Generate KeyStore and signed applet

in command line:

keytool -genkey -keystore myKeystore -alias myself 
//建立你的public key 
 
keytool -selfcert -alias myself -keystore myKeystore 
//由你的pubilc key 建立一個 private key 
 
jarsigner -keystore myKeystore test.jar myself 
//將你的jar檔用你的private key來簽章