自动编译java的小脚本

编译本目录下得一个java文件的脚本

#!/bin/bash
#

function usage()
{
echo "parameter error "
echo "$0 file"
echo "file is the java source code you want to compile and run"
exit 1;
}

postfix=`echo "$1" | awk -F . '{print $2}'`


# if the parameter is not enough
# or not in the form of "*.java"
# then show the usage
if [ $# != 1 -o "$postfix" != "java" ]
then
usage
fi

cur_dir=`pwd`
file_name=$1
a=${file_name%.*}
javac $file_name -d $cur_dir

if [ "$?"=="0" ]
then
java $a
else
echo "compile failed!"
fi