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Java packages com and org
What are the meaning of the packages org and com in Java?
4 Answers
4
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What is the concept of erasure in generics in Java?
What is the concept of erasure in generics in Java?
8 Answers
8
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滚动布局管理器拓展 - ScrollArrangementHandler · App Inventor 2 中文网
...过度滚动
2 - 禁止过度滚动
（在不同版本的系统中过度滚动动画看起来可能会不太一样）
显示滚动条 布尔值
设置是否显示水平滚动条
滚动位置 数值 只读
返回当前的水平滚动位置
允许用户操作滚动布局 ...
Java: Get last element after split
...ble ways together!!
By using lastIndexOf() & substring() methods of Java.lang.String
// int firstIndex = str.indexOf( separator );
int lastIndexOf = str.lastIndexOf( separator );
String begningPortion = str.substring( 0, lastIndexOf );
String endPortion = str.substring( lastIndexOf + 1 );
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Access string.xml Resource File from Java Android Code
...339): FATAL EXCEPTION: main 08-27 20:16:04.844: ERROR/AndroidRuntime(339): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.string/com.string.string}: android.content.res.Resources$NotFoundException: String resource ID #0x7f050000
– Ravikiran
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Regex expressions in Java, \\s vs. \\s+
...nts the regex match from failing. from http://www.coderanch.com/t/570917/java/java/regex-difference
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Debug a java application without starting the JVM with debug arguments
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On Java 11 jsadebugd was replaced by jhsdb debugd. So that becomes jhsdb debugd --pid <pid>. See slides of a talk presenting jhsdb and the docs for jhsdb
– Delthas
May 1 at 4:07
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How can I get current date in Android?
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FYI, the terribly troublesome date-time classes such as java.util.Date, java.util.Calendar, and java.text.SimpleDateFormat are now legacy, supplanted by the java.time classes built into Java 8 and later. See Tutorial by Oracle.
– Basil Bourque
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What is a classpath and how do I set it?
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When programming in Java, you make other classes available to the class you are writing by putting something like this at the top of your source file:
import org.javaguy.coolframework.MyClass;
Or sometimes you 'bulk import' stuff by saying:
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Covariance, Invariance and Contravariance explained in plain English?
... I read some articles about Covariance, Contravariance (and Invariance) in Java. I read the English and German Wikipedia article, and some other blog posts and articles from IBM.
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