deeply love java

setCellRenderer(TableCellRenderer cellRenderer)

2008-09-18T04:47:00.001-07:00

set data in the table

eclipse

2008-08-05T01:21:00.001-07:00

set classpath:

.classpath

event dispatch thread

2008-07-23T23:09:00.000-07:00

all access to Swingcomponents needs to be done from a single thread—the event-dispatch thread

how to know whether you are in event dispatch thread
method1:
EventQueue.isDispatchThread()

method2:
SwingUtilities.isEventDispatchThread()

how to give tasks to event diskpatch thread:
add runnable object to event queue
method1:
EventQueue.invokeLater(Runnable runnable)
don't care when the task finishes

method2:
EventQueue.invokeAndWait(Runnable runnable)
wait until task done

ex:
Runner runner = new Runnable(){
public void run(){
JFrame frame=new JFrame();
frame.setVisible(true);
}
};
EventQueue.

JTable

2008-07-23T02:03:00.000-07:00

JTable's mothod

getModel:

Returns the TableModel that provides the data displayed by this JTable.

modify table's behavior:

define a class that extends DefaultTableModel

DefaultTableModel's method

void addRow(Object[] rowData)

JOptionPane

2008-07-18T00:54:00.000-07:00

show message box

showConfirmDialog

Asks a confirming question, like yes/no/cancel.

showInputDialog

Prompt for some input.

showMessageDialog

Tell the user about something that has happened.

showOptionDialog

The Grand Unification of the above three.

ant

2008-06-29T07:23:00.000-07:00

like makefile

use xml

create a file called build.xml. Then run ant. Then the project is compiled

( ant -verbose will print more information)

the top level element is project, its default attribute decides which target to do

ex:

the target's depends property decides what targets must be done before it

ex:

how to run ant:

1. ant

this will execute default target

2. ant targetName

show information about build.xml

ant -projecthelp

show the targets with their description

( the description is described by description property of each target)

some useful tasks:

1. javac srcdir="src", destdir="bin"

compile java codes

2. <echo>hello</echo>

print message when running ant

3, <mkdir dir="test/bin"/>

4. <jar destfile="dist/test.jar" basedir="bin" />

5. <delete dir="bin" />

6. <java classname="Test.Main" classpath="bin">

</java>

jh.jar, jmf.jar

2008-06-25T23:38:00.001-07:00

javax.help package is in jh.jar

javax.media package is in jmf.jar

System.getProperty

2008-06-24T19:26:00.001-07:00

ex:

System.getProperty("java.library.path")

export jar on jbuilder 2007

2008-06-18T19:50:00.000-07:00

(1) when export:

choose src folder of each project

check:

Export all output folders for checked projects

add directory entries

manifest

2008-06-17T02:28:00.000-07:00

set main class for jar

syntax:

ex:

manifest.txt

Main-Class: test.MainApp

jar

2008-06-16T04:40:00.000-07:00

when creating jar, the package directory is created according to your command

Hence, if you want the class in test package , you must use

jar cvmf manifest.txt test

If test is in another directory , and you use

jar cvmf manifest.txt ../test

It will create test directory below .. directory, so it can not find test/*.class