methods

问题 I make an Android app and I want in my MainActivity.java to make a counter of my onResume method calls so that during onResume's: 1) first call to setContentView(R.layout.layout1); and 2) second call to setContentView(R.layout.layout2); According to documentation that I seeked I should make a static variable that will be increased for every onResume's call. How could I implement it please? Thank you in advance. 回答1: Perhaps something like this (rough template) public class MainActivity {

问题 Hy, Is not enough securizing urls? Is there a way a user could call a url without the neeeded credentials and this is the reason to secure methods? A real example why secure methods is neccesary and not just urls? Thanks 回答1: It is usually enough to secure only URLs in simple cases. Think about method level security as an addition to URL level security. For example a simple check that a user has a particular role to access some URL in your app can be achieved with the aid of URL level

问题 I have a simple class and I would like to measure method call times how can I do that? Looking for generic way to achieve that so I can apply it to more difficult classes as well. Thank you import java.io.*; import java.util.*; public class Turtle { private String name; private Formatter f; public Turtle(String name, Formatter f) { this.name = name; this.f = f; } public void move(int x, int y) { f.format("%s The Turtle is at (%d,%d)\n", name, x, y); } public static void main(String[] args) {

问题 I have a simple class and I would like to measure method call times how can I do that? Looking for generic way to achieve that so I can apply it to more difficult classes as well. Thank you import java.io.*; import java.util.*; public class Turtle { private String name; private Formatter f; public Turtle(String name, Formatter f) { this.name = name; this.f = f; } public void move(int x, int y) { f.format("%s The Turtle is at (%d,%d)\n", name, x, y); } public static void main(String[] args) {

问题 How do I wrap a method around this Async section of codes so I can get the variable "doc" returned as a returned value so I can reuse this method? I can't declare a static method inside this class, and when I tried to use a void method, the variable "doc" can't be returned, and there's also errors in the code. class JsoupParseTask extends AsyncTask<String, Void, Document> { protected Document doInBackground(String... urls) { Document doc = null; try { doc = Jsoup.connect("https://jsoup.org//"

问题 example struct B1{int x; void f(){x = 1;}}; struct D : B1{int x; void f(){B1::x = 2;}}; using Dmp = void(D::*)(); using B1mp = void(B1::*)(); int main() { Dmp dmp = &D::f; D d; (d.*dmp)(); // ok B1mp b1mp = static_cast<B1mp>(dmp); // hm, well that's weird B1 b1; (b1.*b1mp)(); dmp = &B1::f; // ok } And this example will compile and run just fine, and no problem will arise. But wait, now I'm going to use D::x in D::f , and now -- anything can happen at runtime. Yes, you can also static_cast a

问题 This question already has answers here : Differences between System.out.println() and return in Java (3 answers) Closed 4 months ago . I am very new to coding and was just introduced to static methods, so I apologize in advance for the silly mistakes. The method should display a triangle when the method is called under main, but I am getting an empty console and there is no output. However, if I write this under main: String triangle = getTriangle(3, 4); System.out.println(triangle); then,

问题 "Given that FileInputStream’s constructor throws FileNotFoundException, which is a subclass of Exception, write the header for a public method named process that takes a String parameter and returns nothing, and whose body instantiates a FileInputStream object and does not contain a try-catch statement." I know it's a too-simple question but I want to make sure I'm not messing up in a dumb way. Also, not sure whether to use FileNotFoundException or just Exception or IO, etc. public process

问题 I have been trying to reset a static variable that will keep count when certain methods are run. I want to be able to reset the counter after I return the output of one of the methods. The getEfficency will pull the value just fine, but after I run the getEfficency I would like for the static variable to be reset to 0, so that my program can run the other compute method. public class Sequence { private static int efficencyCount; public static int computeIterative(int n) { efficencyCount++; }

问题 I'm working with a task specific .NET plattform, which is precompiled and not OpenSource. For some tasks I need to extend this class, but not by inheriting from it. I simply want to add a method. At first I want to show you a dummycode existing class: public class Matrix<T> where T : new() { ... public T values[,]; ... } I want to extend this class in the following way: public static class MatrixExtension { public static T getCalcResult<T>(this Matrix<T> mat) { T result = 0; ... return result