1.操作類
獲取類,並通過反射獲取一個實例對象
Class class1 = Student.class;
Student student = (Student)class1.newInstance(); //默認調用無參數的構造方法
student.setName("heh");
System.out.println(student.getName());
2.操作構造方法
獲取指定參數類型的構造方法,通過此對象創建一個特定參數值的實例對象
Class class1 = Student.class;
Constructor<?> constructor = class1.getConstructor(String.class,String.class,int.class);
Student student1=(Student)constructor.newInstance("123","456",12);
System.out.println(student1.getAge());
3.操作普通方法
Class class1 = Student.class;
Student student=(Student)class1.newInstance();
Method method=class1.getMethod("setAge", int.class);
method.invoke(student,10);
System.out.println(student.getAge());
4.操作屬性
Class class1 = Student.class;
Student student = (Student) class1.newInstance();
Field fiel=class1.getDeclaredField("age");
fiel.setAccessible(true); //AccessibleTest類中的成員變量爲private,故必須進行此操作
fiel.set(student, 10);
System.out.println(student.getAge());
5.修改數組的值
int[] a= {1,2,3,4,5,6,7,8,9};
Class class1 = a.getClass().getComponentType(); //返回表示數組組件類型的 Class。如果此類不表示數組類,則此方法返回 null
System.out.println("數組數據的名稱:"+class1.getName());
System.out.println("數組的長度:"+Array.getLength(a));
System.out.println("數據的第一個元素的值:"+Array.get(a,0));
Array.set(a, 0, 12);
System.out.println("數據的第一個元素的值:"+Array.get(a,0));