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Java SecurityException: signer information does not match
... Can someone explain to newbies how to do that? I started working with java and spring a week ago and i'm lost.
– mghz
Mar 14 '14 at 21:51
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implements Closeable or implements AutoCloseable
I'm in the process of learning Java and I cannot find any good explanation on the implements Closeable and the implements AutoCloseable interfaces.
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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;
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How do I generate random integers within a specific range in Java?
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In Java 1.7 or later, the standard way to do this is as follows:
import java.util.concurrent.ThreadLocalRandom;
// nextInt is normally exclusive of the top value,
// so add 1 to make it inclusive
int randomNum = ThreadLocalRan...
How to convert a String to CharSequence?
How to convert String to CharSequence in Java?
5 Answers
5
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How to split a string in Java
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@Crowie: javadoc-style.
– BalusC
Aug 1 '13 at 12:04
9
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Cast Double to Integer in Java
Any way to cast java.lang.Double to java.lang.Integer ?
17 Answers
17
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Passing a String by Reference in Java?
... it doesn't allocate new String objects every time. In fact when you write Java code like s = "Hello " + name, then the compiler will generate byte code which creates a StringBuilder and calls append() two times.
– Aaron Digulla
May 7 '19 at 13:36
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How to import a .cer certificate into a java keystore?
During the development of a Java webservice client I ran into a problem. Authentication for the webservice is using a client certificate, a username and a password. The client certificate I received from the company behind the webservice is in .cer format. When I inspect the file using a text edit...
Convert an array of primitive longs into a List of Longs
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I found it convenient to do using apache commons lang ArrayUtils (JavaDoc, Maven dependency)
import org.apache.commons.lang3.ArrayUtils;
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long[] input = someAPI.getSomeLongs();
Long[] inputBoxed = ArrayUtils.toObject(input);
List<Long> inputAsList = Arrays.asList(inputBoxed);
it...