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Java is one of the most popular programming languages in the world, and for good reason. It offers a ton of useful methods that make coding easier, faster, and more efficient. As a Java developer, it’s important to know the most commonly used methods and how they work. In this blog post, we will look at 10 must-know Java methods that every developer should be familiar with.
1. toString() – This method is used to convert an object to a string. It is very useful when you want to print out an object’s value in a human-readable format.
2. equals() – This method is used to compare two objects to see if they are equal. It’s important to note that this method compares the values of the objects, not the memory addresses.
3. hashCode() – This method returns a unique integer value for an object. The hash code is used by various data structures such as hash maps and hash sets.
4. getClass() – This method returns the class of an object. It’s commonly used when you need to determine the type of an object at runtime.
5. parseInt() – This method is used to convert a string to an integer. It’s very useful when handling user input or reading from a file.
6. length() – This method returns the length of a string. It’s commonly used when you need to determine the size of a string or array.
7. substring() – This method is used to extract a substring from a string. It’s useful when you only need a portion of a larger string.
8. trim() – This method is used to remove white space from the beginning and end of a string. It’s useful when you need to compare strings or perform other operations.
9. format() – This method is used to format a string. It allows you to insert variables into a string and control how they are displayed.
10. wait() – This method is used to suspend the execution of a thread. It’s commonly used in multithreaded applications.
Knowing these 10 methods will make your life as a Java developer much easier. They are fundamental methods that are used in a wide variety of applications. By understanding how they work, you’ll be better equipped to solve problems and write more efficient code.
