Ready to transform your Java knowledge from theory to practice? Java remains a powerhouse in the tech world, and the best way to master it is by getting your hands dirty with real code. We have hand-picked three essential labs from our Java learning path that tackle everyday programming challenges. Whether you are handling data or cleaning up lists, these exercises will sharpen your logic and boost your confidence.
Read XML File
Difficulty: Beginner | Time: 25 minutes
In this lab, we will learn how to read an XML file using Java. We will be using a sample XML file to demonstrate reading the file using Java code. XML is a markup language used to store and transport data.
Practice on LabEx → | Tutorial →
Substring Replacement in Java
Difficulty: Beginner | Time: 50 minutes
In this lab, we will learn how to replace substrings in a String using Java programming language. We will be using different methods available in Java to replace single/multiple characters or substrings. In the end, we will have a clear understanding of how to implement these methods in Java code.
Practice on LabEx → | Tutorial →
Remove Duplicates From ArrayList
Difficulty: Beginner | Time: 50 minutes
In Java, an ArrayList can store duplicate elements. If we want to remove the duplicates and only keep unique elements, we have to take specific steps. In this Lab, we will learn how to remove duplicates from an ArrayList in two ways: using a HashSet and using the distinct() method of Stream.
Practice on LabEx → | Tutorial →
Mastering Java is a journey of small wins. These three labs provide the perfect starting point to build a solid foundation in data handling and collection management. Don't just read about code—run it, break it, and fix it in our interactive playground. Start your first lab now and see how much you can achieve in under an hour!
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