overloading

问题 Is there any way to override a non-virtual method? or something that gives similar results (other than creating a new method to call the desired method)? I would like to override a method from Microsoft.Xna.Framework.Graphics.GraphicsDevice with unit testing in mind. 回答1: No, you cannot override a non-virtual method. The closest thing you can do is hide the method by creating a new method with the same name but this is not advisable as it breaks good design principles. But even hiding a

问题 Is there any way to override a non-virtual method? or something that gives similar results (other than creating a new method to call the desired method)? I would like to override a method from Microsoft.Xna.Framework.Graphics.GraphicsDevice with unit testing in mind. 回答1: No, you cannot override a non-virtual method. The closest thing you can do is hide the method by creating a new method with the same name but this is not advisable as it breaks good design principles. But even hiding a

问题 Is there any way to override a non-virtual method? or something that gives similar results (other than creating a new method to call the desired method)? I would like to override a method from Microsoft.Xna.Framework.Graphics.GraphicsDevice with unit testing in mind. 回答1: No, you cannot override a non-virtual method. The closest thing you can do is hide the method by creating a new method with the same name but this is not advisable as it breaks good design principles. But even hiding a

问题 Here's a nice pitfall I just encountered. Consider a list of integers: List<Integer> list = new ArrayList<Integer>(); list.add(5); list.add(6); list.add(7); list.add(1); Any educated guess on what happens when you execute list.remove(1) ? What about list.remove(new Integer(1)) ? This can cause some nasty bugs. What is the proper way to differentiate between remove(int index), which removes an element from given index and remove(Object o), which removes an element by reference, when dealing

问题 Here's a nice pitfall I just encountered. Consider a list of integers: List<Integer> list = new ArrayList<Integer>(); list.add(5); list.add(6); list.add(7); list.add(1); Any educated guess on what happens when you execute list.remove(1) ? What about list.remove(new Integer(1)) ? This can cause some nasty bugs. What is the proper way to differentiate between remove(int index), which removes an element from given index and remove(Object o), which removes an element by reference, when dealing

问题 After reading overloaded constructors from a book, i tired the following code: public class Employee { String name; int idNumber; public Employee(){ this("JJ", 0); System.out.println(name +" "+ idNumber); } public Employee(String name, int num){ this.name = name; idNumber = num; System.out.println(name +" 2nd "+ idNumber); } } public class Object1 { public static void main(String[] args) { Employee emp = new Employee(); } } OUTPUT: JJ 2nd 0 JJ 0 I am really confused. Why "JJ 2nd 0" printed

问题 How can I modify the following code in such way I don't need to repeat f2=11; f3=12; in the main function. The code is for overloading the most common operators. class FLOAT{ private: float x; public: FLOAT(){ x=0.0; } void setFloat(float f) { x=f; } float getFloat() { return x;}; FLOAT operator+(FLOAT obj) {x=x+obj.x; return *this;}; FLOAT operator-(FLOAT obj) {x=x-obj.x; return *this;}; FLOAT operator*(FLOAT obj) {x=x*obj.x; return *this;}; FLOAT operator/(FLOAT obj) {x=x/obj.x; return

问题 How can I modify the following code in such way I don't need to repeat f2=11; f3=12; in the main function. The code is for overloading the most common operators. class FLOAT{ private: float x; public: FLOAT(){ x=0.0; } void setFloat(float f) { x=f; } float getFloat() { return x;}; FLOAT operator+(FLOAT obj) {x=x+obj.x; return *this;}; FLOAT operator-(FLOAT obj) {x=x-obj.x; return *this;}; FLOAT operator*(FLOAT obj) {x=x*obj.x; return *this;}; FLOAT operator/(FLOAT obj) {x=x/obj.x; return

问题 How can I modify the following code in such way I don't need to repeat f2=11; f3=12; in the main function. The code is for overloading the most common operators. class FLOAT{ private: float x; public: FLOAT(){ x=0.0; } void setFloat(float f) { x=f; } float getFloat() { return x;}; FLOAT operator+(FLOAT obj) {x=x+obj.x; return *this;}; FLOAT operator-(FLOAT obj) {x=x-obj.x; return *this;}; FLOAT operator*(FLOAT obj) {x=x*obj.x; return *this;}; FLOAT operator/(FLOAT obj) {x=x/obj.x; return

问题 How can I modify the following code in such way I don't need to repeat f2=11; f3=12; in the main function. The code is for overloading the most common operators. class FLOAT{ private: float x; public: FLOAT(){ x=0.0; } void setFloat(float f) { x=f; } float getFloat() { return x;}; FLOAT operator+(FLOAT obj) {x=x+obj.x; return *this;}; FLOAT operator-(FLOAT obj) {x=x-obj.x; return *this;}; FLOAT operator*(FLOAT obj) {x=x*obj.x; return *this;}; FLOAT operator/(FLOAT obj) {x=x/obj.x; return