课程: Java Memory Management: Values and References

The importance of understanding Java memory - Java教程

课程: Java Memory Management: Values and References

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The importance of understanding Java memory

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- [Instructor] Understanding how the Java memory works comes with a lot of advantages for your Java coding. It's easier to visualize what's going on with object composition. The phenomenon that classes have other classes. And for example, the Person class has property address, which also happens to be a class. Knowing how this all is working in a memory, it actually makes it easier to know what steps to take to get a certain data field. Also, the concept of static and accessing the instance with a This keyword will be so much easier to visualize and understand when you understand how the memory of Java works. Without understanding how the memory works, it's actually impossible to truly grasp the concept of the Static and This keyword. Another advantage of understanding Java memory is to Pass by value and pass by reference concepts. It makes a lot more sense all of a sudden, once you understand how the Java memory is working. And this also helps you with understanding immutability and mutability of objects. Also, some more complex topics will make a lot more sense, for example, concurrency. It's very possible that you haven't worked for it yet, but as a Java developer, you'll have to do so one day. Understanding the Java memory makes it easier to understand certain aspects of concurrency, especially the data access. Another complex topic, a very fun topic actually, that you'd be able to better understand is the Garbage collection, and the great news here is that in the very last chapter of this course, we'll be touching upon this concept already. It will actually help you on so many other fields as well. For example, the difference between primitives and the wrapper classes, and all these things you're probably using on a daily basis now already become a lot clearer when you better understand how the Java memory works. At this point, you might be wondering what I'm still waiting for and you are dying to get started. And you're right, we'll be discussing the basics of memory management, the stack, and the heap memory in more detail in this chapter. Let's start with the basics of how the JVM deals with the memory management.

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