[hardwired]

Code:

C:\jexp>javac compiletest.java
compiletest.java:7: CompileTest is not abstract and does not override abstract m
ethod actionPerformed(java.awt.event.ActionEvent) in java.awt.event.ActionListen
er
public class CompileTest extends JApplet implements ActionListener
       ^
compiletest.java:36: cannot find symbol
symbol  : method getState()
location: class javax.swing.JCheckBox
        if(cocktailBox.getState())
                      ^
compiletest.java:40: cannot find symbol
symbol  : method getState()
location: class javax.swing.JCheckBox
        if(dinnerBox.getState())
                    ^
3 errors

1 — The class signature implements ActionListener. The rule/contract with interfaces is this: if you implement an interface you promise to provide an implementation for each method it defines. Look up the ActionListener interface in the javadocs and find its only method is

Code:

public void actionPerformed(ActionEvent e) { }

This exact method signature must appear in the class that implements the ActionListener interface.
2 — getState is in the java.awt.Checkbox class api.
You are using a javax.swing.JCheckBox, a very different component. For this class you would use the isSelected method which JCheckBox inherits from its superclass AbstractButton - see JCheckBox api.

This method signature is incorrect.

Code:

    public void itemStateChanged(ActionEvent check)

The itemStateChanged method is defined by the ItemListener interface and its argument is an ItemEvent.