java Archives - Page 4 of 302

Java, Programming

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Sort an array in Java

I’m trying to make a program that consists of an array of 10 integers which all has a random value, so far so ...

June 3, 2022
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Java, Programming

IT Nursery

Why are arrays covariant but generics are invariant?

From Effective Java by Joshua Bloch, Arrays differ from generic type in two important ways. First arrays are covariant. Generics are invariant. Covariant ...

June 3, 2022
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Java, Programming

IT Nursery

Extract source code from .jar file

Is there a way to extract the source code from an executable .jar file (Java ME)? 11 Answers 11

June 3, 2022
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Java, Programming

IT Nursery

Integer.valueOf() vs. Integer.parseInt() [duplicate]

This question already has answers here: Different between parseInt() and valueOf() in java? (11 answers) Closed 4 years ago. Aside from Integer.parseInt() handling ...

June 3, 2022
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Java, Programming

IT Nursery

What is difference between Errors and Exceptions? [duplicate]

This question already has answers here: Closed 11 years ago. Possible Duplicate: Differences betweeen Exception and Error How can I differentiate between Errors ...

June 3, 2022
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Java, Programming

IT Nursery

Java 8 forEach with index [duplicate]

This question already has answers here: Is there a concise way to iterate over a stream with indices in Java 8? (23 answers) ...

June 3, 2022
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Java, Programming

IT Nursery

Match multiline text using regular expression

I am trying to match a multi line text using java. When I use the Pattern class with the Pattern.MULTILINE modifier, I am ...

June 3, 2022
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Java, Programming

IT Nursery

Pass a local file in to URL in Java

How do I create a new URL object using a local file, for the purpose of unit tests? 8 Answers 8

June 3, 2022
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Java, Programming

IT Nursery

Java Byte Array to String to Byte Array

I’m trying to understand a byte to string, string representation of byte to byte conversion… I convert my byte...

June 3, 2022
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Java, Programming

IT Nursery

How to test code dependent on environment variables using JUnit?

I have a piece of Java code which uses an environment variable and the behaviour of the code depends on the value of ...

June 3, 2022
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