Java Coding Tips & Tricks for beginners

“Java is the foundation for virtually every type of networked application and is the global standard for developing and delivering mobile applications, games, Web-based content, and enterprise software.” — Oracle

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Java is a popular programming language used for developing various applications. Tips and tricks for Java include using effective debugging techniques, understanding the importance of memory management, and utilizing the power of Java frameworks and libraries.

In this article I have curated some other of the most sought after java techniques that could be very helpful for someone getting started.

1. Use the final keyword to prevent a variable from being reassigned, or a method from being overridden.

final int x = 5;

2. Use the extends keyword to create a subclass, and the super keyword to call a superclass method.

class Subclass extends Superclass {
    // code here
}

3. Use try-with-resources statement for automatic resource management.

try (BufferedReader br = new BufferedReader(new FileReader("file.txt"))) {
    // read from file
} catch (IOException e) {
    // handle exception
}

4. Use java.time package for working with dates and times.

LocalDate today = LocalDate.now();
LocalDate birthday = LocalDate.of(1995, Month.JULY, 22);
Period p = Period.between(birthday, today);

5. Use java.util.Optional class to handle null values.

Optional<String> optional = Optional.of("value");
if (optional.isPresent()) {
    System.out.println(optional.get());
}

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6. Use java.util.stream package for functional-style operations on streams of elements.

List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5);
int sum = numbers.stream()
                .filter(n -> n % 2 == 0)
                .mapToInt(Integer::intValue)
                .sum();

7. Use StringBuilder instead of String for concatenating large number of strings.

StringBuilder sb = new StringBuilder();
sb.append("Hello");
sb.append(" ");
sb.append("world!");
String result = sb.toString();

8. Use the transient keyword to indicate that a field should not be serialized.

private transient int x;

9. Use the instanceof operator to check if an object is an instance of a particular class or interface.

if (myObject instanceof MyClass) {
    // code here
}

10. Use the assert statement to check for unexpected conditions in your code.

assert x > 0 : "x must be positive";

Java is a popular programming language used for developing various applications. Tips for Java include using effective debugging techniques, understanding the importance of memory management, and utilizing the power of Java frameworks and libraries. Overall, with the right knowledge and techniques, Java developers can create high-quality, reliable, and efficient code.

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