lecture

Author: onjsdnjs

src/main/java/io/concurrency/chapter02/exam02/MultiThreadAppTerminatedExample.java

@@ -2,30 +2,40 @@
 
 public class MultiThreadAppTerminatedExample {
     public static void main(String[] args) {
-        System.out.println("프로그램 시작");
 
-        // 멀티스레드 실행
         for (int i = 0; i < 3; i++) {
-            Thread thread = new Thread(new MyRunnable(i));
+            Thread thread = new Thread(new ThreadStackExample.MyRunnable(i));
             thread.start();
         }
 
         System.out.println("메인 스레드 종료");
+
     }
+    static class MyRunnable implements Runnable{
 
-    private static class MyRunnable implements Runnable {
-        private int threadId;
+        private final int threadId;
 
         public MyRunnable(int threadId) {
+
             this.threadId = threadId;
         }
 
         @Override
         public void run() {
-            for (int i = 0; i < 5; i++) {
-                System.out.println("스레드 " + threadId + " 작업 진행: " + i);
-            }
-            System.out.println("스레드 " + threadId + " 종료");
+            System.out.println(Thread.currentThread().getName() + ": 스레드 실행 중...");
+            firstMethod(threadId);
+        }
+
+        private void firstMethod(int threadId) {
+
+            int localValue = threadId + 100;
+            secondMethod(localValue);
+
+        }
+
+        private void secondMethod(int localValue) {
+            String objectReference = threadId + ": Hello World";
+            System.out.println(Thread.currentThread().getName() + " : 스레드 ID : " + threadId + ", Value:" + localValue);
         }
     }
 }

src/main/java/io/concurrency/chapter02/exam02/SingleThreadAppTerminatedExample.java

@@ -1,16 +1,16 @@
 package io.concurrency.chapter02.exam02;
 
 public class SingleThreadAppTerminatedExample {
-
     public static void main(String[] args) {
-        System.out.println("프로그램 시작");
 
-        // 단순한 작업 실행
-        for (int i = 0; i < 5; i++) {
-            System.out.println("작업 진행: " + i);
+        int sum = 0;
+        for (int i = 0; i <1000; i++) {
+            sum += i;
         }
 
-        System.out.println("프로그램 종료");
-    }
+        System.out.println("sum : " + sum);
 
+        System.out.println("메인 스레드 종료");
+
+    }
 }

src/main/java/io/concurrency/chapter02/exam02/ThreadStackExample.java

@@ -1,36 +1,39 @@
 package io.concurrency.chapter02.exam02;
 
 public class ThreadStackExample {
-
     public static void main(String[] args) {
-        // 스레드를 3개 생성하고 시작
+
         for (int i = 0; i < 3; i++) {
             Thread thread = new Thread(new MyRunnable(i));
             thread.start();
         }
+
     }
+    static class MyRunnable implements Runnable{
 
-    private static class MyRunnable implements Runnable {
-        private int threadId;
+        private final int threadId;
 
         public MyRunnable(int threadId) {
+
             this.threadId = threadId;
         }
 
         @Override
         public void run() {
+            System.out.println(Thread.currentThread().getName() + ": 스레드 실행 중...");
             firstMethod(threadId);
         }
 
-        private void firstMethod(int id) {
-            int localValue = id + 100; // 지역 변수
+        private void firstMethod(int threadId) {
+
+            int localValue = threadId + 100;
             secondMethod(localValue);
+
         }
 
-        private void secondMethod(int value) {
-            String localVar = "스레드 ID: " + threadId + ", Value: " + value;
-            System.out.println(localVar);
+        private void secondMethod(int localValue) {
+            String objectReference = threadId + ": Hello World";
+            System.out.println(Thread.currentThread().getName() + " : 스레드 ID : " + threadId + ", Value:" + localValue);
         }
     }
-
 }

src/main/java/io/concurrency/chapter02/exam02/ThreadStartRunExample.java

@@ -3,16 +3,25 @@
 public class ThreadStartRunExample {
     public static void main(String[] args) {
 
-        MyRunnable task = new MyRunnable();
-        Thread thread = new Thread(task);
+        MyRunnable myRunnable = new MyRunnable();
+        Thread thread = new Thread(new Runnable() {
+            @Override
+            public void run() {
+                System.out.println(Thread.currentThread().getName() + " :스레드 실행중..");
+            }
+        });
+
         thread.start();
 //        thread.run();
-//        task.run();
+//        myRunnable.run();
+
     }
-}
 
-class MyRunnable implements Runnable {
-    public void run() {
-        System.out.println("스레드 실행 중");
+    static class MyRunnable implements Runnable{
+
+        @Override
+        public void run() {
+            System.out.println(Thread.currentThread().getName() + ": 스레드 실행 중...");
+        }
     }
 }