method-parameters | 易学教程

Powershell function call changing passed string into int

阅读更多关于 Powershell function call changing passed string into int

问题 So I am using the kind of buggy Sapien powershell studio to make a powershell driven GUI application, and I am attempting to perform an ADSI query. $nameOfDeviceInput is a System.Windows.Forms.TextBox On one form, I have the following function: $buttonPerformAction_Click={ if (FindInAD($nameOfDeviceInput.Text).Count -gt 0) { $buttonPerformAction.BackColor = 'Red' $buttonPerformAction.Text = "System already exists in AD with that name. Try another name" return } ..... } On the "main" form, I

Is mutating object-parameters in a method(in Java) a bad practice?

阅读更多关于 Is mutating object-parameters in a method(in Java) a bad practice?

问题 I have a question about mutating method-paramaters(which are objects) in a method. I read and heard multiple times that it is a bad practice to mutate a object in a method which was passed in as a paramater. As example: public void modifyList(List<Object> list) { list.add(new Object()); } Instead, the passed in Object should be copied, the mutation should be performed on the copied object and the copied object should be returned. As example: public List<Object> getModifiedList(List<Object>

How to get Method Parameter names in Java 8 using reflection?

阅读更多关于 How to get Method Parameter names in Java 8 using reflection?

问题 Java 8 has the ability to acquire method parameter names using Reflection API. How can I get these method parameter names? As per my knowledge, class files do not store formal parameter names. How can I get these using reflection? 回答1: How can i get these method parameter names? Basically, you need to: get a reference to a Class From the Class , get a reference to a Method by calling getDeclaredMethod() or getDeclaredMethods() which returns references to Method objects From the Method object,

Are method parameters thread safe in Java?

阅读更多关于 Are method parameters thread safe in Java?

Class Shared{ public void sharedMethod(Object o){ //does something to Object } } //this is how threads call the shared method run(){ sharedInstance.sharedMethod(someObject); } Now the o is being passed as the parameter to the method. And the same method is being called by multiple threads in parallel. Can we safely say that this code is thread safe? There are two scenarios: If the someObject is being shared among the threads If every Thread has its own copy of someObject No you cannot say that. Method parameters are local to threads, meaning each one has their own copy of the o reference

Are method parameters thread safe in Java?

阅读更多关于 Are method parameters thread safe in Java?

问题 Class Shared{ public void sharedMethod(Object o){ //does something to Object } } //this is how threads call the shared method run(){ sharedInstance.sharedMethod(someObject); } Now the o is being passed as the parameter to the method. And the same method is being called by multiple threads in parallel. Can we safely say that this code is thread safe? There are two scenarios: If the someObject is being shared among the threads If every Thread has its own copy of someObject 回答1: No you cannot

How to get Method Parameter names in Java 8 using reflection?

阅读更多关于 How to get Method Parameter names in Java 8 using reflection?

Java 8 has the ability to acquire method parameter names using Reflection API. How can I get these method parameter names? As per my knowledge, class files do not store formal parameter names. How can I get these using reflection? Andreas Fester How can i get these method parameter names? Basically, you need to: get a reference to a Class From the Class , get a reference to a Method by calling getDeclaredMethod() or getDeclaredMethods() which returns references to Method objects From the Method object, call (new as of Java 8) getParameters() which returns an array of Parameter objects On the