aplet.java

http://w3eval.calcsharp.net/ W3Eval is Java applet that evaluates mathematical expressions. It uses

      jMenuItem2.addActionListener(new java.awt.event.ActionListener()
      {

         public void actionPerformed(ActionEvent e)
         {
            jMenuItem2_actionPerformed(e);
         }
      });
      jMenuItem3.setText("CDE/Motif");
      jMenuItem3.addActionListener(new java.awt.event.ActionListener()
      {

         public void actionPerformed(ActionEvent e)
         {
            jMenuItem3_actionPerformed(e);
         }
      });

      this.getContentPane().add(jPanel1, BorderLayout.CENTER);
      jPanel1.add(jSplitPane1, BorderLayout.CENTER);
      jSplitPane1.add(jScrollPane1, JSplitPane.LEFT);
      jSplitPane1.add(jSplitPane2, JSplitPane.RIGHT);
      jSplitPane2.add(jScrollPane2, JSplitPane.TOP);
      jScrollPane2.getViewport().add(izrazi, null);
      jSplitPane2.add(jScrollPane3, JSplitPane.BOTTOM);
      jScrollPane3.getViewport().add(rezultat, null);
      jScrollPane1.getViewport().add(drvo, null);
      izrazi_popup.add(izrazi_evaluate_popup);
      izrazi_popup.add(izrazi_explain_popup);
      izrazi_popup.add(izrazi_parse_popup);
      izrazi_popup.add(izrazi_normalize_popup);
      izrazi_popup.add(izrazi_reduce_popup);
      izrazi_popup.add(izrazi_select_popup);
      izrazi_popup.add(izrazi_variables_popup);
      izrazi_popup.add(izrazi_clear_popup);
      izrazi_popup.addSeparator();
      izrazi_popup.add(jRadioButtonMenuItem1);
      izrazi_popup.add(jRadioButtonMenuItem2);
      izrazi_popup.add(jRadioButtonMenuItem3);
      izrazi_popup.addSeparator();
      izrazi_popup.add(izrazi_background_popup);
      izrazi_popup.add(izrazi_foreground_popup);
      izrazi_popup.add(jMenu1);
      izrazi_popup.addSeparator();
      // izrazi_popup.add(izrazi_help_popup);
      izrazi_popup.add(izrazi_about_popup);
      rezultat_popup.add(rezultat_background_popup);
      rezultat_popup.add(rezultat_foreground_popup);
      drvo_popup.add(drvo_expand_popup);
      drvo_popup.add(drvo_expand_selection_popup);
      drvo_popup.addSeparator();
      drvo_popup.add(drvo_collapse_popup);
      drvo_popup.add(drvo_collapse_selection_popup);
      jSplitPane1.setDividerLocation(200);
      jSplitPane2.setDividerLocation(150);

      izrazi_explain_popup.setAccelerator( KeyStroke.getKeyStroke(
         KeyEvent.VK_ENTER, ActionEvent.CTRL_MASK ));
      izrazi_normalize_popup.setAccelerator( KeyStroke.getKeyStroke(
         KeyEvent.VK_N, ActionEvent.CTRL_MASK ));
      izrazi_parse_popup.setAccelerator( KeyStroke.getKeyStroke(
         KeyEvent.VK_P, ActionEvent.CTRL_MASK ));
      izrazi_evaluate_popup.setAccelerator( KeyStroke.getKeyStroke(
         KeyEvent.VK_E, ActionEvent.CTRL_MASK ));
      izrazi_reduce_popup.setAccelerator( KeyStroke.getKeyStroke(
         KeyEvent.VK_R, ActionEvent.CTRL_MASK ));
      izrazi_select_popup.setAccelerator( KeyStroke.getKeyStroke(
         KeyEvent.VK_S, ActionEvent.CTRL_MASK ));
      izrazi_variables_popup.setAccelerator( KeyStroke.getKeyStroke(
         KeyEvent.VK_D, ActionEvent.CTRL_MASK ));
      izrazi_clear_popup.setAccelerator( KeyStroke.getKeyStroke(
         KeyEvent.VK_L, ActionEvent.CTRL_MASK ));

   buttonGroup1.add(jRadioButtonMenuItem1);
   buttonGroup1.add(jRadioButtonMenuItem2);
   buttonGroup1.add(jRadioButtonMenuItem3);
      jMenu1.add(jMenuItem1);
      jMenu1.add(jMenuItem2);
      jMenu1.add(jMenuItem3);

   // jRadioButtonMenuItem1.setMnemonic( KeyEvent.VK_D );
   // jRadioButtonMenuItem2.setMnemonic( KeyEvent.VK_R );
   // jRadioButtonMenuItem3.setMnemonic( KeyEvent.VK_G );

   }

   public void popunjavanje_drva( DefaultMutableTreeNode korijen )
      {
      DefaultMutableTreeNode operatori = null;
      DefaultMutableTreeNode varijable = null;
      DefaultMutableTreeNode funkcije = null;

      operatori = new DefaultMutableTreeNode( "Operators");
      korijen.add( operatori );

      varijable = new DefaultMutableTreeNode( "Variables");
      korijen.add( varijable );

      funkcije = new DefaultMutableTreeNode( "Functions");
      korijen.add( funkcije );

      punjenje_operatora( operatori );
      punjenje_varijabli( varijable );
      punjenje_funkcija( funkcije );
      }

   public void punjenje_varijabli( DefaultMutableTreeNode v )
      {
      // punjenje stabla
      DefaultMutableTreeNode mathematical=null;
      DefaultMutableTreeNode physical=null;
      DefaultMutableTreeNode informatic=null;

      mathematical = new DefaultMutableTreeNode( "Mathematical" );
      physical = new DefaultMutableTreeNode( "Physical" );
      informatic = new DefaultMutableTreeNode( "Informatic" );
      user_defined = new DefaultMutableTreeNode( "User-defined" );

      v.add( mathematical );
      v.add( physical );
      v.add( informatic );
      v.add( user_defined );

      // Physical
      physical.add( new DefaultMutableTreeNode( "ATOMIC_MASS" ) );
      physical.add( new DefaultMutableTreeNode( "AVOGADRO" ) );
      physical.add( new DefaultMutableTreeNode( "BOLTZMANN" ) );
      physical.add( new DefaultMutableTreeNode( "CONDUCTANCE_QUANTUM" ) );
      physical.add( new DefaultMutableTreeNode( "ELECTRIC_CONSTANT" ) );
      physical.add( new DefaultMutableTreeNode( "ELECTRON_MASS" ) );
      physical.add( new DefaultMutableTreeNode( "ELECTRON_VOLT" ) );
      physical.add( new DefaultMutableTreeNode( "ELEMENTARY_CHARGE" ) );
      physical.add( new DefaultMutableTreeNode( "FARADAY" ) );
      physical.add( new DefaultMutableTreeNode( "FINE_STRUCTURE" ) );
      physical.add( new DefaultMutableTreeNode( "GRAVITY" ) );
      physical.add( new DefaultMutableTreeNode( "INVERSE_FINE_STRUCTURE" ) );
      physical.add( new DefaultMutableTreeNode( "MAGNETIC" ) );
      physical.add( new DefaultMutableTreeNode( "MAGNETIC_FLUX" ) );
      physical.add( new DefaultMutableTreeNode( "MOLAR_GAS" ) );
      physical.add( new DefaultMutableTreeNode( "NEWTON" ) );
      physical.add( new DefaultMutableTreeNode( "PLANCK" ) );
      physical.add( new DefaultMutableTreeNode( "PROTON_MASS" ) );
      physical.add( new DefaultMutableTreeNode( "PROTON_ELECTRON_MASS_RATIO" ) );
      physical.add( new DefaultMutableTreeNode( "RYDBERG" ) );
      physical.add( new DefaultMutableTreeNode( "SPEED_OF_LIGHT" ) );
      physical.add( new DefaultMutableTreeNode( "STEFAN_BOLTZMANN" ) );

      mathematical.add( new DefaultMutableTreeNode( "APERY" ) );
      mathematical.add( new DefaultMutableTreeNode( "CATALAN" ) );
      // mathematical.add( new DefaultMutableTreeNode( "CHAITIN" ) );
      mathematical.add( new DefaultMutableTreeNode( "E" ) );
      mathematical.add( new DefaultMutableTreeNode( "EULER" ) );
      mathematical.add( new DefaultMutableTreeNode( "FEIGENBAUM" ) );
      // mathematical.add( new DefaultMutableTreeNode( "GOLDEN_MEAN" ) );
      mathematical.add( new DefaultMutableTreeNode( "IMAGINARY_UNIT" ) );
      mathematical.add( new DefaultMutableTreeNode( "KHINTCHINE" ) );
      mathematical.add( new DefaultMutableTreeNode( "MADELUNG" ) );
      mathematical.add( new DefaultMutableTreeNode( "PI" ) );
      mathematical.add( new DefaultMutableTreeNode( "PYTHAGORAS" ) );

      informatic.add( new DefaultMutableTreeNode( "MIN_INT" ) );
      informatic.add( new DefaultMutableTreeNode( "MAX_INT" ) );
      informatic.add( new DefaultMutableTreeNode( "MIN_DEC" ) );
      informatic.add( new DefaultMutableTreeNode( "MAX_DEC" ) );

      informatic.add( new DefaultMutableTreeNode( "TB" ) );
      informatic.add( new DefaultMutableTreeNode( "GB" ) );
      informatic.add( new DefaultMutableTreeNode( "MB" ) );
      informatic.add( new DefaultMutableTreeNode( "KB" ) );

      // punjenje vektora
      varijable.addElement( new Varijabla( "TB", 1099511627776L ) );
      varijable.addElement( new Varijabla( "STEFAN_BOLTZMANN", 5.6704E-8 ) );
      varijable.addElement( new Varijabla( "SPEED_OF_LIGHT", 299792458 ) );
      varijable.addElement( new Varijabla( "RYDBERG", 10973731.568549 ) );
      varijable.addElement( new Varijabla( "PYTHAGORAS", Math.sqrt(2) ) );
      varijable.addElement( new Varijabla( "PROTON_MASS", 1.67262158E-27 ) );
      varijable.addElement( new Varijabla( "PROTON_ELECTRON_MASS_RATIO", 1836.1526675 ) );
      varijable.addElement( new Varijabla( "PLANCK", 6.62606876E-34 ) );
      varijable.addElement( new Varijabla( "PI", Math.PI ) );
      varijable.addElement( new Varijabla( "NEWTON", 6.673E-11 ) );
      varijable.addElement( new Varijabla( "MOLAR_GAS", 8.314472 ) );
      varijable.addElement( new Varijabla( "MIN_INT", Integer.MIN_VALUE ) );
      varijable.addElement( new Varijabla( "MIN_DEC", -Double.MAX_VALUE ) );
      varijable.addElement( new Varijabla( "MB", 1048576 ) );
      varijable.addElement( new Varijabla( "MAX_INT", Integer.MAX_VALUE ) );
      varijable.addElement( new Varijabla( "MAX_DEC", Double.MAX_VALUE ) );
      varijable.addElement( new Varijabla( "MAGNETIC_FLUX", 2.067833636E-15 ) );
      varijable.addElement( new Varijabla( "MAGNETIC", 4E-7 * Math.PI ) );
      varijable.addElement( new Varijabla( "MADELUNG", 2.0531987328 ) );
      varijable.addElement( new Varijabla( "KHINTCHINE", 2.685452001 ) );
      varijable.addElement( new Varijabla( "KB", 1024 ) );
      varijable.addElement( new Varijabla( "INVERSE_FINE_STRUCTURE", 137.03599976 ) );
      varijable.addElement( new Varijabla( "IMAGINARY_UNIT", Math.sqrt(-1) ) );
      varijable.addElement( new Varijabla( "GRAVITY", 9.80665 ) );
      varijable.addElement( new Varijabla( "GB", 1073741824 ) );
      varijable.addElement( new Varijabla( "FINE_STRUCTURE", 7.297352533E-3 ) );
      varijable.addElement( new Varijabla( "FEIGENBAUM", 2.50290787509589282228390287272909 ) );
      varijable.addElement( new Varijabla( "FARADAY", 96485.3415 ) );
      varijable.addElement( new Varijabla( "EULER", 0.57721566490153286060651209008240243104215933593992 ) );
      varijable.addElement( new Varijabla( "ELEMENTARY_CHARGE", 1.602176462E-19 ) );
      varijable.addElement( new Varijabla( "ELECTRON_VOLT", 1.602176462E-19 ) );
      varijable.addElement( new Varijabla( "ELECTRON_MASS", 9.10938188E-31 ) );
      varijable.addElement( new Varijabla( "ELECTRIC_CONSTANT", 8.854187817E-12 ) );
      varijable.addElement( new Varijabla( "E", Math.E ) );
      varijable.addElement( new Varijabla( "CONDUCTANCE_QUANTUM", 7.748091696E-5 ) );
      varijable.addElement( new Varijabla( "CATALAN", 0.915965594 ) );
      varijable.addElement( new Varijabla( "BOLTZMANN", 1.3806503E-23 ) );
      varijable.addElement( new Varijabla( "AVOGADRO", 6.02214199E+23 ) );
      varijable.addElement( new Varijabla( "ATOMIC_MASS", 1.66053873E-27 ) );
      varijable.addElement( new Varijabla( "APERY", 1.20205690315959428539973816151144999076498629234049 ) );
      }

   public void punjenje_funkcija( DefaultMutableTreeNode f )
      {
      // punjenje stabla
      DefaultMutableTreeNode trigonometric=null;
      DefaultMutableTreeNode inverse_trigonometric=null;
      DefaultMutableTreeNode hyperbolic=null;
      DefaultMutableTreeNode inverse_hyperbolic=null;
      DefaultMutableTreeNode exponential=null;
      DefaultMutableTreeNode combinatoric=null;
      DefaultMutableTreeNode statistical=null;
      DefaultMutableTreeNode other=null;
      DefaultMutableTreeNode all=null;

      trigonometric = new DefaultMutableTreeNode( "Trigonometric" );
      inverse_trigonometric = new DefaultMutableTreeNode( "Inverse trigonometric" );
      hyperbolic = new DefaultMutableTreeNode( "Hyperbolic" );
      inverse_hyperbolic = new DefaultMutableTreeNode( "Inverse hyperbolic" );
      exponential = new DefaultMutableTreeNode( "Exponential" );
      combinatoric = new DefaultMutableTreeNode( "Combinatoric" );
      statistical = new DefaultMutableTreeNode( "Statistical" );
      other = new DefaultMutableTreeNode( "Other" );
      all = new DefaultMutableTreeNode( "All" );

      f.add( trigonometric );
      f.add( inverse_trigonometric );
      f.add( hyperbolic );
      f.add( inverse_hyperbolic );
      f.add( exponential );
      f.add( combinatoric );
      f.add( statistical );
      f.add( other );
      f.add( all );

      trigonometric.add( new DefaultMutableTreeNode( "sin(x)" ) );
      trigonometric.add( new DefaultMutableTreeNode( "cos(x)" ) );
      trigonometric.add( new DefaultMutableTreeNode( "tan(x)" ) );
      trigonometric.add( new DefaultMutableTreeNode( "cot(x)" ) );
      trigonometric.add( new DefaultMutableTreeNode( "sec(x)" ) );
      trigonometric.add( new DefaultMutableTreeNode( "csc(x)" ) );

      inverse_trigonometric.add( new DefaultMutableTreeNode( "asin(x)" ) );
      inverse_trigonometric.add( new DefaultMutableTreeNode( "acos(x)" ) );
      inverse_trigonometric.add( new DefaultMutableTreeNode( "atan(x)" ) );
      inverse_trigonometric.add( new DefaultMutableTreeNode( "atan2(x,y)" ) );
      inverse_trigonometric.add( new DefaultMutableTreeNode( "acot(x)" ) );
      inverse_trigonometric.add( new DefaultMutableTreeNode( "asec(x)" ) );
      inverse_trigonometric.add( new DefaultMutableTreeNode( "acsc(x)" ) );

      hyperbolic.add( new DefaultMutableTreeNode( "sinh(x)" ) );
      hyperbolic.add( new DefaultMutableTreeNode( "cosh(x)" ) );
      hyperbolic.add( new DefaultMutableTreeNode( "tanh(x)" ) );
      hyperbolic.add( new DefaultMutableTreeNode( "coth(x)" ) );
      hyperbolic.add( new DefaultMutableTreeNode( "sech(x)" ) );
      hyperbolic.add( new DefaultMutableTreeNode( "csch(x)" ) );

      inverse_hyperbolic.add( new DefaultMutableTreeNode( "asinh(x)" ) );
      inverse_hyperbolic.add( new DefaultMutableTreeNode( "acosh(x)" ) );
      inverse_hyperbolic.add( new DefaultMutableTreeNode( "atanh(x)" ) );
      inverse_hyperbolic.add( new DefaultMutableTreeNode( "acoth(x)" ) );
      inverse_hyperbolic.add( new DefaultMutableTreeNode( "asech(x)" ) );
      inverse_hyperbolic.add( new DefaultMutableTreeNode( "acsch(x)" ) );

      exponential.add( new DefaultMutableTreeNode( "log(x)" ) );
      exponential.add( new DefaultMutableTreeNode( "log2(x)" ) );
      exponential.add( new DefaultMutableTreeNode( "log10(x)" ) );
      exponential.add( new DefaultMutableTreeNode( "exp(x)" ) );
      exponential.add( new DefaultMutableTreeNode( "exp2(x)" ) );
      exponential.add( new DefaultMutableTreeNode( "exp10(x)" ) );
      exponential.add( new DefaultMutableTreeNode( "sqrt(x)" ) );
      exponential.add( new DefaultMutableTreeNode( "cur(x)" ) );

      combinatoric.add( new DefaultMutableTreeNode( "comb(n,r)" ) );
      combinatoric.add( new DefaultMutableTreeNode( "combr(n,r)" ) );
      combinatoric.add( new DefaultMutableTreeNode( "perm(n)" ) );
      combinatoric.add( new DefaultMutableTreeNode( "permr(n,r)" ) );
      combinatoric.add( new DefaultMutableTreeNode( "var(n,r)" ) );
      combinatoric.add( new DefaultMutableTreeNode( "varr(n,r)" ) );

      statistical.add( new DefaultMutableTreeNode( "sum(...)" ) );
      statistical.add( new DefaultMutableTreeNode( "avg(...)" ) );
      statistical.add( new DefaultMutableTreeNode( "min(...)" ) );
      statistical.add( new DefaultMutableTreeNode( "max(...)" ) );
      statistical.add( new DefaultMutableTreeNode( "stddev(...)" ) );
      statistical.add( new DefaultMutableTreeNode( "count(...)" ) );

      other.add( new DefaultMutableTreeNode( "abs(x)" ) );
      other.add( new DefaultMutableTreeNode( "ceil(x)" ) );
      other.add( new DefaultMutableTreeNode( "deg(x)" ) );
      other.add( new DefaultMutableTreeNode( "fact(x)" ) );
      other.add( new DefaultMutableTreeNode( "floor(x)" ) );
      other.add( new DefaultMutableTreeNode( "frac(x)" ) );
      other.add( new DefaultMutableTreeNode( "hypot(x,y)" ) );
      other.add( new DefaultMutableTreeNode( "pow(x,y)" ) );
      other.add( new DefaultMutableTreeNode( "rad(x)" ) );
      other.add( new DefaultMutableTreeNode( "random(x)" ) );
      other.add( new DefaultMutableTreeNode( "round(x, y)" ) );
      other.add( new DefaultMutableTreeNode( "sign(x)" ) );
      other.add( new DefaultMutableTreeNode( "trunc(x, y)" ) );

      // other.add( new DefaultMutableTreeNode( "pol(x)" ) );
      // other.add( new DefaultMutableTreeNode( "rec(x)" ) );
      // other.add( new DefaultMutableTreeNode( "gcd(x)" ) );
      // other.add( new DefaultMutableTreeNode( "degr(x,y,z)" ) );

      funkcije.addElement( new Funkcija("varr", 2) );
      funkcije.addElement( new Funkcija("var", 2) );
      funkcije.addElement( new Funkcija("trunc", 2) );
      funkcije.addElement( new Funkcija("tanh", 1) );
      funkcije.addElement( new Funkcija("tan", 1) );
      funkcije.addElement( new Funkcija("sum", 0) );
      funkcije.addElement( new Funkcija("stddev", 0) );
      funkcije.addElement( new Funkcija("sqrt", 1) );
      funkcije.addElement( new Funkcija("sinh", 1) );
      funkcije.addElement( new Funkcija("sin", 1) );
      funkcije.addElement( new Funkcija("sign", 1) );
      funkcije.addElement( new Funkcija("sech", 1) );
      funkcije.addElement( new Funkcija("sec", 1) );
      funkcije.addElement( new Funkcija("round", 2) );
      funkcije.addElement( new Funkcija("random", 1) );
      funkcije.addElement( new Funkcija("rad", 1) );
      funkcije.addElement( new Funkcija("pow", 2) );
      funkcije.addElement( new Funkcija("permr", 2) );
      funkcije.addElement( new Funkcija("perm", 1) );
      funkcije.addElement( new Funkcija("min", 0) );
      funkcije.addElement( new Funkcija("max", 0) );
      funkcije.addElement( new Funkcija("log2", 1) );
      funkcije.addElement( new Funkcija("log10", 1) );
      funkcije.addElement( new Funkcija("log", 1) );