Windows 下个jdk包，安装， JAVA_HOME=C:\java PATH=C:\java\bin CLASSPATH=.;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar Linux wget 192.168.1.101/jdk-6u11-linux-i586.bin mv jdk-6u11-linux-i586.bin /usr/local/src/ cd /usr/local/src/ ./jdk-6u11-linux-i586.bin mkdir ../java mv jdk1.6.0_11/* ../java/ vim /home/myz/.bashrc export JAVA_HOME=/usr/local/java export PATH=$JAVA_HOME/bin:$PATH export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar Test // HelloWorld.java import java.util.*; public class HelloWorld{ public static void main(String[] args){ System.out.println("Hello World"); System.out.println(new Date()); } } javac HelloWorld.java java Helloworld