多线程编程

code/Java/java-concurrency/src/main/java/com/heibaiying/yieldAndJoin/J1_Normal.java

@@ -0,0 +1,19 @@
+package com.heibaiying.yieldAndJoin;
+
+/**
+ * 正常情况下，输出 0
+ */
+public class J1_Normal {
+
+	private static int j = 0;
+
+	public static void main(String[] args) throws InterruptedException {
+		Thread thread = new Thread(() -> {
+			for (int i = 0; i < 100000; i++) {
+				j++;
+			}
+		});
+		thread.start();
+		System.out.println(j);
+	}
+}

code/Java/java-concurrency/src/main/java/com/heibaiying/yieldAndJoin/J2_Join.java

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+package com.heibaiying.yieldAndJoin;
+
+/**
+ * 使用Join让线程的并行执行换成串行执行，输出：100000
+ */
+public class J2_Join {
+
+	private static int j = 0;
+
+	public static void main(String[] args) throws InterruptedException {
+		Thread thread = new Thread(() -> {
+			for (int i = 0; i < 100000; i++) {
+				j++;
+			}
+		});
+		thread.start();
+		thread.join();
+		System.out.println(j);
+	}
+}