instanceof

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The difference between "instanceof List" and 'o instanceof List<?>"

I don\'t see any difference in the following: Object o = new LinkedList<Long>(); System.out.println(o instanceof List);[详细]

2023-03-12 03:49 分类：问答
Does instanceof return true if instance of a parent?

I have a class Child that extends Parent. Parent child = new Child(); if (child instanceof Parent){ // Do something开发者_如何转开发[详细]

2023-03-12 03:32 分类：问答
Checking the class type of a mock object

I\'m testing a method that gets an object and checks if that object is an instance of a class that is stored as instance variable. So far no problem.[详细]

2023-03-11 04:17 分类：问答
How to check if a given object is an instance of the class name given in a String?

I have the following variables MyObj myObj = new MyObj(); String myString = \"myPackage.MyObj\"; where MyObj look like this[详细]

2023-03-10 15:52 分类：问答
Avoiding 'instanceof' in Java

I have the following (maybe common) problem and it absolutely puzzles me at the moment: There are a couple of generated event objects which extends the abstract class Event and I want to divide them[详细]

2023-03-09 01:57 分类：问答
What's the point of new String("x") in JavaScript?

What are the use cases 开发者_如何学运维for doing new String(\"already a string\")? What\'s the whole point of it?There\'s very little practical use for String objects as created by new String(\"foo\[详细]

2023-02-28 04:14 分类：问答
Test if object is instanceof a parameter type

Is there a way to determine if an object is an instance of a generic type? public <T> test(Object obj) {[详细]

2023-02-27 04:03 分类：问答
IllegalAccessError when trying instanceof against AbstractDocument.UndoRedoDocumentEvent from javax.swing.text

In the source of javax.swing.text.DefaultCaret.Handler.insertUpdate(DocumentEvent) I found the following lines (starting at line 1685):[详细]

2023-02-24 00:37 分类：问答
Is it possible to use the instanceof operator in a switch statement?

I开发者_如何学C have a question of using switch case for instanceof object: For example: my problem can be reproduced in Java:[详细]

2023-02-22 13:18 分类：问答
JSF EL: instanceof reserved but not yet implemented?

I\'ve found the instanceof operator in JSF EL, but it throws an exception when us开发者_运维问答ed. It\'s obviously reserved but not implemented? When will it (probably) be available, if not already i[详细]

2023-02-22 07:12 分类：问答