compile java program with javac

#!/bin/bash # compile java program with javac # usage: #            myjava xxx.java # copyright @ http://scriptdemo.blogspot.com if [ $# -eq 0 ]; then    sed -n '2,4p' myjava    exit else    srcfile=$1    nf=`echo ${srcfile} | awk -F. '{print NF}'`    if [ $nf -eq 1 ]; then       exefilename=${srcfile}       srcfile=${srcfilename}.java    elif [ $nf -eq 2 ]; then       exefilename=`echo ${srcfile} | awk -F. '{print $1}'`    else       myjava       exit    fi    if [ -e ${srcfile} ]; then       javac ${srcfile}       java -classpath . ${exefilename}    elif [ -e ${exefilename} ];then       java -classpath . ${exefilename}    else       echo "${srcfile} can\'t be found in current directory!"       exit    fi fi