java - 将 If-Then-Else 语句转换为 If-Then 语句

Question

有谁知道如何将 if-then-else 语句转换为 if-then 语句？这太令人困惑了。 else 部分放在哪里并确保结构与 if-then-else 语句相同？感谢您的帮助。

if ((symptom1.equalsIgnoreCase("Yes"))) //fever 3 to 14 days
            {
                weight = 0.75; //cf

                if ((symptom2.equalsIgnoreCase("Yes"))) //rash on any part of the body
                {
                    weight = 0.55; //cf

                    if ((symptom3.equalsIgnoreCase("Yes"))) //muscle pain
                    {
                        weight = 0.45; //cf


                        if ((symptom4.equalsIgnoreCase("Yes"))) //low blood pressure
                        {
                            weight = 0.38; //cf

                            if ((symptom5.equalsIgnoreCase("Yes"))) //bleeding gum
                            {
                                weight = 0.48; //cf

                                if ((symptom6.equalsIgnoreCase("Yes"))) //bloody feces
                                {
                                    weight = 0.35; //cf

                                    //severe
                                    newWeight = 0.7 * 0.35; //cf for disease = 0.7 [min=0.35]

                                    String cf = Double.toString(newWeight);

                                    Intent intent = new Intent(resultDengue1.this, resultSevereDengue.class);
                                    intent.putExtra("cfDisease", cf);
                                    startActivity(intent);
                                }
                                else //consult doctor
                                {
                                    weight = 0.3; //cf min
                                    newWeight = 0 * 0.3; //cf for disease = 0

                                    String cf = Double.toString(newWeight);

                                    Intent intent = new Intent(resultDengue1.this, consultDoctor.class);
                                    intent.putExtra("cfDisease", cf);
                                    startActivity(intent);
                                }
                            }
                            //consultDoctor
                            else
                            {
                                weight = 0.3; //cf min
                                newWeight = 0 * 0.3; //cf for disease = 0

                                String cf = Double.toString(newWeight);

                                Intent intent = new Intent(resultDengue1.this, consultDoctor.class);
                                intent.putExtra("cfDisease", cf);
                                startActivity(intent);
                            }
                        }
                        //uncomplicated
                        else
                        {
                            newWeight = 0.6 * 0.3; //cf for disease = 0.6 [min=0.3]

                            String cf = Double.toString(newWeight);

                            Intent intent = new Intent(resultDengue1.this, resultUncomplicatedDengue.class);
                            intent.putExtra("cfDisease", cf);
                            startActivity(intent);
                        }
                    }
                    //consultDoctor
                    else
                    {
                        weight = 0.3; //cf min
                        newWeight = 0 * 0.3; //cf for disease = 0

                        String cf = Double.toString(newWeight);

                        Intent intent = new Intent(resultDengue1.this, consultDoctor.class);
                        intent.putExtra("cfDisease", cf);
                        startActivity(intent);
                    }
                }
                //consultDoctor
                else
                {
                    weight = 0.3; //cf min
                    newWeight = 0 * 0.3; //cf for disease = 0

                    String cf = Double.toString(newWeight);

                    Intent intent = new Intent(resultDengue1.this, consultDoctor.class);
                    intent.putExtra("cfDisease", cf);
                    startActivity(intent);
                }
            }
            //absent dengue
            else if ((symptom1.equalsIgnoreCase("No"))) //fever 1 to 3 days
            {
                weight = 0.7; //cf

                if ((symptom2.equalsIgnoreCase("No"))) //rash on any part of the body
                {
                    weight = 0.5; //cf

                    if ((symptom3.equalsIgnoreCase("No"))) //muscle pain
                    {
                        weight = 0.4; //cf

                        if ((symptom4.equalsIgnoreCase("No"))) //low blood pressure
                        {
                            weight = 0.3; //cf

                            if ((symptom5.equalsIgnoreCase("No"))) //bleeding gum
                            {
                                weight = 0.4; //cf

                                if ((symptom6.equalsIgnoreCase("No"))) //bloody feces
                                {
                                    weight = 0.35; //cf

                                    //absent
                                    newWeight = 0.8 * 0.3; //cf for disease = 0.8 [min=0.3]

                                    String cf = Double.toString(newWeight);

                                    Intent intent = new Intent(resultDengue1.this, resultAbsentDengue.class);
                                    intent.putExtra("cfDisease", cf);
                                    startActivity(intent);
                                }
                                else //consultDoctor
                                {
                                    weight = 0.3; //cf min
                                    newWeight = 0 * 0.3; //cf for disease = 0

                                    String cf = Double.toString(newWeight);

                                    Intent intent = new Intent(resultDengue1.this, consultDoctor.class);
                                    intent.putExtra("cfDisease", cf);
                                    startActivity(intent);
                                }
                            }
                            else //consultDoctor
                            {
                                weight = 0.3; //cf min
                                newWeight = 0 * 0.3; //cf for disease = 0

                                String cf = Double.toString(newWeight);

                                Intent intent = new Intent(resultDengue1.this, consultDoctor.class);
                                intent.putExtra("cfDisease", cf);
                                startActivity(intent);
                            }
                        }
                        else //consultDoctor
                        {
                            weight = 0.3; //cf min
                            newWeight = 0 * 0.3; //cf for disease = 0

                            String cf = Double.toString(newWeight);

                            Intent intent = new Intent(resultDengue1.this, consultDoctor.class);
                            intent.putExtra("cfDisease", cf);
                            startActivity(intent);
                        }
                    }
                    else //consultDoctor
                    {
                        weight = 0.3; //cf min
                        newWeight = 0 * 0.3; //cf for disease = 0

                        String cf = Double.toString(newWeight);

                        Intent intent = new Intent(resultDengue1.this, consultDoctor.class);
                        intent.putExtra("cfDisease", cf);
                        startActivity(intent);
                    }
                }
                //consultDoctor
                else
                {
                    weight = 0.3; //cf min
                    newWeight = 0 * 0.3; //cf for disease = 0

                    String cf = Double.toString(newWeight);

                    Intent intent = new Intent(resultDengue1.this, consultDoctor.class);
                    intent.putExtra("cfDisease", cf);
                    startActivity(intent);
                }
            }

Answer 1

我假设symptomN的值必须是"is"或“否”。

static boolean check(String[] symptoms, String... values) {
    if (values.length != symptoms.length) {
        throw new IllegalArgumentException();
    }
    for (int i = 0; i < symptoms.length; ++i) {
        if (!symptoms[i].equalsIgnoreCase(values[i])) {
            return false;
        }
    }
    return true;
}

和

    String[] symptoms = { symptom1, symptom2, symptom3, symptom4, symptom5, symptom6 };

    if (check(symptoms, "Yes", "Yes", "Yes", "Yes", "Yes", "Yes")) {
        weight = 0.35; //cf

        //severe
        newWeight = 0.7 * 0.35; //cf for disease = 0.7 [min=0.35]

        String cf = Double.toString(newWeight);

        Intent intent = new Intent(resultDengue1.this, resultSevereDengue.class);
        intent.putExtra("cfDisease", cf);
        startActivity(intent);
    }
    if (check(symptoms, "Yes", "Yes", "Yes", "Yes", "Yes", "No")) {
        weight = 0.3; //cf min
        newWeight = 0 * 0.3; //cf for disease = 0

        String cf = Double.toString(newWeight);

        Intent intent = new Intent(resultDengue1.this, consultDoctor.class);
        intent.putExtra("cfDisease", cf);
        startActivity(intent);
    }
    if (check(symptoms, "Yes", "Yes", "Yes", "Yes", "No", "Yes")) {
        // ...