有没有办法将这两个 if 语句结合起来？

Question

我正在处理一个个人任务，用户输入他们的生日，然后它会显示用户的星座和星座描述。但是由于所有的星座都是多个月，所以我将 if 语句拆分为多个 if 语句，每个月一个，例如

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，同时保持代码按当前方式工作。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您的逻辑，您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)))

有没有办法将这两个 if 语句结合起来？

Is there a way to combine these two if statements?

java

if-statement

jframe