Question

我正在做一个个人任务，用户输入生日，然后显示用户的占星符号和符号说明。但是由于所有的占星术迹象都是几个月，所以我将if语句分为多个if语句，例如每个月一个

if (birthMonth == 5 && (21<=birthDay && birthDay <=31)) {
        JFrame frame = new JFrame();
        String symbol = "Your sign is Gemini. You are cerebral, chatty, love learning and education, charming, and adventurous.   ";
        symbol += bday;
        JLabel label = new JLabel(symbol, new ImageIcon("gemini.jpg"), JLabel.CENTER);
        label.setVerticalTextPosition(SwingConstants.TOP);
        frame.add(label);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
    else if (birthMonth == 6 && (1<=birthDay && birthDay <=21)) {
        JFrame frame = new JFrame();
        String symbol = "Your sign is Gemini. You are cerebral, chatty, love learning and education, charming, and adventurous.   ";
        symbol += bday;
        JLabel label = new JLabel(symbol, new ImageIcon("gemini.jpg"), JLabel.CENTER);
        label.setVerticalTextPosition(SwingConstants.TOP);
        frame.add(label);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

我想知道是否有一种方法可以组合if语句，同时使代码保持当前状态。提前非常感谢！

Answer 1

逻辑和行为都是相同的，因此您不必使用两个条件来编写逻辑，就可以将下面的代码作为一种方式使用。

if (birthMonth == 5 && (21<=birthDay && birthDay <=31) || birthMonth == 6 && (1<=birthDay && birthDay <=21)) {
        JFrame frame = new JFrame();
        String symbol = "Your sign is Gemini. You are cerebral, chatty, love learning and education, charming, and adventurous.   ";
        symbol += bday;
        JLabel label = new JLabel(symbol, new ImageIcon("gemini.jpg"), JLabel.CENTER);
        label.setVerticalTextPosition(SwingConstants.TOP);
        frame.add(label);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

Answer 2

为什么不使用or运算符|| ？像这样：

(birthMonth == 5 && (21<=birthDay && birthDay <=31) || (birthMonth == 6 & (1<=birthDay && birthDay <=21)))

有没有办法组合这两个if语句？

2 个答案: