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Why does String.valueOf(null) throw a NullPointerException?
...Of method is overloaded:
String.valueOf(Object)
String.valueOf(char[])
Java Specification Language mandates that in these kind of cases, the most specific overload is chosen:
JLS 15.12.2.5 Choosing the Most Specific Method
If more than one member method is both accessible and applicable to...
Java String remove all non numeric characters
Trying to remove all letters and characters that are not 0-9 and a period. I'm using Character.isDigit() but it also removes decimal, how can I also keep the decimal?
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Create a File object in memory from a string in Java
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A File object in Java is a representation of a path to a directory or file, not the file itself. You don't need to have write access to the filesystem to create a File object, you only need it if you intend to actually write to the file (usi...
Get an OutputStream into a String
What's the best way to pipe the output from an java.io.OutputStream to a String in Java?
5 Answers
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Getting value of public static final field/property of a class in Java via reflection
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It's not an Android question, it's a Java reflection question that uses a particular example. Questions are tagged based on their topic.
– Matthew Read
Dec 19 '16 at 17:05
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Check if a String contains numbers Java
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The code below is enough for "Check if a String contains numbers in Java"
Pattern p = Pattern.compile("([0-9])");
Matcher m = p.matcher("Here is ur string");
if(m.find()){
System.out.println("Hello "+m.find());
}
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JavaScript OOP in NodeJS: how?
I am used to the classical OOP as in Java.
6 Answers
6
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Abstract class in Java
What is an "abstract class" in Java?
14 Answers
14
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Is it possible to declare a variable in Gradle usable in Java?
Is it possible to declare a variable in Gradle usable in Java ?
Basically I would like to declare some vars in the build.gradle and then getting it (obviously) at build time. Just like a pre-processor macros in C/C++...
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Convert String to Uri
How can I convert a String to a Uri in Java (Android)? i.e.:
6 Answers
6
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