java - 单击“结帐”按钮时的总计问题

Question

我正在做一个订购冰淇淋的程序，用户首先应该在圆锥体或杯子之间进行选择(作为按钮)，当他单击按钮时，总数会显示在文本字段中，然后他可以继续选择口味作为复选框，每当他添加额外的 flavor 等时，总数就会添加

问题是当我按下“查看”​​按钮时，它会更改为另一个值，而不是应有的总计

 public void actionPerformed(ActionEvent e){
        String a = e.getActionCommand();
         double ttt;
         if(a.equals("cone")){
                total = (total +7); 
            t1.setText(Double.toString(total));

        } else if(a.equals("cup")){
                total = (total +5); 
            t1.setText(Double.toString(total));

            }
        if(RB3.isSelected()){

        total = total +7; 
            t1.setText(Double.toString(total));

        }
        if(RB2.isSelected()){

                total = (total +7); 
            t1.setText(Double.toString(total));

        }if(RB1.isSelected()){

                total = (total +7); 
            t1.setText(Double.toString(total));

        }if(CB1.isSelected()){

            total = (total +5); 
            t1.setText(Double.toString(total));

        } if(CB2.isSelected()){

            total = (total +5); 
            t1.setText(Double.toString(total));

        } if(CB3.isSelected()){

            total = (total +5); 
            t1.setText(Double.toString(total));

        }if(a.equals("Clear")){
                t1.setText(" ");
                t2.setText("");
                t3.setText("");
                RB1.setSelected(false);
                RB2.setSelected(false);
                RB3.setSelected(false);
                CB1.setSelected(false);
                CB2.setSelected(false);
                CB3.setSelected(false);
                total = 0; 

            }if(a.equals("Apply Code")){

        String c=   t2.getText(); 
            if(c.equals("DISC10")){
                JOptionPane.showMessageDialog(null,"Code applied Successfully");
                ttt=total-total*0.1;
                t3.setText(Double.toString(ttt));

            }
            else if(c.equals("")){
                t3.setText(Double.toString(total));
            }
            }
            if(a.equals("Check Out")){

                t3.setText(Double.toString(total));

即使我应用优惠券代码，总变化

Answer 1

正如我从代码中可以理解的那样，您试图在单个方法中处理不同的步骤，从而计算每个步骤的每个操作。

尝试并根据自己的方法区分步骤

例如:选择冰淇淋类型

void chooseIceCreamType(ActionEvent event) {
        String a = event.getActionCommand();
        if(a.equals("cone")){
            total = (total +7); 
            t1.setText(Double.toString(total));
        } else if(a.equals("cup")){
            total = (total +5); 
            t1.setText(Double.toString(total));
        }
}

用户选择冰淇淋类型并继续选择口味后，计算所选口味

void calculateSelectedFlavors(ActionEvent event) {
    if(RB3.isSelected()){
        total = total +7; 
        t1.setText(Double.toString(total));
    } if(RB2.isSelected()){
        total = (total +7); 
        t1.setText(Double.toString(total));
    } if(RB1.isSelected()){
        total = (total +7); 
        t1.setText(Double.toString(total));
    } if(CB1.isSelected()){
        total = (total +5); 
        t1.setText(Double.toString(total));
    } if(CB2.isSelected()){
        total = (total +5); 
        t1.setText(Double.toString(total));
    } if(CB3.isSelected()){
        total = (total +5); 
        t1.setText(Double.toString(total));
    }
}

并在自己的事件方法上处理清除、应用代码和结账按钮

void handleOnClear(ActionEvent event) {
    t1.setText(" ");
    t2.setText("");
    t3.setText("");
    RB1.setSelected(false);
    RB2.setSelected(false);
    RB3.setSelected(false);
    CB1.setSelected(false);
    CB2.setSelected(false);
    CB3.setSelected(false);
    total = 0; 
}

void handleOnCodeApplied(ActionEvent event) {
    String c=   t2.getText(); 
    if(c.equals("DISC10")){
       JOptionPane.showMessageDialog(null,"Code applied Successfully");
       ttt=total-total*0.1;
       t3.setText(Double.toString(ttt));
    }else if(c.equals("")){
       t3.setText(Double.toString(total));
    }
}

void checkOut(ActionEvent event) {
   t3.setText(Double.toString(total));
   //handle checkout logic
}