Java是一種廣泛應用的編程語言，具有良好的面向對象特性。本文將介紹如何使用Java設計一個教師類和課程類。

教師類可包含以下屬性：

public class Teacher {
private String name; //姓名
private int age; //年齡
private String gender; //性別
private String[] courses; //教授的課程
//構造函數
public Teacher(String name, int age, String gender, String[] courses) {
this.name = name;
this.age = age;
this.gender = gender;
this.courses = courses;
}
//getter和setter方法
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public String[] getCourses() {
return courses;
}
public void setCourses(String[] courses) {
this.courses = courses;
}
}

課程類可包含以下屬性：

public class Course {
private String name; //課程名稱
private int hours; //學時
private int credit; //學分
//構造函數
public Course(String name, int hours, int credit) {
this.name = name;
this.hours = hours;
this.credit = credit;
}
//getter和setter方法
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getHours() {
return hours;
}
public void setHours(int hours) {
this.hours = hours;
}
public int getCredit() {
return credit;
}
public void setCredit(int credit) {
this.credit = credit;
}
}

使用Java設計教師類和課程類，可方便實現教師和課程的管理。通過定義相應的屬性和方法，可以便捷地實現相關業務邏輯。