Errata for Java AWT Reference

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in Figure 4-1 as the basis," in section 4.1.3: The call path shown is generated by following the methods called from the Java source code (.java files). It is possible that a platform reduces the overhead by performing some operations in the Java peers.

public boolean keyDown(Event e, int key) public boolean keyUp(Event e, int key) should both have a hollow star (Java 1.0 depricated method) next to them. keyDown currently has a solid star and keyUp does not have either.

if you try to add _component_ to to a container that already contains it, the COMPONENT is removed and re-added, probably at a different position.

invalidates the children" should be "recursively invalidates the parent containers"

[This includes top of the next page] With the 1.1 event model, you register listeners for different event types; the listeners are told when the event happens. The Frame class inherits all its listener handling from Window. With Java 1.1, it isn't necessary to subclass Frame to handle the WINDOW_CLOSING events. The equivalent Java 1.1 code to handle the event follows: Frame f = new Frame(); f.addWindowListener (new WindowAdapter() { public void windowClosing (WindowEvent e) { setVisible(false); dispose(); System.exit(0); } }); This adds an anonymous inner class of type WindowAdapter as the WindowListener. When the window closing event happens, it causes the program to exit. Every Frame created should include code like this to make sure they terminate gracefully.

sentence 2: "Index 0 is an array of widths" should be "Index 0 is a copy of an array of widths" and "index 1 is an array of heights" should be "index 1 is a copy of an array of heights"

Checkbox getSelectedCheckbox()".

(Event e)"

public void addActionListener(ItemListener listener) should be public synchronized void addActionListener(ActionListener listener) and the list item: public void removeActionListener(ItemListener listener) should be public synchronized void removeActionListener(ActionListener listener)

but using 1.0 event model. CheckboxMenuItem is supposed to return an arg, which is the string of the label of the CheckboxMenuItem. Instead, the arg of action() produces a boolean, which is the state of the CheckboxMenuItem. from the author: The behavior that you noticed seems to be a compatibility difference that Sun doesn't document and I missed too. Under 1.0, the CheckboxMenuItem action has the label as its argument. While running a 1.0 event model program under 1.1, this is the state.

description should be changed to: Notifies container's layout manager of invalid state and invalidates parent containers.

"AWTEvent", not "Event". This should also be corrected in the parameter description where "Event" appears in Courier. There needs to be a star or a footnote for this change. In Java 1.0, the parameter is of type Event. However, in 1.1, the parameter is of type AWTEvent.

the <APPLET> tag in HTML. According to Sun's documentation, and confirmed by my own testing, the correct name of this parameter is "ARCHIVE" (no plural).

first sentence: "filename.zip/filename/jar, optional. Points to a comma-separated list of uncompressed ZIP or JAR files that contain one or more Java classes. Each file is downloaded once to the user's disk and serched for the class named in the CODE parameter, and any helper classes required to execute that class. . . ."