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- import java.io.BufferedReader;
- import java.io.IOException;
- import java.io.InputStreamReader;
- import java.nio.file.Files;
- import java.nio.file.Paths;
- import java.util.*;
- public class LocalVariableTypeInferenceTest {
- private void processOrder(String order) {
- System.out.println(order);
- }
- public static void main(String[] args) throws Exception {
- // local variable use
- var test = new LocalVariableTypeInferenceTest();
- // infers HashSet<String> vs Set<String> orders = new HashSet<>();
- var orders = new HashSet<String>();
- // indexed for-loop use
- for (var i = 0; i < 5; i++) {
- orders.add(UUID.randomUUID().toString());
- }
- // for-each use
- for (var order : orders) {
- // process an order
- test.processOrder(order);
- }
- // infers Stream<String>
- var stream = orders.stream();
- stream.forEachOrdered(test::processOrder);
- // try-with-resources use
- try (var in = Files.newInputStream(Paths.get("./src/LocalVariableTypeInferenceTest.java")); var reader = new BufferedReader(new InputStreamReader(in))) {
- // print the imports
- reader.lines().takeWhile(e -> !e.startsWith("public")).forEachOrdered(System.out::println);
- } catch (IOException e) {
- throw e;
- }
- }
- }
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