java-bridge-method

问题 I am trying to deploy my first Plotly Dash app (written in Python) to Heroku. I am having trouble with bundling up all the packages to compile the app, currently with Python-javabridge. When I try to deploy my app, even after deleting python-javabridge from the requirements.txt , it still tries to bundle it, giving me the following error: remote: Collecting jeepney>=0.4.2; sys_platform == "linux" remote: Downloading jeepney-0.6.0-py3-none-any.whl (45 kB) remote: Collecting importlib-resources

问题 The code following is taken from Oracle documentation of generics - class Node<T> { public T data; public Node(T data) { this.data = data; } public void setData(T data) { System.out.println("Node.setData"); this.data = data; } } class MyNode extends Node<Integer> { public MyNode(Integer data) { super(data); } public void setData(Integer data) { System.out.println("MyNode.setData"); super.setData(data); } public static void main(String[] args) { MyNode mn = new MyNode(5); Node n = mn; // A raw

问题 I am wondering why the Java compiler would add a bridge method for the foo method here: public class Outer { class SuperClass { public void foo() { } } public class SubClass extends SuperClass { } } The foo method is compiled to be public in the SuperClass type. Nevertheless, the SubClass method redefines the method as a bridge to the very same method. I wonder why this bridge is necessary. 回答1: The rational for adding this bridge method is a corner-case in the Java reflection API which would