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kimmkingkimmking
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update spring01
1 parent 436102c commit b9bd39e

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+1007
-16
lines changed

‎03concurrency/0301/src/main/java/java0/conc0303/Homework03.java‎

Lines changed: 3 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,7 @@
11
package java0.conc0303;
22

3+
import java.util.concurrent.CountDownLatch;
4+
35
/**
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* 本周作业：（必做）思考有多少种方式，在main函数启动一个新线程或线程池，
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* 异步运行一个方法，拿到这个方法的返回值后，退出主线程？
@@ -14,7 +16,7 @@ public static void main(String[] args) {
1416
long start=System.currentTimeMillis();
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// 在这里创建一个线程或线程池，
1618
// 异步执行 下面方法
17-
19+
1820
int result = sum(); //这是得到的返回值
1921

2022
// 确保 拿到result 并输出

‎03concurrency/0301/src/main/java/java0/conc0303/collection/CopyOnWriteArrayListDemo.java‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -14,10 +14,10 @@ public static void main(String[] args) {
1414
// why Vector 也不安全
1515
// List<Integer> list = new ArrayList<Integer>();
1616
// List<Integer> list = new LinkedList<>();
17-
// List<Integer> list = new Vector<>();
17+
List<Integer> list = new Vector<>();
1818

1919
// 只有CopyOnWriteArrayList 安全，不报错
20-
List<Integer> list = new CopyOnWriteArrayList();
20+
//List<Integer> list = new CopyOnWriteArrayList();
2121

2222
for (int i = 0; i < 10000; i++)
2323
{

‎03concurrency/0301/src/main/java/java0/conc0303/collection/CopyOnWriteArrayListDemo1.java‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -9,8 +9,8 @@
99

1010
public class CopyOnWriteArrayListDemo1 {
1111
private static final int THREAD_POOL_MAX_NUM = 10;
12-
//private List<String> mList = new ArrayList<String>(); // ArrayList 无法运行
13-
private List<String> mList = new CopyOnWriteArrayList<>();
12+
private List<String> mList = new ArrayList<String>(); // ArrayList 无法运行
13+
//private List<String> mList = new CopyOnWriteArrayList<>();
1414

1515
public static void main(String args[]) {
1616
new CopyOnWriteArrayListDemo1().start();

‎03concurrency/0301/src/main/java/java0/conc0303/future/CompletableFutureDemo.java‎

Lines changed: 4 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -23,7 +23,7 @@ public static void main(String[] args){
2323
e.printStackTrace();
2424
}
2525
return "Hello";
26-
}).thenCombine(CompletableFuture.supplyAsync(()->{
26+
}).thenCombine(CompletableFuture.supplyAsync(()->{
2727
try {
2828
Thread.sleep(2000);
2929
} catch (InterruptedException e) {
@@ -34,7 +34,8 @@ public static void main(String[] args){
3434
System.out.println("thenCombine:"+result3);
3535

3636
CompletableFuture.supplyAsync(() -> "Hello, java course.")
37-
.thenApply(String::toUpperCase).thenCompose(s -> CompletableFuture.supplyAsync(s::toLowerCase)).thenAccept(v -> { System.out.println("thenCompose:"+v);});
37+
.thenApply(String::toUpperCase).thenCompose(s -> CompletableFuture.supplyAsync(s::toLowerCase))
38+
.thenAccept(v -> { System.out.println("thenCompose:"+v);});
3839

3940
// 4.竞争
4041
System.out.println("=====>4.竞争");
@@ -68,7 +69,7 @@ public static void main(String[] args){
6869
}
6970

7071
return "Hi Boy";
71-
}).exceptionally(e->{
72+
}).exceptionally(e->{ // Fluent API
7273
System.out.println(e.getMessage());
7374
return "Hello world!";
7475
}).join();

‎03concurrency/0301/src/main/java/java0/conc0303/stream/StreamParallelDemo.java‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -19,7 +19,7 @@ public static void main(String[] args) {
1919
// // 串行，单线程
2020
// longList.stream().forEach(
2121
// 并行，默认使用CPU * 2个线程
22-
longList.stream().parallel().forEach(
22+
longList.stream().forEach(
2323
i -> {
2424
try {
2525
blockingQueue.put(i);

‎03concurrency/0301/src/main/java/java0/conc0303/tool/CountDownLatchDemo.java‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -5,7 +5,7 @@
55
public class CountDownLatchDemo {
66
public static void main(String[] args) throws InterruptedException {
77
CountDownLatch countDownLatch = new CountDownLatch(5);
8-
for(int i=0;i<5;i++){
8+
for(int i=0;i<10;i++){
99
new Thread(new readNum(i,countDownLatch)).start();
1010
}
1111
countDownLatch.await(); // 注意跟CyclicBarrier不同，这里在主线程await

‎03concurrency/0301/src/main/java/java0/conc0303/tool/CountDownLatchDemo2.java‎

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -20,6 +20,7 @@ public static void main(String[] args) throws Exception {
2020
exec.execute(() -> {
2121
try {
2222
test(threadNum);
23+
//countDownLatch.countDown();
2324
} catch (Exception e) {
2425
e.printStackTrace();
2526
} finally {
@@ -29,7 +30,7 @@ public static void main(String[] args) throws Exception {
2930
}
3031
countDownLatch.await();
3132
System.out.println("==>所有程序员完成任务，项目顺利上线！");
32-
exec.shutdown();
33+
//exec.shutdown();
3334
}
3435

3536
private static void test(int threadNum) throws Exception {

‎03concurrency/0301/src/main/java/java0/conc0303/tool/CyclicBarrierDemo.java‎

Lines changed: 5 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -9,13 +9,16 @@ public static void main(String[] args) throws InterruptedException {
99
public void run() {
1010
System.out.println("回调>>"+Thread.currentThread().getName());
1111
System.out.println("回调>>线程组执行结束");
12+
System.out.println("==>各个子线程执行结束。。。。");
1213
}
1314
});
1415
for (int i = 0; i < 5; i++) {
1516
new Thread(new readNum(i,cyclicBarrier)).start();
1617
}
17-
18-
System.out.println("==>各个子线程执行结束。。。。");
18+
19+
// ==>>>
20+
21+
1922
System.out.println("==>主线程执行结束。。。。");
2023

2124
//CyclicBarrier 可以重复利用，

‎03concurrency/0301/src/main/java/java0/conc0303/tool/CyclicBarrierDemo2.java‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -18,7 +18,7 @@ public static void main(String[] args) {
1818
e.printStackTrace();
1919
}
2020

21-
System.out.println("CyclicBarrier重用");
21+
System.out.println("====> CyclicBarrier重用");
2222

2323
for(int i=0;i<N;i++) {
2424
new Writer(barrier).start();

‎03concurrency/0301/src/main/java/java0/conc0303/tool/SemaphoreDemo.java‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -6,7 +6,7 @@ public class SemaphoreDemo {
66

77
public static void main(String[] args) {
88
int N = 8; //工人数
9-
Semaphore semaphore = new Semaphore(5); //机器数目
9+
Semaphore semaphore = new Semaphore(1); //机器数目
1010
for (int i = 0; i < N; i++)
1111
new Worker(i, semaphore).start();
1212
}

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