How to compare strings in Java?
String comparison in Java In Java, string comparison is used to compare two string values for equality or inequality. There are two main ways to compare strings in Java: using …
Read MoreRepeating a string using StringBuilder
Suppose you have the string ‘qwe’ and you need to repeat string ‘n’ times. Here’s how to do it with StringBuilder: Using StringBuilder and loop
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int n = 3; String in = "qwe"; StringBuilder b = new StringBuilder(n * in.length()); for (int i = 0; i < n; i += 1) { b.append(in); } String newString = b.toString(); |
How to configure a checkstyle in Jenkins
Last time, we set up a job checkstyle check locally. But for this test to be truly meaningful and to benefit the team, it is better to integrate this action …
Read MoreSetup Jenkins for private GitHub repository
Continuous integration is one of the key parts of the modern software development process. Today we will set up the integration of the popular jenkins automation server with the private …
Read MoreMaven does not find JUnit tests to run
For the tests in your project to work, certain settings are necessary. Here are some guidelines for avoiding basic mistakes.
Read MoreHow to use Maven through a proxy?
Sometimes inside corporate networks you may not have direct access to the Internet, but only through a proxy. In this article, we will look at how to use maven through …
Read MoreHow to add local jar files to a Maven project?
Imagine that you have implemented your java jar library and you need to connect it. Here are some examples of how to do it.
Read MoreHow to print a java array
Since Java 5 you can use Arrays.toString(arr) or Arrays.deepToString(arr) for arrays within arrays. Note that the Object[] version calls .toString() on each object in the array. The output is even …
Read MoreHow to parse JSON in Java
Google GSON library Let’s assume you have a class Book with just a title.
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private class Book { public String title; public Book(String title) { this.title = title; } } |
Create maven project and add dependencies.
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<dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>2.8.5</version> </dependency> |
Then write this code to transform JSON into class: …
Read MoreCode style examples from top java development companies
I decided to collect code style examples from the well-known company in the java community. There are both direct links to setting up the checkstyle and examples of setting the …
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