable x to private.
2. In the GraphicElement interface, add a method definition public void setColor(String color).
3. In the BaseGraphicElem class, change the method public void move(Coordinate coord) to final