Java 9 try-with-resources Improvement » grokonez

Java 9 try-with-resources Improvement » grokonez

Java 9 Try-with-resources makes an improved way of writing code. Now we can simplify our code and keep it cleaner and clearer.

https://grokonez.com/java/java-9/java-9-try-resources-improvement

Java 9 try-with-resources Improvement

Java 7 introduces a new approach for closing resources by try-with-resources statement. After that, Java 9 try-with-resources makes an improved way of writing code. Now we can simplify our code and keep it cleaner and clearer.

Related post: Java 7 – try-with-resources Statement

1. Java 7 try-with-resources

This is the way we use it from Java 7:

try (BufferedReader br = new BufferedReader(new FileReader("C://readfile/input.txt"))) {
    String line;
    while (null != (line = br.readLine())) {
        // processing each line of file
        System.out.println(line);
    }
} catch (IOException e) {
    e.printStackTrace();
}
It is good, but we have to declare the variable in try() block. That's because we can't use resource which is declared outside the try() block within it. If resource is already declared outside, we should re-refer it with local variable:

// BufferedReader is declared outside try() block
BufferedReader br = new BufferedReader(new FileReader("C://readfile/input.txt"));

try (BufferedReader inBr = br) { // ... } } catch (IOException e) { // ... }

2. Java 9 try-with-resources improvement

Java 9 make things simple:

https://grokonez.com/java/java-9/java-9-try-resources-improvement

Java 9 try-with-resources Improvement

java java9 try-with-resources

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Java 7 - try-with-resources Statement » grokonez

Java 7 provides a new approach for closing resources with clean & clear code by try-with-resources statment. In the article, JavaSampleApproach will introduce the benifit when programming by try-with-resources statement. Related Post: Understand Java Exception & The effect to Java Program (Single & Multi Thread) ContentsI. ConceptsII. Practice1. Use Java6 or early version and Problems2. … Continue reading "Java 7 – try-with-resources Statement"

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