1 class PersonA { 2 private String name; 3 public void setName(String newName) { 4 name=newName; 5 } 6 public String getName(){ 7 return name; 8 } 9 } 10 class StudentA extends PersonA { 11 private String department; 12 public void setDepartment(String newDepartment) { 13 department=newDepartment; 14 } 15 public String getDepartment() { 16 return department; 17 } 18 } 19 class C2_2 { 20 public static void main(String[] args) { 21 StudentA s1=new StudentA(); 22 s1.setName("张三"); 23 s1.setDepartment("计算机系"); 24 System.out.println("姓名: "+s1.getName()); 25 System.out.println("系别: "+s1.getDepartment()); 26 } 27 }
继承。