return the URL of the directory of the document in which an applet
is embedded. According to the 1.3 API doc, getCodeBase is supposed
to return the URL of the applet itself. The actual behavior is
reversed and has been reversed for a long time.
algol% cat SimpleApplet.java
import java.applet.Applet;
import java.awt.Graphics;
import java.awt.Color;
public class SimpleApplet extends Applet{
public void init() {
setBackground(Color.cyan);
}
public void start() {
System.out.println("starting...");
}
public void stop() {
System.out.println("stopping...");
}
public void destroy() {
System.out.println("preparing to unload...");
}
public void paint(Graphics g){
System.out.println("Paint");
g.setColor(Color.blue);
g.drawRect(0, 0, getSize().width -1, getSize().height -1);
g.setColor(Color.red);
g.drawString("getDocumentBase: "+getDocumentBase(), 15, 25);
g.drawString("getCodeBase: "+getCodeBase(), 15, 35);
}
}
algol% cat SimpleApplet.html
<HTML>
<BODY>
<APPLET CODE=SimpleApplet.class WIDTH=200 HEIGHT=100>
</APPLET>
</BODY>
</HTML>
I tested a large number of JDKs and found that the results have been stable
for a long time (at least on Solaris/sparc):
getDocumentBase file:/home/ajacobs/public_html/BasicJava1/SimpleApplet.html
getCodeBase file:/home/ajacobs/public_html/BasicJava1/
The JDKs checked: 1.1.6, 1.1.7, 1.1.8_13, 1.2 FCS, 1.2.1_004, 1.2.2_008,
1.2.2_08, 1.3.1, and 1.4.
Testing on Merlin (1.4) shows that behavior is consistent on Windows and
Intel/Solaris.
According to the JDK 1.3 API documentation, the results should have been
getCodeBase file:/home/ajacobs/public_html/BasicJava1/SimpleApplet.html
getDocumentBase file:/home/ajacobs/public_html/BasicJava1/
allan.jacobs@Eng 2001-05-09
Name: jk109818 Date: 11/05/2001
java version "1.3.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-C)
Java HotSpot(TM) Client VM (build 1.3.0-C, mixed mode)
In the API, getDocumentBase() is listed as "Return(ing) an absolute URL naming
the directory of the document in which the applet is embedded." However
getDocumentBase(), when a toString() is used prints "the URL of the applet
itself" -- the function listed for getCodeBase(). A Simalar screen print of the
toString() of getCodeBase() displays the base directory of the applet.
Please contact me if I have misinterpreted the API.
I have found this discrepancy on VM's 1.3.1 and 1.3.0.
(Review ID: 134789)
======================================================================
- duplicates
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JDK-4472003 getDocumentBase behave different with java api specification
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- Closed
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- Closed
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JDK-4252701 RFE: getCodeBase() and getDocumentBase() do not behave as documented
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- Closed
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- relates to
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- Resolved
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- Closed
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- Closed
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- Closed
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