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What is the best way to implement constants in Java? [closed]
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The previous comment about import static only applies to Java 5+. Some feel the shorthand isn't worth the possible confusion as to where the constant came from, when reading long code, MaxSeconds.MAX_SECONDS may be easier to follow then going up and looking at the imports.
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How to print a float with 2 decimal places in Java?
...ike so:
System.out.printf("%.2f", val);
In short, the %.2f syntax tells Java to return your variable (val) with 2 decimal places (.2) in decimal representation of a floating-point number (f) from the start of the format specifier (%).
There are other conversion characters you can use besides f:
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Should I use string.isEmpty() or “”.equals(string)?
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source code to the String class is available java2s.com/Open-Source/Java-Document/6.0-JDK-Core/lang/java/…
– David Young
Jul 24 '10 at 5:22
1
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“R cannot be resolved to a variable”? [duplicate]
...is the best way to solve this problem: [Android Development- Where is my R.Java file?][2]
R.java not regenerating
R cannot be resolved - Android error
R cannot be resolved to a variable
R cannot be resolved to a variable -- mailing list entry
Fixed: R cannot be resolved to a variable
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How to return multiple objects from a Java method?
I want to return two objects from a Java method and was wondering what could be a good way of doing so?
25 Answers
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Is passing 'this' in a method call accepted practice in java
...estion is always easier to argument), I just opened one of the most common java.lang classes, the String one, and of course I found instances of this use, for example
1084 // Argument is a String
1085 if (cs.equals(this))
1086 return true;
Look for (this in big "accepted"...
UnmodifiableMap (Java Collections) vs ImmutableMap (Google) [duplicate]
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Now with Java 9, you can use: Map<String,String> unmodifiableMap = Map.ofEntries(entry("A","B"), entry("C","D"), entry("E","F")); which is more beautiful to my mind
– Steph
Sep 11 '18 at 13...
Create a Path from String in Java7
How can I create a java.nio.file.Path object from a String object in Java 7?
4 Answers
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Describe the architecture you use for Java web applications? [closed]
Let's share Java based web application architectures!
10 Answers
10
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Relationship between hashCode and equals method in Java [duplicate]
I read in many places saying while override equals method in Java, should override hashCode method too, otherwise it is "violating the contract".
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