feat(05-reflect): Добавлено задание

labs/05-reflect/app/build.gradle.kts

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+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * This generated file contains a sample Java application project to get you started.
+ * For more details on building Java & JVM projects, please refer to https://docs.gradle.org/8.10.2/userguide/building_java_projects.html in the Gradle documentation.
+ */
+
+plugins {
+    // Apply the application plugin to add support for building a CLI application in Java.
+    application
+}
+
+repositories {
+    // Use Maven Central for resolving dependencies.
+    mavenCentral()
+}
+
+dependencies {
+    // This dependency is used by the application.
+    implementation(libs.guava)
+}
+
+// Apply a specific Java toolchain to ease working on different environments.
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(23)
+    }
+}
+
+application {
+    // Define the main class for the application.
+    mainClass = "ru.mrqiz.reflect.App"
+}
+
+tasks.named<Test>("test") {
+    // Use JUnit Platform for unit tests.
+    useJUnitPlatform()
+}
+
+tasks.named<JavaExec>("run") {
+   standardInput = System.`in`
+}
+

labs/05-reflect/app/src/main/java/ru/mrqiz/reflect/Access.java

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+package ru.mrqiz.reflect;
+
+import java.util.logging.FileHandler;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.logging.SimpleFormatter;
+
+class Access {
+  private static final Logger logger = Logger.getLogger(Access.class.getName());
+
+  private void privateMethod() {
+    logger.log(Level.WARNING, "calling the private one");
+  }
+
+  protected void protectedMethod() {
+    logger.log(Level.WARNING, "calling the protected one");
+  }
+
+  public void publicMethod() {
+    logger.log(Level.INFO, "calling the public one");
+  }
+
+  void defMethod() {
+    logger.log(Level.INFO, "default called");
+  }
+}
+
+

labs/05-reflect/app/src/main/java/ru/mrqiz/reflect/App.java

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+package ru.mrqiz.reflect;
+
+import java.lang.reflect.*;
+import java.util.logging.FileHandler;
+import java.util.logging.SimpleFormatter;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.ArrayList;
+import java.io.IOException;
+import java.nio.file.FileSystemException;
+import java.util.List;
+
+public class App {
+  private static final Logger logger = Logger.getLogger(App.class.getName());
+  private static FileHandler fileHandler;
+
+  static {
+    try {
+      fileHandler = new FileHandler("/tmp/some.log", true);
+      fileHandler.setFormatter(new SimpleFormatter());
+      logger.addHandler(fileHandler);
+      logger.setLevel(Level.ALL);
+    } catch (IOException e) {
+      logger.log(Level.SEVERE, "io is dead: ", e);
+    }
+  }
+
+  public static void main(String[] args) {
+    try {
+      Class<?> clazz = Access.class;
+      Object clazzObj = clazz.getDeclaredConstructor().newInstance();
+      Method[] methods = clazz.getDeclaredMethods();
+      for (Method method : methods) {
+        // something is broken here
+        // the default one still gets called..
+        // TODO: can u fix that?
+        if (!Modifier.isPublic(method.getModifiers()) || !method.isDefault()) {
+          method.setAccessible(true);
+          method.invoke(clazzObj);
+        }
+      }
+    } catch (InstantiationException e) {
+      logger.log(Level.SEVERE, "as i know there's no constructor: ", e);
+    } catch (IllegalAccessException e) {
+      logger.log(Level.SEVERE, "got a rly bad modifier: ", e);
+    } catch (InvocationTargetException e) {
+      logger.log(Level.SEVERE, "somebody throws something: ", e);
+    } catch (NoSuchMethodException e) {
+      logger.log(Level.SEVERE, "idk anything about this method: ", e);
+    }
+  }
+}
+