All About String in Java
Last updated: September 28, 2023
Mocking is an essential part of unit testing, and the Mockito library makes it easy to write clean and intuitive unit tests for your Java code.
Get started with mocking and improve your application tests using our Mockito guide:
Handling concurrency in an application can be a tricky process with many potential pitfalls. A solid grasp of the fundamentals will go a long way to help minimize these issues.
Get started with understanding multi-threaded applications with our Java Concurrency guide:
Spring 5 added support for reactive programming with the Spring WebFlux module, which has been improved upon ever since. Get started with the Reactor project basics and reactive programming in Spring Boot:
Since its introduction in Java 8, the Stream API has become a staple of Java development. The basic operations like iterating, filtering, mapping sequences of elements are deceptively simple to use.
But these can also be overused and fall into some common pitfalls.
To get a better understanding on how Streams work and how to combine them with other language features, check out our guide to Java Streams:
Explore Spring Boot 3 and Spring 6 in-depth through building a full REST API with the framework:
Yes, Spring Security can be complex, from the more advanced functionality within the Core to the deep OAuth support in the framework.
I built the security material as two full courses - Core and OAuth, to get practical with these more complex scenarios. We explore when and how to use each feature and code through it on the backing project.
You can explore the course here:
Spring Data JPA is a great way to handle the complexity of JPA with the powerful simplicity of Spring Boot.
Get started with Spring Data JPA through the guided reference course:
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In distributed systems, managing multi-step processes (e.g., validating a driver, calculating fares, notifying users) can be difficult. We need to manage state, scattered retry logic, and maintain context when services fail.
Dapr Workflows solves this via Durable Execution which includes automatic state persistence, replaying workflows after failures and built-in resilience through retries, timeouts and error handling.
In this tutorial, we'll see how to orchestrate a multi-step flow for a ride-hailing application by integrating Dapr Workflows and Spring Boot:
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String Basics
- String Initialization in Java
- Why String Is Immutable in Java?
- Concatenating Strings in Java
- Guide to Java String Pool
- How to Iterate Over the String Characters in Java
- Comparing Strings in Java
- String Templates in Java
- Guide to Character Encoding
- Java Multi-line String
- Java Text Blocks
- String Interpolation in Java
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String Basic Manipulations
- Checking for Empty or Blank Strings in Java
- Split a String in Java
- Adding a Newline Character to a String in Java
- How to Remove the Last Character of a String?
- How to Reverse a String in Java
- Check If a String Is Numeric in Java
- Check If a String Is a Valid Date in Java
- Capitalize the First Letter of a String in Java
- Remove Whitespace From a String in Java
- String Concatenation in Java
- Convert a Comma Separated String to a List in Java
- Difference Between String isEmpty() and isBlank()
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String Advanced Manipulations
- Java – Generate Random String
- Count Occurrences of a Char in a String
- Check if a String Is a Palindrome in Java
- Check if Two Strings Are Anagrams in Java
- Encode a String to UTF-8 in Java
- Pad a String with Zeros or Spaces in Java
- Remove or Replace Part of a String in Java
- Splitting a Java String by Multiple Delimiters
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String Helper Classes
- Guide to java.util.Formatter
- Quick Guide to the Java StringTokenizer
- StringBuilder vs StringBuffer in Java
- Java StringJoiner
- String Operations with Java Streams
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String Conversions
- Converting Strings to Enums in Java
- Converting a Stack Trace to a String in Java
- Converting String to Stream of chars
- Converting a List to String in Java
- Map to String Conversion in Java
- Format ZonedDateTime to String
- Guide to Escaping Characters in Java RegExps
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String Array Conversions
- Array to String Conversions
- Convert Character Array to String in Java
- Convert String to Byte Array and Reverse in Java
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String Numeric Conversions
- Converting String to BigDecimal in Java
- Convert Long to String in Java
- Convert String to Float and Back in Java
- Check if a String Contains a Number Value in Java
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String IO Conversions
- Java InputStream to String
- Java String to InputStream
- Java – String to Reader
- Java – Reader to String
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String Tools
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String API
- Java String.String()
- Java String.codePointCount()
- Java String.codePointAt()
- Java String.concat()
- Java String.contains()
- Java String.copyValueOf()
- Java String.endsWith()
- Java String.format()
- Java String.getBytes()
- Java String.indexOf()
- Java String.intern()
- Java String.isEmpty()
- Java String.lastIndexOf()
- Java String.regionMatches()
- Java String.replace()
- Java String.replaceAll()
- Java String.split()
- Java String.startsWith()
- Java String.subSequence()
- Java String.substring()
- Java String.toLowerCase()
- Java String.toUpperCase()
- Java String.trim()
- Java String.valueOf()
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