大约有 7,479 项符合查询结果（耗时：0.0152秒） [XML]
Why does Java's hashCode() in String use 31 as a multiplier?
Per the Java documentation, the hash code for a String object is computed as:
13 Answers
...
Why are you not able to declare a class as static in Java?
Why are you not able to declare a class as static in Java?
14 Answers
14
...
Does Java support default parameter values?
I came across some Java code that had the following structure:
24 Answers
24
...
Is it safe to get values from a java.util.HashMap from multiple threads (no modification)?
... accessed (via get(key) only) from multiple threads. Is it safe to use a java.util.HashMap in this way?
12 Answers
...
Copying a HashMap in Java
...ashmap
Program for copy all elements from one hashmap to another
import java.util.HashMap;
public class CloneHashMap {
public static void main(String a[]) {
HashMap hashMap = new HashMap();
HashMap hashMap1 = new HashMap();
hashMap.put(1, "One");
...
How to sort by two fields in Java?
... As this question/ answer still gets linked, please note that with Java SE 8 this became much simpler. If there are getters you can write Comparator<Person> comparator = Comparator.comparing(Person::getName).thenComparingInt(Person::getAge);
– Puce
...
Java equivalent of unsigned long long?
...unsigned integer, via unsigned long long int , or via uint64_t . Now, in Java longs are 64 bits, I know. However, they are signed.
...
What does a just-in-time (JIT) compiler do?
...guage but yes, purely interpreted code (without any JITting) is slow. Even Java bytecode without a JITter is really slow.
– Mark Cidade
Sep 18 '08 at 22:07
49
...
JAVA线程池管理及分布式HADOOP调度框架搭建 - 人工智能(AI) - 清泛IT社区，...
...变成多线程程序呢？不同的语言有不同的实现，这里说下java语言的实现多线程的两种方式：扩展java.lang.Thread类、实现java.lang.Runnable接口。
先看个例子，假设有100个数据需要分发并且计算。看下单线程的处理速度：package thread;
...
Why can't I define a static method in a Java interface?
EDIT: As of Java 8, static methods are now allowed in interfaces.
24 Answers
24
...