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How to subtract X day from a Date object in Java?
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Java 8 and later
With Java 8's date time API change, Use LocalDate
LocalDate date = LocalDate.now().minusDays(300);
Similarly you can have
LocalDate date = someLocalDateInstance.minusDays(300);
Refer to https://stackov...
Comparing strings with == which are declared final in Java
I have a simple question about strings in Java. The following segment of simple code just concatenates two strings and then compares them with == .
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How does the Java 'for each' loop work?
...uses an int index counter and checks against array.length instead. See the Java Language Specification.
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How to get the current time in YYYY-MM-DD HH:MI:Sec.Millisecond format in Java?
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@NickG Where is this toString(String format) method? The java.util.Date doesn't seem to have it. Are you referring to the Joda Time API? But one possible benefit is reuse of the same formatter object. Another is you don't have to add an API - Date class is a standard Java library c...
Declaring variables inside or outside of a loop
...this does not apply to your example, due to the immutability of strings in java: a new instance of str will always be created in the beginning of your loop and it will have to be thrown away at the end of it, so there is no possibility to optimize there.
EDIT: (injecting my comment below in the ans...
What is java pojo class, java bean, normal class? [duplicate]
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Normal Class: A Java class
Java Beans:
All properties private (use getters/setters)
A public no-argument constructor
Implements Serializable.
Pojo:
Plain Old Java Object is a Java object not bound by any restriction other than those for...
Convert a JSON string to object in Java ME?
Is there a way in Java/J2ME to convert a string, such as:
14 Answers
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How to get the current date/time in Java [duplicate]
What's the best way to get the current date/time in Java?
28 Answers
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Android中Java和JavaScript交互 - 更多技术 - 清泛网 - 专注C/C++及内核技术
Android中Java和JavaScript交互interaction-between-java-and-javascript-in-androidAndroid提供了一个很强大的WebView控件用来处理Web网页，而在网页中，JavaScript又是一个很举足轻重的脚本。本文将介绍如何实现Java代码和Javascript代码的相互调用。如...
Environment variable to control java.io.tmpdir?
...cc writes it's temporary files, but I can't seem to find an equivalent for java's createTempFile API.
7 Answers
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