rcalculator.java

这个无限位计算器

        calBut6.setMaximumSize(new java.awt.Dimension(78, 25));
        calBut6.setMinimumSize(new java.awt.Dimension(78, 25));
        calBut6.setPreferredSize(new java.awt.Dimension(78, 25));
        calBut6.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                calBut6ActionPerformed(evt);
            }
        });

        magentPanel.add(calBut6);

        calBut3.setFont(new java.awt.Font("Comic Sans MS", 0, 18));
        calBut3.setForeground(new java.awt.Color(204, 0, 204));
        calBut3.setText("3");
        calBut3.setBorder(null);
        calBut3.setBorderPainted(false);
        calBut3.setMaximumSize(new java.awt.Dimension(78, 25));
        calBut3.setMinimumSize(new java.awt.Dimension(78, 25));
        calBut3.setPreferredSize(new java.awt.Dimension(78, 25));
        calBut3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                calBut3ActionPerformed(evt);
            }
        });

        magentPanel.add(calBut3);

        butSquare.setFont(new java.awt.Font("Comic Sans MS", 0, 18));
        butSquare.setForeground(new java.awt.Color(204, 0, 204));
        butSquare.setText("Square");
        butSquare.setBorder(null);
        butSquare.setBorderPainted(false);
        butSquare.setMaximumSize(new java.awt.Dimension(78, 25));
        butSquare.setMinimumSize(new java.awt.Dimension(78, 25));
        butSquare.setPreferredSize(new java.awt.Dimension(78, 25));
        butSquare.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                butSquareActionPerformed(evt);
            }
        });

        magentPanel.add(butSquare);

        butC.setFont(new java.awt.Font("Comic Sans MS", 0, 18));
        butC.setForeground(new java.awt.Color(204, 0, 204));
        butC.setText("C");
        butC.setBorder(null);
        butC.setBorderPainted(false);
        butC.setMaximumSize(new java.awt.Dimension(78, 25));
        butC.setMinimumSize(new java.awt.Dimension(78, 25));
        butC.setPreferredSize(new java.awt.Dimension(78, 25));
        butC.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                butCActionPerformed(evt);
            }
        });

        magentPanel.add(butC);

        yellowUnder.add(magentPanel);

        redPanel.setBackground(new java.awt.Color(255, 51, 255));
        redPanel.setMaximumSize(new java.awt.Dimension(100, 164));
        redPanel.setMinimumSize(new java.awt.Dimension(100, 164));
        redPanel.setName("<Different Values>");
        redPanel.setPreferredSize(new java.awt.Dimension(100, 164));
        butAddition.setFont(new java.awt.Font("Comic Sans MS", 0, 18));
        butAddition.setForeground(new java.awt.Color(204, 0, 204));
        butAddition.setText("+");
        butAddition.setBorder(null);
        butAddition.setBorderPainted(false);
        butAddition.setMaximumSize(new java.awt.Dimension(78, 25));
        butAddition.setMinimumSize(new java.awt.Dimension(78, 25));
        butAddition.setPreferredSize(new java.awt.Dimension(78, 25));
        butAddition.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                butAdditionActionPerformed(evt);
            }
        });

        redPanel.add(butAddition);

        butSubtraction.setFont(new java.awt.Font("Comic Sans MS", 0, 18));
        butSubtraction.setForeground(new java.awt.Color(204, 0, 204));
        butSubtraction.setText("-");
        butSubtraction.setBorder(null);
        butSubtraction.setBorderPainted(false);
        butSubtraction.setMaximumSize(new java.awt.Dimension(78, 25));
        butSubtraction.setMinimumSize(new java.awt.Dimension(78, 25));
        butSubtraction.setPreferredSize(new java.awt.Dimension(78, 25));
        butSubtraction.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                butSubtractionActionPerformed(evt);
            }
        });

        redPanel.add(butSubtraction);

        butMultiplication.setFont(new java.awt.Font("Comic Sans MS", 0, 18));
        butMultiplication.setForeground(new java.awt.Color(204, 0, 204));
        butMultiplication.setText("*");
        butMultiplication.setBorder(null);
        butMultiplication.setBorderPainted(false);
        butMultiplication.setMaximumSize(new java.awt.Dimension(78, 25));
        butMultiplication.setMinimumSize(new java.awt.Dimension(78, 25));
        butMultiplication.setPreferredSize(new java.awt.Dimension(78, 25));
        butMultiplication.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                butMultiplicationActionPerformed(evt);
            }
        });

        redPanel.add(butMultiplication);

        butDivision.setFont(new java.awt.Font("Comic Sans MS", 0, 18));
        butDivision.setForeground(new java.awt.Color(204, 0, 204));
        butDivision.setText("/");
        butDivision.setBorder(null);
        butDivision.setBorderPainted(false);
        butDivision.setMaximumSize(new java.awt.Dimension(78, 25));
        butDivision.setMinimumSize(new java.awt.Dimension(78, 25));
        butDivision.setPreferredSize(new java.awt.Dimension(78, 25));
        butDivision.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                butDivisionActionPerformed(evt);
            }
        });

        redPanel.add(butDivision);

        butEqual.setFont(new java.awt.Font("Comic Sans MS", 0, 18));
        butEqual.setForeground(new java.awt.Color(204, 0, 204));
        butEqual.setText("=");
        butEqual.setBorder(null);
        butEqual.setBorderPainted(false);
        butEqual.setMaximumSize(new java.awt.Dimension(78, 25));
        butEqual.setMinimumSize(new java.awt.Dimension(78, 25));
        butEqual.setPreferredSize(new java.awt.Dimension(78, 25));
        butEqual.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                butEqualActionPerformed(evt);
            }
        });

        redPanel.add(butEqual);

        yellowUnder.add(redPanel);

        getContentPane().add(yellowUnder);
        yellowUnder.setBounds(0, 50, 400, 164);

        pinkAbove.setLayout(new java.awt.FlowLayout(java.awt.FlowLayout.CENTER, 10, 10));

        pinkAbove.setBackground(new java.awt.Color(255, 51, 255));
        pinkAbove.setMaximumSize(new java.awt.Dimension(400, 50));
        pinkAbove.setMinimumSize(new java.awt.Dimension(400, 50));
        pinkAbove.setName("above");
        pinkAbove.setNextFocusableComponent(yellowUnder);
        pinkAbove.setPreferredSize(new java.awt.Dimension(400, 50));
        textDisplay.setBackground(new java.awt.Color(255, 255, 255));
        textDisplay.setEditable(false);
        textDisplay.setFont(new java.awt.Font("Batang", 1, 16));
        textDisplay.setForeground(new java.awt.Color(153, 0, 153));
        textDisplay.setHorizontalAlignment(javax.swing.JTextField.RIGHT);
        textDisplay.setText("0.");
        textDisplay.setMaximumSize(new java.awt.Dimension(380, 30));
        textDisplay.setMinimumSize(new java.awt.Dimension(380, 30));
        textDisplay.setPreferredSize(new java.awt.Dimension(380, 30));
        textDisplay.setSelectionColor(new java.awt.Color(255, 204, 255));
        pinkAbove.add(textDisplay);

        getContentPane().add(pinkAbove);
        pinkAbove.setBounds(0, 0, 400, 50);

        java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
        setBounds((screenSize.width-406)/2, (screenSize.height-252)/2, 406, 252);
    }
    // </editor-fold>//GEN-END:initComponents

    private void butNActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_butNActionPerformed
        try{
        BigDecimal bigs=new BigDecimal(s);
        BigDecimal res=new BigDecimal("1");
        BigDecimal bigOne=new BigDecimal("1");
        BigDecimal bigAdd=new BigDecimal("1");
        while (bigAdd.compareTo(bigs)!=1)
        {
            res=res.multiply(bigAdd);
            bigAdd=bigAdd.add(bigOne);
        }
        preNo=res.toString();
        s=preNo;
        textDisplay.setText(s);
        nextNo="";
         }catch (NumberFormatException e){}
        
    }//GEN-LAST:event_butNActionPerformed

    private void butSquareActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_butSquareActionPerformed
        try{
         BigDecimal bigS=new BigDecimal(s);
         preNo=bigS.multiply(bigS).toString();
         s=preNo;
         textDisplay.setText(s);
         nextNo="";
        }catch (NumberFormatException e){}
    
    }//GEN-LAST:event_butSquareActionPerformed

    private void calHelpActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_calHelpActionPerformed
         if (evt.getSource()==calHelp)
         {
             textDisplay.setText("***Arbitrary Precision Calculator***  ^_^ ");
         }
    }//GEN-LAST:event_calHelpActionPerformed

    private void butEqualActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_butEqualActionPerformed
       nextNo=s;
       markE=true;
       // +
       if (markS==1)
       {
           BigDecimal bigPre=new BigDecimal(preNo);
           BigDecimal bigNext=new BigDecimal(nextNo);
           BigDecimal bigRes=bigPre.add(bigNext);
           preNo=bigRes.toString();
           s=preNo;
           textDisplay.setText(s);
           markE=false;
           markS=0; 
       }
       
       // -
       if (markS==2)
       {
           BigDecimal bigPre=new BigDecimal(preNo);
           BigDecimal bigNext=new BigDecimal(nextNo);
           BigDecimal bigRes=bigPre.subtract(bigNext);
           preNo=bigRes.toString();
           s=preNo;
           textDisplay.setText(s);
           markE=false;
           markS=0; 
       }
       
       // *
       if (markS==3)
       {
           BigDecimal bigPre=new BigDecimal(preNo);
           BigDecimal bigNext=new BigDecimal(nextNo);
           BigDecimal bigRes=bigPre.multiply(bigNext);
           preNo=bigRes.toString();
           s=preNo;
           textDisplay.setText(s);
           markE=false;
           markS=0; 
       }
       
       // /
       if (markS==4)
       {
           BigDecimal bPre=new BigDecimal(preNo);
          // System.out.println(bPre);
           BigDecimal bNext=new BigDecimal(nextNo);
           //System.out.println(bNext);
           try{
           BigDecimal bigRes=bPre.divide(bNext,bPre.scale(),bPre.ROUND_HALF_EVEN);
          
           preNo=bigRes.toString();
           s=preNo;
           textDisplay.setText(s);
           } 
           catch (ArithmeticException e1)
           {
               textDisplay.setText(e1.getMessage());
           }
           catch (IllegalArgumentException e2)
           {