newjframe.java

将前缀表达式转为中缀表达式

        jPanel8Layout.setVerticalGroup(
            jPanel8Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 44, Short.MAX_VALUE)
        );

        javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
        jPanel2.setLayout(jPanel2Layout);
        jPanel2Layout.setHorizontalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addComponent(jPanel4, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jPanel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jPanel1, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(jPanel7, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jPanel5, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jPanel8, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addContainerGap())
        );
        jPanel2Layout.setVerticalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel2Layout.createSequentialGroup()
                        .addComponent(jPanel8, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jPanel5, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jPanel7, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                    .addGroup(jPanel2Layout.createSequentialGroup()
                        .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jPanel4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jPanel3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        jMenu5.setText("文件");

        jMenuItem7.setAccelerator(javax.swing.KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_O, java.awt.event.InputEvent.CTRL_MASK));
        jMenuItem7.setText("开始");
        jMenuItem7.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem1ActionPerformed(evt);
            }
        });
        jMenu5.add(jMenuItem7);

        jMenuItem8.setAccelerator(javax.swing.KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_F5, java.awt.event.InputEvent.ALT_MASK));
        jMenuItem8.setText("退出");
        jMenuItem8.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem2ActionPerformed(evt);
            }
        });
        jMenu5.add(jMenuItem8);

        jMenuBar3.add(jMenu5);

        jMenu6.setText("帮助");

        jMenuItem9.setText("关于");
        jMenuItem9.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem9ActionPerformed(evt);
            }
        });
        jMenu6.add(jMenuItem9);

        jMenuBar3.add(jMenu6);

        setJMenuBar(jMenuBar3);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jTextField1ActionPerformed
        // TODO add your handling code here:   
    }//GEN-LAST:event_jTextField1ActionPerformed

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
        // TODO add your handling code here:
        
        int k=0,mark=0,shu=0;
        for(int i=0;i<jTextField1.getText().length();i++){
            if((jTextField1.getText().charAt(i)-'0'>=0&&jTextField1.getText().charAt(i)-'0'<=9)
                    ||(jTextField1.getText().charAt(i)-'a'>=0&&jTextField1.getText().charAt(i)-'z'<=0)
                    ||(jTextField1.getText().charAt(i)-'A'>=0&&jTextField1.getText().charAt(i)-'Z'<=0)){
                shu++;
            }
            else if(jTextField1.getText().charAt(i)=='+'
                    ||jTextField1.getText().charAt(i)=='/'||jTextField1.getText().charAt(i)=='-'
                    ||jTextField1.getText().charAt(i)=='^'||jTextField1.getText().charAt(i)=='*'){
                mark++;
            }
            else {
                javax.swing.JOptionPane.showMessageDialog(null,"数据不合法，请输入前缀表达式","警告",javax.swing.JOptionPane.INFORMATION_MESSAGE,new javax.swing.ImageIcon("images/2.gif"));
                k=1;
                jTextField1.setText("");
                break;
            }
            if(i<jTextField1.getText().length()-1&&shu>mark){
                javax.swing.JOptionPane.showMessageDialog(null,"数据不合法，请输入前缀表达式","警告",javax.swing.JOptionPane.INFORMATION_MESSAGE,new javax.swing.ImageIcon("images/2.gif"));
                k=1;
                jTextField1.setText("");
                break; 
            }
        }
        if(k==0&&shu!=mark+1){
            javax.swing.JOptionPane.showMessageDialog(null,"数据不合法，请输入前缀表达式","警告",javax.swing.JOptionPane.INFORMATION_MESSAGE,new javax.swing.ImageIcon("images/2.gif"));
            k=1;
            jTextField1.setText("");
        } 
        if(k==0){
            jComboBox1.removeAllItems();
            jButton2.setEnabled(false);
            jButton3.setEnabled(false);
            jButton5.setEnabled(false);
            jTextArea1.setText("");
            jTextField4.setText("");
            jButton6.setEnabled(false);
            jTextField5.setText("");
            jTextField6.setText("");
            jTextField5.setEditable(false);
            jPanel6.in="";
            jPanel6.repaint();
            
            jTextField2.setText(NewClass.WriteExpr(NewClass.JReadExpre(jTextField1.getText())));
            for(int i=0;i<NewClass.j;i++){
       
                jComboBox1.addItem(NewClass.b[i]);
                jTextArea1.append(NewClass.b[i]+"="+NewClass.zh[i]+"\n");
            }
            if(NewClass.j>0){
                jTextField3.setEditable(true);
                jButton3.setEnabled(true);
            }
            if(NewClass.j==0&&jTextField1.getText().length()!=0) jButton2.setEnabled(true);
            jButton6.setEnabled(true);
            jTextField5.setEditable(true);
            jButton5.setEnabled(true);
            
            
        }
        
    }//GEN-LAST:event_jButton1ActionPerformed

    private void jTextField2ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jTextField2ActionPerformed
        // TODO add your handling code here:
    }//GEN-LAST:event_jTextField2ActionPerformed

    private void jComboBox1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jComboBox1ActionPerformed
        // TODO add your handling code here:
    }//GEN-LAST:event_jComboBox1ActionPerformed

    private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton3ActionPerformed
        // TODO add your handling code here:
        int k=0,m=0;
        for(int i=0;i<jTextField3.getText().length();i++){
            if((jTextField3.getText().charAt(i)-'0'>=0&&jTextField3.getText().charAt(i)-'0'<=9)
                    ||jTextField3.getText().charAt(i)=='.'||((jTextField3.getText().charAt(i)=='-'||jTextField3.getText().charAt(i)=='+')&&i==0&&jTextField3.getText().length()>1)){}
            else {
                javax.swing.JOptionPane.showMessageDialog(null,"数据不合法，请输入实数","警告",javax.swing.JOptionPane.INFORMATION_MESSAGE,new javax.swing.ImageIcon("images/2.gif"));
                k=1;
                jTextField3.setText("");
                break;
            }
        }
        if(k==0){
           
            
     //       NewClass.WriteExpr(NewClass.JReadExpre(jTextField1.getText()));
            if(jTextField3.getText().length()!=0)
            NewClass.zh[jComboBox1.getSelectedIndex()]=jTextField3.getText();
            jTextArea1.setText("");
            for(int i=0;i<jComboBox1.getItemCount();i++){
                jTextArea1.append(NewClass.b[i]+"="+NewClass.zh[i]+"\n");
            }
            jComboBox1.setSelectedIndex((jComboBox1.getSelectedIndex()+1)%jComboBox1.getItemCount());
            jTextField3.setText("");
            for(int i=0;i<jComboBox1.getItemCount();i++){
            if(NewClass.zh[i]=="未赋值") {
                m++;
                break;
            }
            }
            if(m==0) jButton2.setEnabled(true);
            else jButton2.setEnabled(false);
            jTextField3.setText("");
            jTextField4.setText("");
       }
        
        
    }//GEN-LAST:event_jButton3ActionPerformed

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton2ActionPerformed
        // TODO add your handling code here:
        if(jTextField6.getText().length()==0)
        jTextField4.setText(""+NewClass.Value(NewClass.root));
        else jTextField4.setText(""+NewClass.Value(NewClass.root.left));
    }//GEN-LAST:event_jButton2ActionPerformed

    private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton4ActionPerformed
        // TODO add your handling code here:
        jComboBox1.removeAllItems();
        jButton3.setEnabled(false);
        jButton2.setEnabled(false);
        jButton5.setEnabled(false);
        jTextField3.setEditable(false);
        jTextField4.setText("");
        jTextArea1.setText("");