大约有 7,479 项符合查询结果（耗时：0.0175秒） [XML]
Calling remove in foreach loop in Java [duplicate]
In Java, is it legal to call remove on a collection when iterating through the collection using a foreach loop? For instance:
...
What's the purpose of META-INF?
In Java, you often see a META-INF folder containing some meta files. What is the purpose of this folder and what can I put there?
...
What is the main difference between Inheritance and Polymorphism?
...dule open book exam today and found myself lost. I was reading Head first Java and both definitions seemed to be exactly the same. I was just wondering what the MAIN difference was for my own piece of mind. I know there are a number of similar questions to this but, none I have seen which provide a...
What is “the inverse side of the association” in a bidirectional JPA OneToMany/ManyToOne association
... table that should be used. This way you have a unidirectional relation in Java while still having a foreign key column in the Order table. So in the Object world, the Order doesn't know about Customer while in the database world, the Customer doesn't know about Order.
– Henno ...
Preferred Java way to ping an HTTP URL for availability
...e topic here. The question is: What is the preferred way to ping a URL in java?
6 Answers
...
Conversion from Long to Double in Java
...g to double conversion because long to double is a narrowing conversion in java.
Conversion from type double to type long requires a nontrivial translation from a 64-bit floating-point value to the 64-bit integer representation. Depending on the actual run-time value, information may be lost.
e.g...
What does (angle brackets) mean in Java?
I am currently studying Java and have recently been stumped by angle brackets(). What exactly do they mean?
6 Answers
...
How to use UTF-8 in resource properties with ResourceBundle
I need to use UTF-8 in my resource properties using Java's ResourceBundle . When I enter the text directly into the properties file, it displays as mojibake.
...
Read String line by line
...impler, but the Reader implementation beats the others hands down.
import java.io.BufferedReader;
import java.io.IOException;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
/**
* Test class for splitting a string into lines at linebreaks
...
A quick and easy way to join array elements with a separator (the opposite of split) in Java [duplic
...
Using Java 8 you can do this in a very clean way:
String.join(delimiter, elements);
This works in three ways:
1) directly specifying the elements
String joined1 = String.join(",", "a", "b", "c");
2) using arrays
String[] ar...