j2re1.5-sun是java的运行包，j2sdk1.5-sun是java的开发包（当然也含有运行包），择一安装
安装
1）安装sun-j2re1.5（截止到现在的是1.5up6）
~#sudo apt-get install sun-j2re1.5 2）~#
cd /usr/lib/mozilla-firefox/plugins 3）
~#sudo ln -s /usr/lib/j2re1.5-sun/plugin/i386/ns7/libjavaplugin_oji.so 4）
~#sudo ln -sf /usr/lib/j2re1.5-sun/bin/java_vm /usr/bin/java_vm 5）~#
sudo update-alternatives --install /usr/bin/java java /usr/lib/j2re1.5-sun/bin/java 1 6）现在当你运行'
sudo update-alternatives --config java'时，刚刚安装的JRE就出现在列表中，选择sun java选项，然后运行 '
java -version'命令，确保它能运行。命令输出如下：
java version "1.5.0_05" Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_05-b05) Java HotSpot(TM) Client VM (build 1.5.0_05-b05, mixed mode, sharing)
完成！
7）如果你想使用java控制面板修改一些配置，可以运行以下命令：
~#sh /usr/lib/j2re1.5-sun/bin/ControlPanel 如果窗口中文不能显示，按照下面的设置：
a）进入J2RE的库目录
~#cd /usr/lib/j2re-sun/lib b）用RedHat的模板将老的fontconfig.properties替换掉（但是我发现本来根本没有这个文件，不管，创建一个），以方便修改，然后对其进行编辑
~#sudo cp fontconfig.RedHat.3.properties.src fontconfig.properties ~#sudo vi fontconfig.properties 修改成以下样式，直接拷贝下来也成：
# @(#)linux.fontconfig.RedHat.3.properties 1.1 03/12/10
#
# Copyright 2003 Sun Microsystems, Inc. All rights reserved.
#
# Version
version=1
# Component Font Mappings
#allfonts.chinese-gb18030=-misc-zysong18030-medium-r-normal--*-%d-*-*-c-*-iso10646-1
#allfonts.chinese-gb18030.motif=-isas-song ti-medium-r-normal--*-%d-*-*-c-*-gb2312.1980-0
#allfonts.chinese-big5=-arphic technology co.-ar pl mingti2l big5-medium-r-normal--*-%d-*-*-c-*-iso10646-1
#allfonts.chinese-big5.motif=-taipei-fixed-medium-r-normal--*-%d-*-*-c-*-big5-0
#allfonts.lucida=-b&h-lucidasans-medium-r-normal-sans-*-%d-*-*-p-*-iso8859-1
# 中文字体支持部分=====
allfonts.chinese-gb18030=-misc-vera sans yuanti-medium-r-normal--*-%d-*-*-*-*-iso10646-1
allfonts.chinese-gb18030.motif=-misc-vera sans yuanti-medium-r-normal--*-%d-*-*-*-*-gb2312.1980-0
allfonts.chinese-big5=-misc-vera sans yuanti-medium-r-normal--*-%d-*-*-*-*-iso10646-1
allfonts.chinese-big5.motif=-misc-vera sans yuanti-medium-r-normal--*-%d-*-*-*-*-gb18030.2000-0
# =====中文字体支持部分
serif.plain.japanese-x0208=-misc-kochi mincho-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0
serif.plain.korean=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-iso10646-1
serif.plain.korean.motif=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-ksc5601.1987-0
serif.plain.latin-1=-b&h-lucidabright-medium-r-normal--*-%d-*-*-p-*-iso8859-1
serif.plain.latin-1.motif=-b&h-luxi serif-medium-r-normal--*-%d-*-*-p-*-iso8859-1
serif.bold.japanese-x0208=-misc-kochi mincho-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0
serif.bold.korean=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-iso10646-1
serif.bold.korean.motif=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-ksc5601.1987-0
serif.bold.latin-1=-b&h-lucidabright-demibold-r-normal--*-%d-*-*-p-*-iso8859-1
serif.bold.latin-1.motif=-b&h-luxi serif-bold-r-normal--*-%d-*-*-p-*-iso8859-1
serif.italic.japanese-x0208=-misc-kochi mincho-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0
serif.italic.korean=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-iso10646-1
serif.italic.korean.motif=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-ksc5601.1987-0
serif.italic.latin-1=-b&h-lucidabright-medium-i-normal--*-%d-*-*-p-*-iso8859-1
serif.italic.latin-1.motif=-b&h-luxi serif-medium-i-normal--*-%d-*-*-p-*-iso8859-1
serif.bolditalic.japanese-x0208=-misc-kochi mincho-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0
serif.bolditalic.korean=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-iso10646-1
serif.bolditalic.korean.motif=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-ksc5601.1987-0
serif.bolditalic.latin-1=-b&h-lucidabright-demibold-i-normal--*-%d-*-*-p-*-iso8859-1
serif.bolditalic.latin-1.motif=-b&h-luxi serif-bold-i-normal--*-%d-*-*-p-*-iso8859-1
sansserif.plain.japanese-x0208=-misc-kochi gothic-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0
sansserif.plain.korean=-misc-baekmuk gulim-medium-r-normal--*-%d-*-*-c-*-iso10646-1
sansserif.plain.korean.motif=-misc-baekmuk gulim-medium-r-normal--*-%d-*-*-c-*-ksc5601.1987-0
sansserif.plain.latin-1=-b&h-lucidasans-medium-r-normal-sans-*-%d-*-*-p-*-iso8859-1
sansserif.plain.latin-1.motif=-b&h-luxi sans-medium-r-normal--*-%d-*-*-p-*-iso8859-1
sansserif.bold.japanese-x0208=-misc-kochi gothic-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0
sansserif.bold.korean=-misc-baekmuk gulim-medium-r-normal--*-%d-*-*-c-*-iso10646-1
sansserif.bold.korean.motif=-misc-baekmuk gulim-medium-r-normal--*-%d-*-*-c-*-ksc5601.1987-0
sansserif.bold.latin-1=-b&h-lucidasans-bold-r-normal-sans-*-%d-*-*-p-*-iso8859-1
sansserif.bold.latin-1.motif=-b&h-luxi sans-bold-r-normal--*-%d-*-*-p-*-iso8859-1
sansserif.italic.japanese-x0208=-misc-kochi gothic-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0
sansserif.italic.korean=-misc-baekmuk gulim-medium-r-normal--*-%d-*-*-c-*-iso10646-1
sansserif.italic.korean.motif=-misc-baekmuk gulim-medium-r-normal--*-%d-*-*-c-*-ksc5601.1987-0
sansserif.italic.latin-1=-b&h-lucidasans-medium-i-normal-sans-*-%d-*-*-p-*-iso8859-1
sansserif.italic.latin-1.motif=-b&h-luxi sans-medium-i-normal--*-%d-*-*-p-*-iso8859-1
sansserif.bolditalic.japanese-x0208=-misc-kochi gothic-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0
sansserif.bolditalic.korean=-misc-baekmuk gulim-medium-r-normal--*-%d-*-*-c-*-iso10646-1
sansserif.bolditalic.korean.motif=-misc-baekmuk gulim-medium-r-normal--*-%d-*-*-c-*-ksc5601.1987-0
sansserif.bolditalic.latin-1=-b&h-lucidasans-bold-i-normal-sans-*-%d-*-*-p-*-iso8859-1
sansserif.bolditalic.latin-1.motif=-b&h-luxi sans-bold-i-normal--*-%d-*-*-p-*-iso8859-1
monospaced.plain.japanese-x0208=-misc-kochi mincho-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0
monospaced.plain.korean=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-iso10646-1
monospaced.plain.korean.motif=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-ksc5601.1987-0
monospaced.plain.latin-1=-b&h-lucidatypewriter-medium-r-normal-sans-*-%d-*-*-m-*-iso8859-1
monospaced.plain.latin-1.motif=-b&h-luxi mono-medium-r-normal--*-%d-*-*-m-*-iso8859-1
monospaced.bold.japanese-x0208=-misc-kochi mincho-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0
monospaced.bold.korean=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-iso10646-1
monospaced.bold.korean.motif=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-ksc5601.1987-0
monospaced.bold.latin-1=-b&h-lucidatypewriter-bold-r-normal-sans-*-%d-*-*-m-*-iso8859-1
monospaced.bold.latin-1.motif=-b&h-luxi mono-bold-r-normal--*-%d-*-*-m-*-iso8859-1
monospaced.italic.japanese-x0208=-misc-kochi mincho-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0
monospaced.italic.korean=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-iso10646-1
monospaced.italic.korean.motif=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-ksc5601.1987-0
monospaced.italic.latin-1=-b&h-lucidatypewriter-medium-i-normal-sans-*-%d-*-*-m-*-iso8859-1
monospaced.italic.latin-1.motif=-b&h-luxi mono-medium-i-normal--*-%d-*-*-m-*-iso8859-1
monospaced.bolditalic.japanese-x0208=-misc-kochi mincho-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0
monospaced.bolditalic.korean=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-iso10646-1
monospaced.bolditalic.korean.motif=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-ksc5601.1987-0
monospaced.bolditalic.latin-1=-b&h-lucidatypewriter-bold-i-normal-sans-*-%d-*-*-m-*-iso8859-1
monospaced.bolditalic.latin-1.motif=-b&h-luxi mono-bold-i-normal--*-%d-*-*-m-*-iso8859-1
dialog.plain.japanese-x0208=-misc-kochi gothic-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0
dialog.plain.korean=-misc-baekmuk gulim-medium-r-normal--*-%d-*-*-c-*-iso10646-1
dialog.plain.korean.motif=-misc-baekmuk gulim-medium-r-normal--*-%d-*-*-c-*-ksc5601.1987-0
dialog.plain.latin-1=-b&h-lucidasans-medium-r-normal-sans-*-%d-*-*-p-*-iso8859-1
dialog.plain.latin-1.motif=-b&h-luxi sans-medium-r-normal--*-%d-*-*-p-*-iso8859-1
dialog.bold.japanese-x0208=-misc-kochi gothic-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0
dialog.bold.korean=-misc-baekmuk gulim-medium-r-normal--*-%d-*-*-c-*-iso10646-1
dialog.bold.korean.motif=-misc-baekmuk gulim-medium-r-normal--*-%d-*-*-c-*-ksc5601.1987-0
dialog.bold.latin-1=-b&h-lucidasans-bold-r-normal-sans-*-%d-*-*-p-*-iso8859-1
dialog.bold.latin-1.motif=-b&h-luxi sans-bold-r-normal--*-%d-*-*-p-*-iso8859-1
dialog.italic.japanese-x0208=-misc-kochi gothic-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0
dialog.italic.korean=-misc-baekmuk gulim-medium-r-normal--*-%d-*-*-c-*-iso10646-1
dialog.italic.korean.motif=-misc-baekmuk gulim-medium-r-normal--*-%d-*-*-c-*-ksc5601.1987-0
dialog.italic.latin-1=-b&h-lucidasans-medium-i-normal-sans-*-%d-*-*-p-*-iso8859-1
dialog.italic.latin-1.motif=-b&h-luxi sans-medium-i-normal--*-%d-*-*-p-*-iso8859-1
dialog.bolditalic.japanese-x0208=-misc-kochi gothic-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0
dialog.bolditalic.korean=-misc-baekmuk gulim-medium-r-normal--*-%d-*-*-c-*-iso10646-1
dialog.bolditalic.korean.motif=-misc-baekmuk gulim-medium-r-normal--*-%d-*-*-c-*-ksc5601.1987-0
dialog.bolditalic.latin-1=-b&h-lucidasans-bold-i-normal-sans-*-%d-*-*-p-*-iso8859-1
dialog.bolditalic.latin-1.motif=-b&h-luxi sans-bold-i-normal--*-%d-*-*-p-*-iso8859-1
dialoginput.plain.japanese-x0208=-misc-kochi mincho-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0
dialoginput.plain.korean=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-iso10646-1
dialoginput.plain.korean.motif=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-ksc5601.1987-0
dialoginput.plain.latin-1=-b&h-lucidatypewriter-medium-r-normal-sans-*-%d-*-*-m-*-iso8859-1
dialoginput.plain.latin-1.motif=-b&h-luxi mono-medium-r-normal--*-%d-*-*-m-*-iso8859-1
dialoginput.bold.japanese-x0208=-misc-kochi mincho-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0
dialoginput.bold.korean=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-iso10646-1
dialoginput.bold.korean.motif=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-ksc5601.1987-0
dialoginput.bold.latin-1=-b&h-lucidatypewriter-bold-r-normal-sans-*-%d-*-*-m-*-iso8859-1
dialoginput.bold.latin-1.motif=-b&h-luxi mono-bold-r-normal--*-%d-*-*-m-*-iso8859-1
dialoginput.italic.japanese-x0208=-misc-kochi mincho-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0
dialoginput.italic.korean=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-iso10646-1
dialoginput.italic.korean.motif=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-ksc5601.1987-0
dialoginput.italic.latin-1=-b&h-lucidatypewriter-medium-i-normal-sans-*-%d-*-*-m-*-iso8859-1
dialoginput.italic.latin-1.motif=-b&h-luxi mono-medium-i-normal--*-%d-*-*-m-*-iso8859-1
dialoginput.bolditalic.japanese-x0208=-misc-kochi mincho-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0
dialoginput.bolditalic.korean=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-iso10646-1
dialoginput.bolditalic.korean.motif=-misc-baekmuk batang-medium-r-normal--*-%d-*-*-c-*-ksc5601.1987-0
dialoginput.bolditalic.latin-1=-b&h-lucidatypewriter-bold-i-normal-sans-*-%d-*-*-m-*-iso8859-1
dialoginput.bolditalic.latin-1.motif=-b&h-luxi mono-bold-i-normal--*-%d-*-*-m-*-iso8859-1
# Search Sequences
sequence.allfonts=latin-1
sequence.allfonts.Big5=latin-1,chinese-big5
sequence.allfonts.x-euc-jp-linux=latin-1,japanese-x0208
sequence.allfonts.EUC-KR=latin-1,korean
sequence.allfonts.GB18030=latin-1,chinese-gb18030
sequence.fallback=lucida,chinese-big5,chinese-gb18030,japanese-x0208,korean
# Exclusion Ranges
exclusion.japanese-x0208=0390-03d6,2200-22ef,2701-27be
# Font File Names
filename.-arphic_technology_co.-ar_pl_mingti2l_big5-medium-r-normal--*-%d-*-*-c-*-iso10646-1=/usr/share/fonts/zh_TW/TrueType/bsmi00lp.ttf
filename.-misc-baekmuk_batang-medium-r-normal--*-%d-*-*-c-*-iso10646-1=/usr/share/fonts/ko/TrueType/batang.ttf
filename.-misc-baekmuk_gulim-medium-r-normal--*-%d-*-*-c-*-iso10646-1=/usr/share/fonts/ko/TrueType/gulim.ttf
filename.-misc-kochi_gothic-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0=/usr/share/fonts/ja/TrueType/kochi-gothic-subst.ttf
filename.-misc-kochi_mincho-medium-r-normal--*-%d-*-*-c-*-jisx0208.1983-0=/usr/share/fonts/ja/TrueType/kochi-mincho-subst.ttf
filename.-misc-zysong18030-medium-r-normal--*-%d-*-*-c-*-iso10646-1=/usr/share/fonts/zh_CN/TrueType/zysong.ttf
# AWT X11 font paths
awtfontpath.latin-1=/usr/X11R6/lib/X11/fonts/Type1
awtfontpath.chinese-big5=/usr/share/fonts/zh_TW/TrueType
awtfontpath.chinese-gb18030=/usr/share/fonts/VeraSansYuanTi
awtfontpath.japanese-x0208=/usr/share/fonts/ja/TrueType
awtfontpath.korean=/usr/share/fonts/ko/TrueType
# 中文字体支持部分=====
filename.-misc-vera_sans_yuanti-medium-r-normal--*-%d-*-*-*-*-iso10646-1=/usr/share/fonts/VeraSansYuanTi/VeraSansYuanTi-Regular.ttf
filename.-misc-vera_sans_yuanti-medium-r-normal--*-%d-*-*-*-*-gb2312.1980-0=/usr/share/fonts/VeraSansYuanTi/VeraSansYuanTi-Regular.ttf
filename.-misc-vera_sans_yuanti-medium-r-normal--*-%d-*-*-*-*-gb18030.2000-0=/usr/share/fonts/VeraSansYuanTi/VeraSansYuanTi-Regular.ttf
# =====中文字体支持部分
注：上面中文字体名称和路径换成自己的字体，尤其是gb18030项
卸载
如果你想删除java环境，以下的命令可以完成工作（如果严格按照howto进行）。
~#sudo rm /usr/lib/mozilla-firefox/plugins/libjavaplugin_oji.so ~#sudo rm /usr/bin/java_v m
~# sudo update-alternatives --remove java /usr/lib/jre1.5-sun/bin/ java
指定运行Java
环境变量配置
编辑环境文件 /etc/environment
sudo gedit /etc/environment（最好先备份一下）
并在其中添加
CLASSPATH=.:/usr/lib/jvm/java-1.5.0-sun/lib
JAVA_HOME=/usr/lib/jvm/java-1.5.0-sun
并保存退出
测试配置环境
写个简单的HelloWorld来测试一下
public class HelloWorld{
public static void main(String args[]){
System.out.println("Hello World in Ubuntu!!");
}
}
然后在命令行输入：
javac HelloWorld.java
如没有错误，则接着输入
java HelloWorld
如果shell下输出
Hello World in Ubuntu!!
那么恭喜你，你成功了！:)