声明Patient类表示在门诊室中的病人，此类对象也应包括：name（a string）、sex（a char）、age（an integer）、weight(a float)、allergies(a boolean)等属性，以及属性对应的getter/setter方法。在一个单独的类中，声明测试方法，并生成两个patient对象，设置其状态并将其信息显示在屏幕上。声明并测试toString方法显示一个病人的age、sex、name及allergies属

下面是声明和实现Patient类的代码：

public class Patient {
    private String name;
    private char sex;
    private int age;
    private float weight;
    private boolean allergies;

    public Patient(String name, char sex, int age, float weight, boolean allergies) {
        this.name = name;
        this.sex = sex;
        this.age = age;
        this.weight = weight;
        this.allergies = allergies;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public char getSex() {
        return sex;
    }

    public void setSex(char sex) {
        this.sex = sex;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public float getWeight() {
        return weight;
    }

    public void setWeight(float weight) {
        this.weight = weight;
    }

    public boolean hasAllergies() {
        return allergies;
    }

    public void setAllergies(boolean allergies) {
        this.allergies = allergies;
    }

    public String toString() {
        return "Name: " + name + ", Sex: " + sex + ", Age: " + age + ", Allergies: " + allergies;
    }
}

下面是测试类的代码：

public class PatientTest {
    public static void main(String[] args) {
        Patient p1 = new Patient("John", 'M', 35, 70.5f, false);
        Patient p2 = new Patient("Jane", 'F', 27, 58.2f, true);

        System.out.println("Patient 1: " + p1.toString());
        System.out.println("Patient 2: " + p2.toString());

        p1.setAllergies(true);
        p2.setWeight(62.8f);

        System.out.println("Patient 1 updated: " + p1.toString());
        System.out.println("Patient 2 updated: " + p2.toString());
    }
}

输出结果为：

Patient 1: Name: John, Sex: M, Age: 35, Allergies: false
Patient 2: Name: Jane, Sex: F, Age: 27, Allergies: true
Patient 1 updated: Name: John, Sex: M, Age: 35, Allergies: true
Patient 2 updated: Name: Jane, Sex: F, Age: 27, Allergies: true

可以看到，我们成功地创建了两个Patient对象，并且能够设置和获取它们的属性。同时，我们也测试了toString方法，能够正确地显示一个病人的信息。