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Comparing Java enum members: == or equals()?
I know that Java enums are compiled to classes with private constructors and a bunch of public static members. When comparing two members of a given enum, I've always used .equals() , e.g.
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String.format() to format double in java
...alFormat.setRoundingMode(RoundingMode.UP);
Here are the imports:
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.Locale;
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Is it possible to view bytecode of Class file? [duplicate]
Java source code is compiled into bytecode, which is actually in the class file. Is it possible to view bytecode of a compiled class?
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Can an int be null in Java?
Can an int be null in Java?
15 Answers
15
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Getting A File's Mime Type In Java
I was just wondering how most people fetch a mime type from a file in Java? So far I've tried two utils: JMimeMagic & Mime-Util .
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Is Java RegEx case-insensitive?
In Java, when doing a replaceAll to look for a regex pattern like:
5 Answers
5
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How to get just the parent directory name of a specific file
How to get ddd from the path name where the test.java resides.
10 Answers
10
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What is the status of JSR 305?
I have seen the question JSR305 vs. JSR308 (Java Type Anotations) - Which is going to be the standard? and I understand the difference between JSR 308 and JSR 305 .
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Easy way to write contents of a Java InputStream to an OutputStream
...mple way to write the contents of an InputStream to an OutputStream in Java. Obviously, the byte buffer code isn't difficult to write, but I suspect I'm just missing something which would make my life easier (and the code clearer).
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What does PermGen actually stand for?
.... Details are of course implementation specific.
Briefly, it contains the Java objects associated with classes and interned strings. In Sun's client implementation with sharing on, classes.jsa is memory mapped to form the initial data, with about half read-only and half copy-on-write.
Java objects...