11b - IO classes

materials/2024-2025/11b/2024-11-11-io/.gitignore

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+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

materials/2024-2025/11b/2024-11-11-io/2024-11-11-io.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

materials/2024-2025/11b/2024-11-11-io/src/Main.java

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+import java.io.*;
+import java.nio.file.Paths;
+import java.util.Scanner;
+
+public class Main {
+    public static class MyException extends Exception {
+        public MyException(String arg) {
+            super(arg);
+        }
+    };
+
+    static void foo(Object arg) throws FileNotFoundException, MyException {
+//        try {
+            if (arg == null)
+                throw new MyException("Invalid argument");
+
+            throw new FileNotFoundException();
+            // do some work
+//        } catch (FileNotFoundException e) {
+//            throw new RuntimeException(e);
+//        }
+    }
+
+    static void bar() throws MyException {
+        System.out.println("Hello world!");
+
+        try {
+            foo(null);
+        } catch (FileNotFoundException e) {
+//            System.out.println(e.getStackTrace());
+            e.printStackTrace();
+        } catch (MyException e) {
+//            System.out.println(e.getStackTrace());
+            e.printStackTrace();
+//            return;
+            throw e;
+        } finally {
+            System.out.println("In main finally");
+        }
+
+        System.out.println("AFter catch");
+    }
+
+    static void baz() {
+//        InputStream is = new BufferedInputStream(System.in);
+//        BufferedInputStream is = new BufferedInputStream(System.in);
+//        DataInputStream dis = new DataInputStream(is);
+
+//        try {
+//            int c;
+//            while((c = is.read()) != -1) {
+//                System.out.println(c);
+//            }
+//        } catch (IOException e) {
+//            System.out.printf("Failed to read");
+//            System.out.printf(e.getMessage());
+//        }
+
+//        try {
+//            int a = dis.readInt();
+//            String b = dis.readLine();
+//            System.out.println(a);
+//            System.out.println(b);
+//        } catch (IOException e) {
+//            System.out.printf("Failed to read");
+//            System.out.printf(e.getMessage());
+//        }
+        BufferedReader br = new BufferedReader(
+                new InputStreamReader(System.in)
+        );
+        try {
+            System.out.println(br.readLine());
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+
+        Scanner sc = new Scanner(
+                new BufferedInputStream(System.in)
+        );
+        while(sc.hasNextLine()) {
+            sc.nextLine();
+        }
+
+        try {
+            Scanner fsc = new Scanner(
+//                    new FileInputStream("./in.txt")
+//                    new BufferedInputStream(
+//                            new FileInputStream("./in.txt")
+//                    )
+//                    "./in.txt"
+                    Paths.get("./in.txt")
+            );
+
+        } catch (FileNotFoundException e) {
+            e.printStackTrace();
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static void main(String[] args) throws MyException {
+//        bar();
+        baz();
+    }
+}