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How to delete all records from table in sqlite with Android?
... easiest way. developer.android.com/reference/android/database/sqlite/…, java.lang.String, java.lang.String[])
– Jayakrishnan
Dec 16 '16 at 14:43
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Where is the documentation for the values() method of Enum?
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You can't see this method in javadoc because it's added by the compiler.
Documented in three places :
Enum Types, from The Java Tutorials
The compiler automatically adds some special methods when it creates
an enum. For example, they have a st...
How to stop an unstoppable zombie job on Jenkins without restarting the server?
... hudson.model.Result.ABORTED,
new java.io.IOException("Aborting build")
);
share
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Android - print full exception backtrace to log
...f it) wrote the message. developer.android.com/reference/android/util/…, java.lang.String, java.lang.Throwable)
– EboMike
Jun 21 '16 at 14:53
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Why does this code using random strings print “hello world”?
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When an instance of java.util.Random is constructed with a specific seed parameter (in this case -229985452 or -147909649), it follows the random number generation algorithm beginning with that seed value.
Every Random constructed with the same...
static allocation in java - heap, stack and permanent generation
I have been lately reading a lot on memory allocation schemes in java, and there have been many doubts as I have been reading from various sources. I have collected my concepts, and I would request to go through all of the points and comment on them. I came to know that memory allocation is JVM spec...
海量数据相似度计算之simhash短文本查找 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...备度不高。
目前我们估算一下存储空间的大小，就以JAVA 来说，存储一个simhash 需要一个原生态 lang 类型是64位 = 8 byte，如果是 Object 对象还需要额外的 8 byte，所以我们尽量节约空间使用原生态的lang类型。假设增长到最大的5000...
Java 8 Streams - collect vs reduce
...sing an Integer constructor (new Integer(6)), which is deprecated in later Java versions.
– MC Emperor
Jun 13 '19 at 10:54
1
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Named placeholders in string formatting
...ready formatted correctly.
http://commons.apache.org/proper/commons-lang/javadocs/api-3.1/org/apache/commons/lang3/text/StrSubstitutor.html
Map<String, String> values = new HashMap<String, String>();
values.put("value", x);
values.put("column", y);
StrSubstitutor sub = new StrSubstitu...
What is the memory consumption of an object in Java?
... the actual object layout, footprint, and references, you can use the JOL (Java Object Layout) tool.
Object headers and Object references
In a modern 64-bit JDK, an object has a 12-byte header, padded to a multiple of 8 bytes, so the minimum object size is 16 bytes. For 32-bit JVMs, the overhead ...