doc: Re-organize and improve Java Interface documentation. * doc/interpreter/java.txi: Add usejava, isjava functions, debug_java, java_matrix_autoconversion, java_unsigned_autoconversion to docs. Re-organize to put functions in logical order. Add new "Dialog Box Functions" node. * doc/interpreter/system.txi: Remove usejava from list of system functions. * libinterp/octave-value/ov-java.cc(FjavaObject, FjavaMethod, Fjava_unsigned_autoconversion): Improve docstrings. * scripts/java/javaArray.m: Tweak docstring. * scripts/java/listdlg.m: Wrap long lines in docstring. Improve code example in docstring.

clear;

disp('2nd problem');
s=1;
c=[-1,-1]';
a=[-2,5;2,-2];
b=[5;1];
ctype=['U','U']';
lb=[0;0]; ub=[];
vartype=['I';'I'];
param.msglev=1;
[xmin,fmin,status,extra]=glpk(c,a,b,lb,ub,ctype,vartype,s,param)
[xmin,fmin,status,extra]=glpkmex(s,c,a,b,ctype,lb,ub,vartype,param)
pause;

disp('3rd problem');
s=1;
c=[0 0 0 -1 -1]';
a=[-2 0 0 1 0;...
    0 1 0 0 2;...
    0 0 1 3 2];
b=[4 12 18]';
ctype=['S','S','S']';
lb=[0,0,0,0,0]'; ub=[];
vartype=['C','C','C','C','C']';
[xmin,fmin,status,extra]=glpk(c,a,b,lb,ub,ctype,vartype,s)
[xmin,fmin,status,extra]=glpkmex(s,c,a,b,ctype,lb,ub,vartype)