public static void main(String[] args) {
try {
Class clazz = Class.forName(Student.class.getName());
// 获取无参构造方法对象
Constructor constructor = clazz.getDeclaredConstructor();
constructor.setAccessible(true);
// 通过无参构造方法对象创建对象
Object obj = constructor.newInstance();
System.out.println(obj);
// 通过反射给所有成员变量赋值
// System.out.println("****通过反射给所有成员变量赋值****");
// // private String name;
Field nameField = clazz.getDeclaredField("name");
nameField.setAccessible(true);
nameField.set(obj, "风清杨");
System.out.println(obj);
// // int age;
Field ageField = clazz.getDeclaredField("age");
ageField.setAccessible(true);
ageField.set(obj, 27);
System.out.println(obj);
// 通过反射给所有构造方法赋值
Constructor constructor2 = clazz.getDeclaredConstructor(String.class,int.class);
constructor2.setAccessible(true);
Object obj1 = constructor2.newInstance("张三丰",28);
System.out.println(obj1);
//反射调用方法
Method method1 = clazz.getDeclaredMethod("getValue",String.class);
method1.setAccessible(true);
method1.invoke(obj, "uabhj");
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
public class Student {
private String name;
public int age;
private Student() {}
private Student(String name,int age) {
this.name = name;
this.age = age;
}
private void getValue(String a) {
System.out.println(a);
System.out.println(name+"\t"+age);
}
}
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