mail client source code into pop3, smtp, etc. but need some java-Compiler Compiler-class document

Packet : 15883839sunjars.zip filelist
jdk1.3.1/jre/lib/ext/activation.jar
jdk1.3.1/jre/lib/ext/imap.jar
jdk1.3.1/jre/lib/ext/mail.jar
jdk1.3.1/jre/lib/ext/mailapi.jar
jdk1.3.1/jre/lib/ext/pop3.jar
jdk1.3.1/jre/lib/ext/smtp.jar

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