methods

Why we must handle exception for method not throwing exceptions? [duplicate]

由 |▌冷眼眸甩不掉的悲伤 提交于 2019-12-13 06:21:41
问题 This question already has answers here : use of exception in inheritance (6 answers) Closed 6 years ago . Given public class ToBeTestHandleException{ static class A { void process() throws Exception { throw new Exception(); } } static class B extends A { void process() { System.out.println("B "); } } public static void main(String[] args) { A a = new B(); a.process(); } } Why we should handle the exception at line (a.process()) ?.The method process of class B does not throw exception at all?

PHP: Send Values To HTML Form With Curl In PHP

由 ⅰ亾dé卋堺 提交于 2019-12-13 05:48:41
问题 Excuse me for my question ... This has been discussed many times but i didn't notice... :( we have this html form : <!DOCTYPE html> <html> <head> <title>Comment</title> </head> <body> <fieldset> <legend align="center">Comments</legend> <form action="server.php" method="post"> Name: <input type="text" name="name" /><br><br> Email: <input type="email" name="email" /><br><br> Web: <input type="url" name="web" /><br><br> Message:<br> <textarea name="comment"></textarea><br><br> <input type=

Error when trying to use variable in different method

由 青春壹個敷衍的年華 提交于 2019-12-13 05:35:20
问题 After following the advice on my last question HERE , I ran into the problem with an exception: java.lang.ArrayIndexOutOfBoundsException My program reads data from a file about (currently) two particles and their current position, velocity, and force (with an x,y, and z for all three attributes). Here is my file: 2 1 1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2 1 1.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 The first number is count , how many particles there are. Each particle has an ID, type, and

Class Name for Java anonymous class [duplicate]

由 喜夏-厌秋 提交于 2019-12-13 05:22:48
问题 This question already has answers here : Why getClass returns the name of the class + $1 (or $*) (3 answers) Closed 6 years ago . Class A{ public void test(){ B b = new B(); System.out.println( "Class Name: " + b.createClassC().getClass() ); } } Class B{ public C createClassC(){ C c = new C(){ @Override public boolean equals( Object other ){ return true; } }; } } Class C{ int val = 8; } Output: Class Name: package.name.here .B Can some one tell me why anonymous class types gives the enclosing

Undeclared identifier “viewDidLoad”

由 最后都变了- 提交于 2019-12-13 05:13:24
问题 //Objects list //objects scroll UIScrollView *objects; objects=[[UIScrollView alloc]initWithFrame:CGRectMake(0,80,512,688)]; objects.showsVerticalScrollIndicator=YES; objects.scrollEnabled=YES; objects.userInteractionEnabled=YES; objects.backgroundColor = [UIColor clearColor]; [self.view addSubview:objects]; [objects setUserInteractionEnabled:YES]; [objects setCanCancelContentTouches:YES]; objects.contentSize = CGSizeMake(512,689); //divider UIButton *divider = [UIButton buttonWithType

Safe Methods in Meteor

由 痞子三分冷 提交于 2019-12-13 04:58:10
问题 I'm working on a messaging app using Meteor. I disabled any insert/update/remove called from the client for security reasons. The only way to insert messages now is by using Methods. Meteor.methods({ sendMessage: function (text) { Messages.insert({ userId: Meteor.userId(), roomId: Rooms.findOne()._id, name: Meteor.users.find(Meteor.userId()).fetch()[0].profile.name , message: text }); } }); This approach asks only for the content of the message, so there's no way for a user to call the method

The method gameRender() is undefined for the type GamePanel

由 梦想的初衷 提交于 2019-12-13 04:51:48
问题 I did everything that was correct and for some reason Eclipse thinks that the the method gameRender() is undefined for the type GamePanel : package Game_Package; import java.awt.Color; import java.awt.Dimension; import javax.swing.JPanel; public class GamePanel extends JPanel implements Runnable{ private static final int PWIDTH = 900; private static final int PHIEGHT = 900; private Thread animator; private volatile boolean running = false; private volatile boolean gameOver = false; public

Counting Wins in a Ping Pong game

由 若如初见. 提交于 2019-12-13 04:42:33
问题 Create a method in Scores.java that takes 2 arguments: player1Scores and player2Scores. The method should print out the number of games player1 won and the number of games player2 won. This is the last part to an assignment given by our teacher and I can't figure out where to start. I was thinking a simple compare each win but thats not provided by the Player1Score. It only stores the current score of the game thats going on. I need to be able to calculate all the games that have happened.

Getting keys of a class in typescript

由 荒凉一梦 提交于 2019-12-13 04:39:19
问题 I have a class with a lot of methods let's call it myClass. I'm calling it like this: myClass[key]() Is there a way to get the possible values from key? I hoped for something like keyof myClass, but I got 'myClass refers to a value, but is being used as a type here' The problem is probably that as of now myClass is defined in a .js-file and encapsulated like this: const myClass = new MyActualClass(); export default myClass Is it possible to extract the information without converting the .js

How can I put,read,and modified my ArrayList Objects on a .txt file? [duplicate]

由 匆匆过客 提交于 2019-12-13 04:37:52
问题 This question already has answers here : Java - How to write ArrayList Objects into txt file? (2 answers) Closed 6 years ago . Here is the modified code, when i run the program it works,but it doesn't work as i expected. I don't know why it won't write the lines that i typed after typing "add", and also it didn't show anything when i typed "show". Seems like i might missing something : import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io
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