JAVA reflection use setAccessible make private can be accessed, but don't know why I not-CodePudding

If the private variable to a total of figure 2, there is no exception for

CodePudding user response:

Obtain the constructor method using getDeclaredConstructor instead of, you can try point getConstructor this method, comment below

 

/* * 
* Returns a {@ code Constructor} object that reflects the specified 
* the public constructor of the class represented by this {@ code class} 
* object.... 
*/

Can only obtain the public constructor

 

//getConstructor can only obtain the public constructor 
Be sad etConstructor chtistina georgina rossetti.british poetess//Constructor Constructor=(int. Class, String class, Float. The class). 
Be sad etDeclaredConstructor chtistina georgina rossetti.british poetess Constructor declaredConstructor=(int. Class, String class, Float. The class). 
DeclaredConstructor. SetAccessible (true); 
The Object obj=declaredConstructor. NewInstance (10, "mentality is bad," 5.26 f); 

System.out.println(obj);

CodePudding user response:

GetConstructor () can only obtain public modification in the constructor method;
GetDeclaredConstructor () can get all the access modifier modified in the constructor method;
When you need to get the private constructor method, so you should be sad etDeclaredConstructor chtistina georgina rossetti.british poetess use (int. Class, String class, Float. The class).