The output from the debuggee is typically displayed in the "Output" panel. If JSwat connected to a remote debuggee then the output of the debuggee is displayed in the console that started the debuggee.
The "Output" panel is limited to a maximum number of lines. This value is set in the preferences dialog, accessible from the "Options" menu.
The "Input" field below the "Output" panel
is for sending keyboard input to the debuggee on the
System.in
input stream. This is only useful for
console-based applications and would probably not be used if the
debuggee utilizes a graphical interface.