Basic HTML version of Foils prepared Sept 21 1998

Foil 44 Table for Java file and network access

From Java Tutorial 98- 4: Multi-Treading, Useful Java Classes, I/O and Networking NAVO Tutorial -- Sept 23 1998. by Geoffrey C. Fox, Nancy McCracken
This table shows what Java programs can do in the following four cases:
  • NL - Netscape loading a URL for applet
  • NF - Netscape loading a local file for applet
  • AV - Applet viewer
  • JA - Java application (not an applet
NL NF AV JA
read local file no no yes yes
write local file no no yes yes
get file information no no yes yes
delete file no no no yes
run another program no no yes yes
read the user.name proper no yes yes yes
connect to network port on server yes yes yes yes
connect to network port on other host no yes yes yes
load Java library no yes yes yes
call exit no no yes yes
create a pop-up window with warning yes yes yes yes

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